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SUNNY CENTRAL STRING-MONITOR US - Technical

1. Position Description A Green LED Ready B Green LED Receive Data C Orange LED Activity Explanation of the LEDs Green LED GreenLED Orange LED Description Ready Receive Activity Data permanently on Sunny Central String Monitor is in operation flashing flashing Internal error Please contact the SMA Serviceline see Section 14 Contact page 80 permanently on Internal error Please contact the SMA Serviceline see Section 14 Contact page 80 flashing Sunny Central String Monitor is communicating with the Sunny Central String Monitor Controller flashing Communication on RS485 bus 62 SSMUS TUSO945 11 Technical Description SMA Solar Technology AG Operation of the Sunny Central String Monitor 11 2 2 Status Display Sunny Central String Monitor Controller LED Overview Position Description A Green LED RDY B Orange LED ACT Explanation of the LEDs Green LED Orange LED Description RDY ACT permanently on Sunny Central String Monitor Controller is in operation flashing Communication is taking place with at least one Sunny Central String Monitor off e There is no communication taking place with any Sunny Central String Monitors or e The Sunny Central String Monitor Controller is no longer within the monitoring period Technical Description SSMUS TUSO9451 1 63 Operation of the Sunny Central String M
2. B Serial No Serial number of the Sunny Central String Monitor C Manufacturing Manufacturing version of Version the Sunny Central String Monitor 16 SSMUS TUSO94511 O US LISTED PV Array Combiner LISTED UL 1741 Technical Description SMA Solar Technology AG Mounting 4 Mounting This section provides guidelines to help you select the best mounting location suggestions to insure optimum performance cautions and warnings that you should follow to avoid injury and or equipment damage and step by step instructions for mounting a Sunny Central String Monitor CAUTION Risk of injury during transport of the Sunny Central String Monitor Injuries and contusion of body parts e Transport the Sunny Central String Monitor with two people or with a cart e Wear personal protective equipment 4 1 Selection of Mounting Location 4 1 1 Ambient Conditions e The installation method and mounting location must be suitable for the weight and dimensions Mounting on a solid surface e The mounting location must be accessible at all times e The ambient temperature must be between 13 113 F 25 C and 45 C Do not mount the Sunny Central String Monitor in a location where it is exposed to direct sunlight Technical Description SSMUS TUSO9451 1 17 Mounting SMA Solar Technology AG 4 1 2 Dimensions and Weight The Sunny Central String Monitor version 24 we
3. Monitor 1 Strip the cable by approx 0 3 in 8 mm 2 Open the screw terminal with a screwdriver counterclockwise 3 Plug the copper inner conductor of the cable into the screw terminal 4 Tighten the screw terminal with a screwdriver clockwise Required torques Wire size Torque 6 4 AWG 45 in lb 8 AWG AO in lb 10 AWG 35 in lb 5 Connect all DC cables of the modules as described above M The DC cables of the PV modules are connected Technical Description SSMUS TUSO9451 1 45 Electrical Connection SMA Solar Technology AG 7 4 2 PV modules Connecting DC The DC cables of the PV modules are connected at the fuse holders A in the Sunny Central String Monitor Use 90 C 194 F copper wire for all DC wiring connections to the fuse holders 1 Open the fuses with a screwdriver counterclockwise 1 Strip the cable by approx 0 47 in 12 mm 2 Plug the copper inner conductor of the cable into the fuse holder 3 Tighten the fuse holder with a screwdriver The required torque is 19 in lb Wire size Torque Rigid wire 10 6 AWG 19 in lb 2 2 Nm Multistrand wire 10
4. Position Description A PV modules B Sunny Central String Monitor G DC disconnect D Sunny Central AC fuse F AC disconnect G Public grid Any other application of the Sunny Central String Monitor installation of components and modifications that are not explicitly allowed endanger the safety and void the warranty as well as the operation permission 12 SSMUS TUS09451 1 Technical Description SMA Solar Technology AG Security It is prohibited e to use the Sunny Central String Monitor for purposes other than those indicated in this installation guide e to connect voltage sources to the Sunny Central String Monitor other than those consisting of PV modules e to modify the Sunny Central String Monitor or to install components that are not explicitly recommended by SMA or sold by SMA for this purpose 2 2 Safety Precautions A DANGER Improper performance of the tasks described in this manual Death or serious injuries All work on the Sunny Central String Monitor must only be carried out by a qualified personnel All work on the Sunny Central String Monitor may only be done as described in this manual e Pay attention to all safety precautions WARNING Risk of electric shock during operation of a damaged Sunny Central String Monitor Death or serious injuries e The Sunny Central String Monitor may only be used when it is technically faultless and safe
5. Technical Data for the Cables of the PV Modules Use 90 C 194 F copper wire for all DC wiring connections to the screw terminals between PV modules and Sunny Central String Monitor e Sunny Central String Monitor and Sunny Central Use 90 C 194 F copper wire for all DC wiring connections to the fuse holders Cables of PV Modules Cable Size Torque DC Rigid wire 10 6 AWG 19 in lb 2 2 Nm Multistrand wire 10 8 AWG DC 6 4 AWG 45 indb 5 Nm 8 AWG AO in lb 4 5 Nm 10 AWG 35 indb 4 Nm Technical Description SSMUS TUSO94511 41 Electrical Connection SMA Solar Technology AG 7 3 1 PV modules Connecting DC The DC cables of the PV modules are connected at the medium screw terminals A in the Sunny Central String Monitor 1 Strip the cable by approx 0 3 in 8 mm 2 Open the screw terminal with a screwdriver counterclockwise Plug the copper inner conductor of the cable into the screw terminal 4 Tighten the screw terminal with a screwdriver clockwise Required torques Wire size Torque 6 4 AWG 45 in lbb 5 Nm 8 AWG AO in lb 4 5 Nm 10 AWG 35 intb 4 Nm 5 Connect
6. Only use a 127 x 21 fuse from the company Ferraz Type Amp rap 2000 SmartSpot A6D with the following current rating 1 10A 1 Open the Sunny Central String Monitor as described in section 10 1 Opening Sunny Central String Monitor page 58 2 Remove the fuse from the holder A by pulling it forwards 3 Insert the new fuse into the holder Close the Sunny Central String Monitor as described in section 10 2 Closing the Sunny Central String Monitor page 59 M The fuse is replaced Technical Description SSMUS TUSO9451 1 57 Opening and Closing SMA Solar Technology AG 10 Opening and Closing 10 1 Opening Sunny Central String Monitor l DANGER Risk of electric shock when opening the Sunny Central String Monitor under load Death or serious injuries Cover the PV modules with an opaque dark material 1 Switch off the Sunny Central as described in the Sunny Central installation guide 1 DANGER High voltages are present in the Sunny Central String Monitor Death or serious injury due to electric shock Wait 5 minutes before opening the Sunny Central String Monitor Open the Sunny Central String Monitor Ensure that no voltage is present in the system Open the fuse holders Di wS 6 Pull the fuses out of the fu
7. 6 1 6 2 About this Manual cece cece eee ees 11 Target Gro p as cui no unin ene aia DS s UG as he ees 1 Area of Validiy ese ne ea eI ee 11 Securty sii ie as pu E See ee ee ae S 12 Appropriate Usage kb Laie iue Ae alia a oak enact 12 Safety Precautions 4 1 5 5 view ow AAdA area aaa Fh 4 GCI 13 Unpacking 90 40 mnnn eae e Hoan ents wes weeds 15 Unpacking and inspection lt o n onana an eee asuGueaws 15 Packing Listede saa ane et R E EE E 15 Identifying the Sunny Central String Monitor 16 MOUNTING Hoss tetas ho ats eee ee ae R 17 Selection of Mounting Location 000 ee eee 17 Ambient Conditions oeren e a Ne A a i a sae 17 Dimensions and Weight 0000 cece eee rererere run 18 Minimum Clera seare eee de nehtads abe eee a e ae ew nea la ded 18 Permissible Slantingvissctie sie enny oh a Aoi bade de Rd BE as Dame 19 Mounting to PV Module Racks 0000s cece ect e ee 19 Mounting OCP Ol put abe tin nets erin gee ee ost se ee 20 Mounting the Sunny Central String Monitor to a pole square 20 Mounting the Sunny Central String Monitor to a pole round 22 Mounting to a Wall tus Sanwa ayny tkates we eines 24 Mounting the Sunny Central String Monitor to a wall 26 Attaching the Cable Conduits 20 e000 28 Communication connector ce cee ee ee eeees 29 Preparing the Data Cable sc ech sjn ee ea ee Riga 30 Communication Conn
8. 8 AWG 4 Connect all DC cables of the modules as described above M The DC cables of the PV modules are connected l DANGER Risk of electric shock when working on the Sunny Central String Monitor with fuses closed Death or serious injuries DO NOT close the fuse holders Do not close the fuse holder until the PV system is put into operation 46 SSMUS TUSO94511 Technical Description SMA Solar Technology AG Electrical Connection 7 5 Connecting Sunny Central negative grounding The Sunny Central may not be connected until the communication and the PV modules have been connected see section 6 Communication connector page 29 section 7 2 Connecting ground page 38 and 7 4 Connecting the PV modules positive grounding page 44 1 DANGER Risk of electric shock through reverse voltage from Sunny Central Death or serious injuries e Disconnect the AC side from the Sunny Central as described in the installation guide of the Sunny Central Technical Data for the Connection to the Sunny Central Version 24 Version 32 Version 64 Max number of output 2 2 2 lines per potential DC Short Circuit Current 480 A 480 A 512A DC Max Continuous 308A 308A 328 A Current Technical Data for the Cables to the Sunny Central Use 90 C 194 F copper wire for all DC wiring connections to the Sunny Central String Monitor Cables to the Sunny Central Cable Size
9. Sunny Central Accessories SUNNY CENTRAL STRING MONITOR US Technical Description SSMUS TUS094511 98 4001411 Version 1 1 O SMA Solar Technology AG Copyright 2009 SMA America Inc All rights reserved No part of this document may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photographic magnetic or otherwise without the prior written permission of SMA America Inc SMA America makes no representations express or implied with respect to this documentation or any of the equipment and or software it may describe including with no limitation any implied warranties of utility merchantability or fitness for any particular purpose All such warranties are expressly disclaimed Neither SMA America nor its distributors or dealers shall be liable for any indirect incidental or consequential damages under any circumstances The exclusion of implied warranties may not apply in all cases under some statutes and thus the above exclusion may not apply Specifications are subject to change without notice Every attempt has been made to make this document complete accurate and up to date Readers are cautioned however that SMA America reserves the right to make changes without notice and shall not be responsible for any damages including indirect incidental or consequential damages caused by reliance on the material presented including but not limited to
10. E g for 4 30 22 p m enter 163022 11 4 2 Parameters for Sunny Central String Monitor The following table lists the parameters displayed in the user and installer modes The parameters with a grey background are only visible in the installer mode Name Firmware Adjustment range Default setting Description Firmware version of the Sunny Central String Monitor This parameter cannot be adjusted GrCh 0 6 This parameter enables you to allocate all the strings connected to the Sunny Central String Monitor to a group GrCh1 GrCh8 0 6 Group to which a string of the Sunny Central String Monitor has been allocated Please allocate all the strings connected to the Sunny Central String Monitor to a group The Sunny Central String Monitor does not monitor groups of less than 4 strings GrChO is not monitored Serial Number Serial number of the Sunny Central String Monitor This parameter cannot be adjusted SSMId Identification number of the Sunny Central String Monitor The Sunny Central String Monitor Controller displays errors on the basis of this Sunny Central String Monitor identification number Technical Description SSMUS TUSO945 1 1 69 Operation of the Sunny Central String Monitor SMA Solar Technology AG 11 5 Setting the PV Plant Monitoring System To set the PV plant monitoring system all actions described here must be carried out in
11. Risk of electric shock through reverse voltage from Sunny Central Death or serious injuries e Disconnect the Sunny Central Technical Data for the Connection to the Sunny Central Version 24 Version 32 Version 64 Max number of output 2 2 2 lines per potential DC Short Circuit Current 480 A 480 A 512A DC Max Continuous 308A 308A 328 A Current Technical Data for the Cables to the Sunny Central Use 90 C 194 F copper wire for all DC wiring connections to the Sunny Central String Monitor Cables to the Sunny Central Cable Size Torque DC 350 kemil 325 inlb DC 350 kcmil 325 inlb 50 SSMUS TUS09451 1 Technical Description SMA Solar Technology AG Electrical Connection 7 6 1 Sunny Central Connecting DC The DC cable of the Sunny Central is connected to the terminals A in the Sunny Central String Monitor 1 Strip the cable by approx 1 1 in 28 mm 1 1 in Loosen the hexagon screw with a wrench r ina q counterclockwise XN Put the hexagon screw and the washer aside N Pull the screw terminal from the rail Open the screw terminal using a hexagon allen
12. omissions typographical errors arithmetical errors or listing errors in the content material SMA America Incorporated 4031 Alvis Court Rocklin California 95677 4011 Tel 916 625 0870 Fax 916 625 0871 www sma america com Technical Description SSMUS TUSO9451 1 3 SMA Solar Technology AG IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important instructions for Models Sunny Central String Monitor U DC COMBINER BOX that shall be followed during installation and maintenance of the DC combiner box The Sunny Central String Monitor is designed and tested according to international safety requirements but as with all electrical and electronic equipment certain precautions must be observed when installing and or operating the Sunny Central String Monitor To reduce the risk of personal injury and to ensure the safe installation and operation of the Sunny Central String Monitor you must carefully read and follow all instructions cautions and warnings in this Installation Guide Warnings A Warning describes a hazard to equipment or personnel It calls attention to a procedure or practice which if not correctly performed or adhered to could result in damage to or destruction of part or all of the SMA equipment and or other equipment connected to the SMA equipment or personal injury A DANGER DANGER indicates a hazardous situation which if not avoided will result in death or serious injury WAR
13. 325 in lb Wire size Torque 350 kemil 325 inlb 5 Connect the second DC cable of the Sunny Central as described above if required M The DC cable of the Sunny Central is connected 52 SSMUS TUS09451 1 Technical Description SMA Solar Technology AG Commissioning 8 Commissioning 1 DANGER Risk of electric shock when closing the fuses under load Death or serious injuries Cover the PV modules with an opaque dark material e Follow all safety precautions of the module manufacturer The Sunny Central String Monitor is only one part of the PV power system The commissioning of the Sunny Central String Monitor may not be performed until all parts of the PV power system are set up A complete description of commissioning can be found in the commissioning protocol of the Sunny Central Technical Description SSMUS TUS09451 1 53 Maintenance and Cleaning 9 Maintenance and Cleaning SMA Solar Technology AG The Sunny Central String Monitor must be maintained at regular intervals Maintenance includes e Inspection of wearing parts and replacement thereof if necessary e Functionality test of components e Inspection of contact joints e Cleaning of housing and interior if necessary The maintenance intervals depend on the location and the ambient conditions A device installed in an environment with very dusty ambient air requires more frequent maintenance than indicated in the following table
14. 39 5 mm 0 2 in 5 5 mm 4 Open the screw terminal completely Cd 5 Insert wires into the terminal 30 SSMUS TUSO9451 1 Technical Description SMA Solar Technology AG 6 Tighten the screw terminal using a screwdriver The required torque is 2 2 in lb 0 25 Nm 7 Pull the wires to check that it is securely in place 8 Note down the wire color GND Data Data 9 Shorten the fourth wire which is unused M The data cable is prepared Technical Description Communication connector SSMUS TUSO9451 1 31 Communication connector SMA Solar Technology AG 6 2 Communication Connector Sunny Central String Monitor The data cable of the communication bus is attached with a plug at the top of the Sunny Central String Monitor Two sockets are present in the Sunny Central String Monitor for this purpose Position Description NC GND DATA DATA KR w hy Sunny Central String Monitor at the end of the communication bus If the Sunny Central String Monitor is at the end of the communication bus you only require one socket To ensure sufficient signal quality of the RS485 communication bus it must be terminated on both ends For this connect the termination resistor plug to the second socket Follow section 6 2 3 Terminate the RS485 bus in the Sunny Central String Monitor page 34 Sunny Central String Monitor within the co
15. DC cable of the Sunny Central as described above M The DC cable of the Sunny Central is connected 48 SSMUS TUS09451 1 Technical Description SMA Solar Technology AG Electrical Connection 7 5 2 Sunny Central Connecting DC The DC cable of the Sunny Central is connected to the terminals A in the Sunny Central String Monitor 1 Strip the cable by approx 1 1 in 28 mm 2 Open the screw terminal using an Allen key counterclockwise 3 Plug the copper inner conductor of the cable into the screw terminal 4 Tighten the screw terminal using an Allen key The required torque is 325 in lb Wire size Torque 350 kemil 325 inlb 5 Connect the second DC cable of the Sunny Central as described above if required M The DC cable of the Sunny Central is connected Technical Description SSMUS TUSO9451 1 49 Electrical Connection SMA Solar Technology AG 7 6 Connecting Sunny Central positive grounding The Sunny Central may not be connected until the communication and the PV modules have been connected see section 6 Communication connector page 29 section 7 2 Connecting ground page 38 and section 7 4 Connecting the PV modules positive grounding page 44 1 DANGER
16. Description Start of monitoring for the Sunny Central String Monitor groups 1 to 6 These parameters will enable you to set the monitoring start times for each separate group The time is entered in 24 hour format Hours and minutes are separated by a dot E g for 10 30 a m enter 10 30 MoniTmGrAllOff 7 00 19 00 15 00 End of monitoring time for all the Sunny Central String Monitor groups This parameter will enable you to set the monitoring end time simultaneously for the parameters MoniTmGr1 Off thru MoniTmGr6Off The time is entered in 24 hour format Hours and minutes are separated by a dot E g for 3 00 p m enter 5 00 MoniTmGrAllOn 7 00 19 00 10 00 Start of monitoring time for all the Sunny Central String Monitor groups This parameter will enable you to set the monitoring start time simultaneously for the parameters MoniTmGr1 On thru MoniTmGr6On The time is entered in 24 hour format Hours and minutes are separated by a dot E g for 10 30 a m enter 10 30 Serial Serial number of the Sunny Central String Monitor Controller This parameter cannot be adjusted 68 Technical Description SMA Solar Technology AG Name Tm Adjustment range hhmmss Default setting Description Current time of the Sunny Central String Monitor Controller The time is displayed in 24 hour format hh hours mm minutes ss seconds
17. SSMUS TUSO9451 1 25 Mounting SMA Solar Technology AG 4 3 1 Mounting the Sunny Central String Monitor to a wall A Mounting bracket Two mounting rails are attached to the rear side of the Sunny Central String Monitor The mounting rail is i attached to the Sunny Central String Monitor right and left with nuts 1 Loosen the 4 nuts counterclockwise Remove nuts and washers they will be needed later 2 Lay the 4 mounting brackets on the threads of the mounting rails Lai 3 Slide the washers on the threads 4 Screw the nuts onto the threads and tighten clockwise with a torque of 89 in lb 10 Nm 5 Measure the distance for the holes 6 Mark the position of the drill holes 7 Drill holes at the marked positions 26 SSMUS TUSO94511 Technical Description SMA Solar Technology AG 8 Insert wall anchors into the drill holes 9 Attach the Sunny Central String Monitor to the wall using screws and washers 10 Tighten the screws clockwise using a torque of 133 indb 15 Nm M The Sunny Central String Monitor is now mounted to the wall Technical Description SSMUS TUSO9451 1 Mounting 27 Attaching the Cable Conduits SMA Solar Technology AG 5 Attaching the Cable Conduits NOTICE Infiltration of water during the mounting and installation of the product Damage to the product Do not open the Sunny Central String Monitor when it is r
18. Torque DC 350 kemil 325 inlb DC 350 kcmil 325 inlb Technical Description SSMUS TUS09451 1 47 Electrical Connection SMA Solar Technology AG 7 5 1 Sunny Central Connecting DC The DC cable of the Sunny Central is connected to the terminals A in the Sunny Central String Monitor 1 Strip the cable by approx 1 1 in 28 mm 2 Loosen the hexagon screw with a wrench counterclockwise 3 Put the hexagon screw and the washer aside 4 Pull the screw terminal from the rail 5 Open the screw terminal using a hexagon allen key counterclockwise 6 Insert the cable into the Sunny Central String Monitor as described in chapter 5 Attaching the Cable Conduits page 28 7 Plug the copper inner conductor of the cable into the screw terminal Tighten the screw terminal using an Allen key clockwise The required torque is 325 in lb Wire size Torque 350 kemil 325 inlb 9 Put the screw terminal on the rail 10 Put the washer on the screw terminal and the hexagon screw in the hole of the screw terminal 11 Tighten the hexagon screw using a wrench clockwise The required torque is 222 in b 12 Connect the second
19. all DC cables of the modules as described above K The DC cables of the PV modules are connected 42 SSMUS TUS09451 1 Technical Description SMA Solar Technology AG Electrical Connection 7 3 2 PV modules Connecting DC The DC cables of the PV modules are connected at the fuse holders A in the Sunny Central String Monitor Use 90 C 194 F copper wire for all DC wiring connections to the fuse holders 1 Open the screw terminal with a screwdriver counterclockwise 2 Strip the cable by approx 0 47 in 12 mm 3 Plug the copper inner conductor of the cable into the fuse holder 4 Tighten the screw in the fuse holder with a screwdriver clockwise The required torque is 19 in lb 2 2 Nm Wire size Torque Rigid wire 10 6 AWG 19 in lb 2 2 Nm Multistrand wire 10 8 AWG 5 Connect all DC cables of the modules as described above M The DC cables of the PV modules are connected A DANGER Risk of electric shock when working on the Sunny Central String Monitor with fuses closed Death or serious injuries DO NOT close the fuse holders Do not close the fuse holder until the PV system is put into operation Technical Description SSMUS TUSO9451 1 43 Electrical Connection SMA Solar Technology AG 7 4 Connecting the PV modules positive grounding The PV modules may not be connected until the communication
20. cables have been connected see section 6 Communication connector page 29 The Photovoltaic System Grounding shall be installed per the requirements of sections 690 41 through 690 47 of the National Electrical Code ANSI NFPA 70 and is the responsibility of the installer In Canada wiring methods shall be per the Canadian Electrical Code Part Il A DANGER Risk of electric shock when touching the DC cable attached to the PV module Death or serious injuries Voltage is present in PV modules exposed to light e Cover the PV modules e Follow all safety precautions of the module manufacturer Technical Data for the Connection of the PV Modules Version 24 Version 32 Version 64 Max number of strings 24 32 64 Max string short circuit 12 82 A 9 62A 5 12A current Technical Data for the Cables of the PV Modules Use 90 C 194 F copper wire for all DC wiring connections to the Sunny Central String Monitor Cables of PV Modules Cable Size Torque DC 6 4 AWG 45 indb 5 Nm 8 AWG AO in lb 4 5 Nm 10 AWG 35 indb 4 Nm DC Rigid wire 10 6 AWG 19 in lb 2 2 Nm Multistrand wire 10 8 AWG 44 SSMUS TUSO945 11 Technical Description SMA Solar Technology AG Electrical Connection 7 4 1 PV modules Connecting DC The DC cables of the PV modules are connected at the medium screw terminals A in the Sunny Central String
21. existing electrostatic charges by touching a grounded metal surface e g housing 7 1 Connection area Position A Description Rail for grounding the cable shield of the communication cable Technical Description SSMUS TUSO9451 1 37 SMA Solar Technology AG Electrical Connection Position Description B Negative grounding Screw terminals for DC of the PV generator Positive grounding Screw terminals for DC of the PV generator Use 90 C 194 F copper wire for all DC wiring connections to the fuse holders C Negative grounding Screw terminals for DC of the PV generator Positive grounding Screw terminals for DC of the PV generator D Screw terminals for grounding the PV generator E Terminal for grounding the DC cable of the Sunny Central F Negative grounding Terminal for DC of the Sunny Central Positive grounding Terminal f
22. for Sunny Central String Monitor Controller The following table lists the parameters displayed in the user and installer modes The parameters with a grey background are only visible in the installer mode Name Ackn Adjustment range quit Default setting Description Confirm errors and warnings manually Confirmation of a warning or error which has occurred in the Sunny Central String Monitor or the Sunny Central String Monitor Controller ComBaud 1200Baud A800Baud 9600Baud 19200Baud 38400Baud 57600Baud 19200 Speed of data transfer via the communication bus DevFunc 1 AutoDetect_SSMU DetectSSMURetry DelAll_SSMU Factory AutoDetect_SSMU Deletion of all detected and registered Sunny Central String Monitors and subsequent search for the Sunny Central String Monitors DetectSSMURetry Continue search for further Sunny Central String Monitors which have so far remained undetected DelAll_SSMU Deletion of all Sunny Central String Monitors registered in the Sunny Central String Monitor Controller Factory Set all the parameters visible in the installer mode back to default settings Dt yymmdd Current date of the Sunny Central String Monitor Controller yy year mm month dd day E g for July 4 2009 enter 070409 66 Technical Description SMA Solar Technology AG Name ErrlevGrl ErrlevGr6 Adjustment range
23. is referred to as Sunny Central String Monitor 1 1 Target Group This manual is for qualified personnel Qualified personnel has received training and has demonstrated skills and knowledge in the construction and operation of the device Qualified personnel is trained to deal with the dangers and hazards involved in installing electric devices 1 2 Area of Validity This manual is valid for the Sunny Central String Monitor US starting with fabrication version A The Sunny Central String Monitor US will be referred to as Sunny Central String Monitor in this manual This manual does not cover any details concerning PV modules Information concerning the PV modules is available from the manufacturer of the PV modules Technical Description SSMUS TUSO9451 1 11 Security SMA Solar Technology AG 2 Security 2 1 Appropriate Usage The Sunny Central String Monitor is a Smart Combiner Depending on the versions the box provides the possibility to directly connect 24 32 or 64 strings and to link them with the Sunny Central inverter All inputs are fused in compliance with NEC Additionally a high resolution string monitoring is integrated in the device It permanently measures and monitors the string current of all inputs and detects partial and total dropouts In case of failures and dropouts the responsible person is immediately informed via the WebBox Principle of a PV Power System with Sunny Central String Monitor A B
24. number of modules connected Communication method Serial number of the Sunny Central String Monitor Sunny Central failure or warning number Display message of the Sunny Central Address SMA America Incorporated 4031 Alvis Court Rocklin CA 95677 USA Tel 1 916 625 0870 Fax 1 916 625 0871 Service SMA America com www SMA America com 80 SSMUS TUSO9451 1 Technical Description SMA Solar Technology AG Contact Technical Description SSMUS TUSO9451 1 81 Contact SMA Solar Technology AG 82 SSMUS TUSO9451 1 Technical Description SMA America Incorporated
25. the given order Setting the Communication Type of the PV System To enable individual components to communicate with each other you must set the communication type as follows 1 Log into the Sunny WebBox as an installer 2 Set the communication type of the PV plant as described in the instructions for the Sunny WebBox Set the following values Interface SMA COM Baudrate 19200 Setting the communication type of the PV system is now complete Detecting the Sunny Central String Monitor Controller In order to fulfill the preconditions for communication it is necessary for the Sunny WebBox to detect the Sunny Central and the Sunny Central String Monitor Controller Do not yet detect the Sunny Central String Monitors 3 Detect the Sunny Central String Monitor Controller and the Sunny Central as described in the instructions to the Sunny WebBox Set the following values Total number of devices to be detected 2 1 Sunny Central and 1 Sunny Central String Monitor Controller M Detection of the Sunny Central String Monitor Controller and the Sunny Central is now complete Check Date and Time 4 Go to System gt Devices on the web interface 5 Select Sunny Central String Monitor Controller SCSMC in the device view 6 Select the tab Spot values 7 Check date and time of the Sunny Central String Monitor Controller Spot value of current date SysDt Spot value of current time Systm 8 If the spot value
26. 1 Open the Sunny Central as described in the Sunny Central installation guide 2 Prepare the data cable as described in section 6 1 Preparing the Data Cable page 30 Data Data and GND must be connected to the same wire as the last Sunny Central String Montior in the communication bus 3 Draw the data cable into the Sunny Central as described in the Sunny Central installation guide 4 Plug the plug to the 485 RJ45 clamp M The data cables are attached in the Sunny Central Technical Description SSMUS TUSO9451 1 35 Communication connector SMA Solar Technology AG 6 3 2 Grounding the Shield of the Data Cable The data cable shielding is fitted into the shielding clamp A of the 485 RJ45 clamp in the Sunny Central 5i p 1 Shorten the shielding to 0 6 in fold it back and attach it with conductive adhesive foil 2 Push the two cables portions of shielding reattached in this way into the shielding clamp M The shielding of the data cable is grounded 36 SSMUS TUSO9451 1 Technical Description SMA Solar Technology AG 7 Electrical Connection Electrical Connection NOTICE Electrostatic discharges possible when components are touched Damage to components e Follow ESD protective provisions e Remove
27. 9451 1 75 Technical Data 13 Technical Data PV generator connection data SMA Solar Technology AG measuring channel Version 24 Version 32 Version 64 Input voltage range 0 600 V DC 0 600 V DC 0 600 V DC Maximum array system 600 V DC 600 V DC 600 V DC voltage DC Maximum operating 20A 1 15A 4 8A 1 input current per string Maximum input short 12 8 A 9 647 51A circuit current Isc per string A DC Maximum input short 308 A DC 2 308 A DC 2 328 A DC 2 circuit current Isc total A DC Maximum fuse rating 20A 15A 8A 600 V DC 600 V DC 600 V DC Number of input circuits 24 32 64 Fused inputs per 3 4 8 Configuration PV array negative or positive negative or positive negative or positive grounded grounded grounded Measuring Channels 8 8 8 Operating 20 W 20 W 20 W Consumption 1 These values indicate input current without the derating factor 2 These values indicate input current with the derating factors o Sunny Central connection data s of NEC articles 690 8 A 1 and 690 8 B 1 applied NEC articles 690 8 A 1 and 690 8 B 1 applied output lines per potential Version 24 Version 32 Version 64 DC short circuit current 480 A 480 A 512A Maximum operating 308A 308A 328 A output current continous DC Maximum number of 2 2 2 76 SSMUS TUSO94511 Technical Description SMA Solar Technology AG Supply vo
28. Maintenance electrical connections Maintenance work Maintenance interval recommended Check all power cable connections for looseness and tighten them if 12 months necessary Check the connectors and insulation for discoloration or degradation Replace any damaged connectors or corroded contacts Check all string cable connections for looseness and replace them if 12 months necessary Check the connectors and insulation on the assembly and busbars for discoloration or degradation Checking the shield connection 24 months Checking the ground connection 12 months Maintenance housing Maintenance work Maintenance interval recommended Check that the Sunny Central String Monitor is mounted correctly 24 months Check the screw fitting seals and that they are tightly fastened and replace 12 months them if necessary Check whether there is condensation water in the device 12 months Check the installation location for accessibility combustible materials and 12 months that the device is securely positioned Check the adhesive warning labels and replace them if necessary 24 months Visual inspection of the housing for damage 12 months 54 SSMUS TUSO94511 Technical Description SMA Solar Technology AG 9 1 Replace fuses 9 1 1 Replace string fuses Maintenance and Cleaning NOTICE Risk of fire due to incorrectly dimensioned fuse Injuries due to fire following dimensions
29. NING WARNING indicates a hazardous situation which if not avoided could result in death or serious injury CAUTION CAUTION indicates a hazardous situation which if not avoided could result in minor or moderate injury NOTICE NOTICE indicates a situation that can result in property damage if not avoided 4 SSMUS TUS09451 1 Technical Description SMA Solar Technology AG Other Symbols In addition to the safety and hazard symbols described on the previous pages the following symbol is also used in this Installation Guide it Information This symbol accompanies notes that call attention to supplementary information that you should know and use to ensure optimal operation of the system Markings on this Product The following symbols are used as markings on this product with the following meanings Warning regarding dangerous voltage The product works with high voltages All work on the product may only be done as described in its documentation Beware of hot surface The product can become hot during operation Avoid coming into contact with the product during operation BY crn the operating instructions Read the product s documentation before working on it Follow all safety lt precautions and instructions as described in the documentation ZZ DC current Earth Ground Technical Description SSMUS TUSO9451 1 5 SMA Solar Technology AG General Warnings General Wa
30. Sensitive Regular Insensitive Customer Default setting Regular Description Adjusting the string current monitoring system Here you can set the monitoring parameters for each individual group Firmware Firmware version of the Sunny Central String Monitor Controller This parameter cannot be adjusted Firmware2 Kernel version of the Sunny Central String Monitor Controller This parameter cannot be adjusted MoniTmComOff 6 00 20 00 15 00 Time at which the daily communication with the Sunny Central String Monitors stops The time is entered in 24 hour format Hours and minutes are separated by a dot E g for 6 30 p m enter 18 30 MoniTmComOn 6 00 20 00 10 00 Time at which the daily communication with the Sunny Central String Monitors starts The time is entered in 24 hour format Hours and minutes are separated by a dot E g for 10 30 a m enter 10 30 MoniTmGr1 Off MoniTmGr6Off 7 00 19 00 15 00 End of monitoring for the Sunny Central String Monitor groups 1 to 6 These parameters will enable you to set the monitoring end times for each separate group The time is entered in 24 hour format Hours and minutes are separated by a dot E g for 3 00 p m enter 15 00 Technical Description 67 SMA Solar Technology AG Name MoniTmGr1 On MoniTmGr6On Adjustment range 7 00 19 00 Default setting 10 00
31. Version 24 max 20 A rated current Version 32 max 15 A rated current Version 64 max 8 A rated current e For continuous protection only replace with a fuse of the same type and size e Only use 10x 38 Class CC fuses from the company Ferraz Type ATMR with the The fuse holders are positioned at the right and left side C of the Sunny Central String Monitor 1 Open the Sunny Central String Monitor as described in section 10 1 Opening Sunny Central String Monitor page 58 2 Open the fuse holder Technical Description SSMUS TUSO9451 1 55 Maintenance and Cleaning SMA Solar Technology AG 3 Pull the fuse out of the fuse holder 4 Insert the new fuse into the fuse holder Close the fuse holder Close the Sunny Central String Monitor as described in section 10 2 Closing the Sunny Central String Monitor page 59 M The fuse is replaced 56 SSMUS TUSO9451 1 Technical Description SMA Solar Technology AG Maintenance and Cleaning 9 1 2 Replace Fuse from Electronic Board NOTICE Risk of fire due to incorrectly dimensioned fuse Injuries due to fire e For continuous protection only replace with a fuse of the same type and size
32. able by approx 0 3 in 8 mm 2 Open the screw terminal with a screwdriver counterclockwise 3 Plug the copper inner conductor of the cable into the screw terminal 4 Tighten the screw terminal with a screwdriver clockwise Required torques Wire size Torque 6 4 AWG 45 in lb 5 Nm 8 AWG AO in lb 4 5 Nm 10 AWG 35 intb 4 Nm om Connect all grounding cables of the modules as described above M The PV modules are grounded Technical Description SSMUS TUSO9451 1 39 Electrical Connection SMA Solar Technology AG 7 2 2 Sunny Central Connecting ground The grounding cable of the Sunny Central is connected to the terminals A in the Sunny Central String Monitor oak WN gt 10 11 12 40 Strip the cable by approx 1 1 in 28 mm Loosen the nut with a wrench counterclockwise Put the nut and the washer aside Pull the screw terminal from the threaded bolt Open the screw terminal with a hexagon allen key counterclockwise Insert the cable into the Sunny Central String Monitor as described in chapter 5 Attaching the Cable Conduits page 28 Plug the copper inner conductor of the cable into the screw terminal T
33. aining or when there is very high humidity gt 95 e For conduit hubs use only UL Listed rainproof or wet location hubs complying with UL 514B for entry into the enclosure The cables of the Sunny Central and the PV generator can be routed into the Sunny Central String Monitor from left right or bottom The communication cables can be routed into the Sunny Central String Monitor from left or right Metal plates are attached to the Sunny Central String Monitor for this purpose The plates can be removed in order to punch the holes for the cable conduits A Cable gland for e Communication B Cable gland for e Cable of the PV generator e Cables of the Sunny Central 1 Check which position is the best for routing the cable example The Sunny Central is on the right side of the Sunny Central String Monitor The right side of the Sunny Central String Monitor can be used for routing the cables Loosen nuts at the metal plates to be used Put the nuts aside Punch holes for the cable conduits into the plates Attach plates to the Sunny Central String Monitor on Rk WON Tighten the screws with a torque of 22 indb 2 5 Nm Insert the conduits into the openings Attach the cable conduits with the appropriate screws 28 SSMUS TUSO945 11 Technical Description SMA Solar Technology AG Communication connector 6 Communication connector The communication between the Sunny Central String Monito
34. ction process 17 Set parameter DevFunc to DetectSSMURetry 18 Select Save MI The Sunny Central String Monitor Controller starts over with the detection of all the Sunny Central String Monitors Detection of the entire system by the Sunny WebBox The Sunny WebBox must detect the entire system i e the Sunny Central the Sunny Central String Monitor Controller and the Sunny Central String Monitors 19 Detect the Sunny Central String Monitor Controller and the Sunny Central as described in the instructions to the Sunny WebBox Set the following values Total number of communication units spot value reading SS MUNoOf 2 more devices Sunny Central and Sunny Central String Monitor Controller M Detection of the Sunny Central String Monitors the Sunny Central and the Sunny Central String Monitor Controller is now complete The Sunny WebBox now displays the Sunny Central String Monitors in the device view Adjusting the group allocation of the Sunny Central String Monitors 20 Select the Sunny Central String Monitor SSM US in the device view 21 Select the Parameters tab Technical Description SSMUS TUSO9451 1 71 Operation of the Sunny Central String Monitor SMA Solar Technology AG 22 Via the parameter SSMId allocate a unique identification number to each Sunny Central String Monitor Each Sunny Central String Monitor must have its own individual identification number 23 Make a note of the identification
35. e Check communication wiring e Check operating mode of the Sunny Central String Monitor If the Sunny Central String Monitor is switched off no communication can take place e Check monitoring period 12 1 2 Detecting errors with the Sunny Central String Monitor 1 Go to System gt Devices on the web interface 2 Select the Sunny Central String Monitor SSM US in the list 3 Select the tab Spot values 4 Select the spot value Error 5 Compare the spot value Error message with the following table and eliminate the warning Display Meaning EvtEe Error The Sunny Central String Monitor does not display the measured values correctly Please contact the SMA Serviceline see Section 14 Contact page 80 12 2 Confirm warning Confirm the warning message via the Sunny WebBox You will find detailed operating instructions for the Sunny WebBox in the technical description of the Sunny WebBox RON NHNG amp Y Eliminating errors in the PV system see Section 12 Troubleshooting page 74 Log into the Sunny WebBox as an installer Select Sunny Central String Monitor Controller SCSMC in the device list Select the Parameters tab M The browser displays the list of parameters for the Sunny Central String Monitor Controller Select parameter Ackn Select quit in the drop down menu Select Save The warning is now confirmed Technical Description SSMUS TUSO
36. ector Sunny Central String Monitor 32 Technical Description SSMUS TUSO9451 1 7 Table of Contents SMA Solar Technology AG 6 2 1 6 2 2 6 2 3 6 3 6 3 1 6 3 2 7 1 7 2 7 2 1 7 2 2 7 3 7 3 1 7 3 2 7 4 7 4 1 7 4 2 7 5 7 5 1 7 5 2 7 6 7 6 1 7 6 2 9 1 9 1 1 9 1 2 10 Connecting the Data Cable in the Sunny Central String Monitor 33 Grounding the Shield of the Data Cable 00000 200s 34 Terminate the RS485 bus in the Sunny Central String Monitor 34 Communication Connector Sunny Central 35 Connecting the Data Cable in the Sunny Central 00 35 Grounding the Shield of the Data Cable 00000 ee ee 36 Electrical Connection c cee ee eee cece eee 37 Connection Gleaid vase ten Rae oe kas 37 Connecting ground n no twawets Moan eeui uid 38 PV modules Connecting ground 00 eee eee eee eee 39 Sunny Central Connecting ground eee eee eee 40 Connecting PV modules negative grounding 41 PV modules Connecting DC ouu 0 eurrera rerne eee A2 PV modules Connecting DCF 2 cece eens 43 Connecting the PV modules positive grounding 44 PV modules Connecting DC 0 0 narrer errereen A5 PV modules Connecting DC 06 eee eee 46 Connecting Sunny Central negative grounding 47 Sunny Central Connecting DC naaus aaaeeeaa aeaa 48 Sunny Central Connecti
37. eld onto the shield rail 2 Put the shield clamp G on the shield of the data cable and connect it with the shield rail H 3 Hand tighten the screw at the shield clamp 4 4 in Ib 0 5 Nm 4 Close the Sunny Central String Monitor M The data cable is grounded 6 2 3 Terminate the RS485 bus in the Sunny Central String Monitor Only set the termination if the Sunny Central String Monitor is at the end of the RS485 communication bus The termination is made using a termination resistor plug The termination resistor plug is included 3 Close the Sunny Central String Monitor bz EEN 1 Opening the Sunny Central String Monitor 2 Set the termination resistor plug in the free socket in the Sunny Central String Monitor 34 SSMUS TUSO9451 1 Technical Description SMA Solar Technology AG Communication connector 6 3 Communication Connector Sunny Central NOTICE Disregarding the proper order when connecting the communication bus Damage to the communication bus e Only connect the data cable in the Sunny Central after all Sunny Central String Monitors are connected to the communication bus see section 6 2 Communication Connector Sunny Central String Monitor page 32 6 3 1 Connecting the Data Cable in the Sunny Central The data cable is attached with a plug to the 485 RJ45 clamp in the Sunny Central
38. er ParaCfg displays the message WrnMoniTmCom this means that the times for MoniTmComOn or MoniTmComOf have been set incorrectly see Section Adjusting the parameters of the Sunny Central String Monitor Controller page 70 Setting of the monitoring period is now complete Setting the PV plant monitoring system is now complete 11 6 3 Allocation of PV strings to groups 1 ak wN A Log into the Sunny WebBox as an installer Go to System gt Devices on the web interface Select the Sunny Central String Monitor SSM US in the list Select the Parameters tab Using parameter GrChO GrCh allocate all strings of the Sunny Central String Monitors to a group The Sunny Central String Monitor does not monitor groups of less than 4 strings The allocation of PV strings to groups is now complete Technical Description SSMUS TUSO9451 1 73 Troubleshooting SMA Solar Technology AG 12 Troubleshooting 12 1 Detection and Elimination of Faults By means of the Sunny WebBox you can look at the spot value Error for the Sunny Central String Monitor Controller or the Sunny Central String Monitor These spot values indicate that errors have occurred 12 1 1 Detecting errors with the Sunny Central String Monitor Controller 1 Log into the Sunny WebBox as an installer 2 Go to System gt Devices on the web interface 3 Select the Sunny Central String Monitor Controller SCSMC in the list 4 Select the
39. he fuse holders 13 1 1 Negative Grounding PV module connections Cables of the PV modules Cable Size Torque DC Rigid wire 10 6 AWG 19 5 in lb 2 2 Nm Multistrand wire 10 8 AWG DC 6 4 AWG 45 indb 5 Nm 8 AWG AO in lb 4 5 Nm 10 AWG 35 indb 4 Nm Ground 6 4 AWG 45 in lb 5 Nm 8 AWG AO in lb 4 5 Nm 10 AWG 35 indb 4 Nm Connection Sunny Central Cables to the Sunny Central Cable Size Torque DC 350 kemil 325 in lb DC 350 kemil 325 in lb Ground 350 kemil 325 in lb 13 1 2 Positive grounding PV module connections Cables of the PV modules Cable Size Torque DC 6 4 AWG 45 indb 5 Nm 8 AWG AO in lb 4 5 Nm 10 AWG 35 indb 4 Nm DC Rigid wire 10 6 AWG 19 5 in lb 2 2 Nm Multistrand wire 10 8 AWG Ground 6 4 AWG 45 in lb 5 Nm 8 AWG AO in lb 4 5 Nm 10 AWG 35 indb 4 Nm 78 SSMUS TUSO94511 Technical Description SMA Solar Technology AG Connection Sunny Central Technical Data Cables to the Sunny Central Cable Size Torque DC 350 kemil 325 in lb DC 350 kcmil 325 in lb Ground 350 kemil 325 in lb Technical Description SSMUS TUSO945 11 79 Contact SMA Solar Technology AG 14 Contact If you have technical problems concerning our products contact the SMA Service Line We require the following information in order to provide you with the necessary assistance Inverter type Type and
40. ighs 143 lbs 65 kg version 32 weighs 146 Ibs 66 kg version 64 weighs 194 lbs 88 kg The mounting location must be suitable for the weight of the Sunny Central String Monitor The Sunny Central String Monitor may not be mounted to plasterboard walls or similar _ E E 9 E X re 2 sas oO g a g D le M re 1s in i oh N 3 a aS 00 QP ot laon P EADE mm O 80 An WP 0 m J ye 4 1 3 Minimum Clearance Keep a clearance of at least 60 in 1 500 mm to walls other devices or similar This clearance is necessary in order to allow to insert the cables to the Sunny Central String Monitor and open the Sunny Central String Monitor Clearances The National Electrical Code may require significantly larger working clearances see NEC Section 110 26 Technical Description 18 SSMUS TUSO945 11 SMA Solar Technology AG Mounting 4 1 4 Permissible Slanting The Sunny Central String Monitor must be mounted vertically _ lt LZ Z e Never install the device with a backward tilt e Never install the device with a forward tilt Do not install horizontally 4 1 5 Mounting to PV Module Racks The Sunny Central String Monitor can be mounted to the back of module racks It is not permitted to be mounted in a location where rainwater will flow over the Sunny Central String Monitor The image below schematically illustrates how the S
41. ighten the screw terminal using a hexagon allen key clockwise The required torque is 325 in lb Wire size Torque 350 kemil 325 in lb Put the screw terminal on the threaded bolt Put the washer and the nut on the threaded bolt Tighten the nut using a wrench clockwise The required torque is 222 in lb Connect the second grounding cable of the Sunny Central as described above The ground cable of the Sunny Central is connected SSMUS TUSO9451 1 Technical Description SMA Solar Technology AG Electrical Connection 7 3 Connecting PV modules negative grounding The PV modules may not be connected until the communication cables have been connected see section 6 Communication connector page 29 The Photovoltaic System Grounding shall be installed per the requirements of sections 690 41 through 690 47 of the National Electrical Code ANSI NFPA 70 and is the responsibility of the installer In Canada wiring methods shall be per the Canadian Electrical Code Part Il A DANGER Risk of electric shock when touching the DC cable attached to the PV module Death or serious injuries Voltage is present in PV modules exposed to light e Cover the PV modules e Follow all safety precautions of the module manufacturer Technical Data for the Connection of the PV Modules Version 24 Version 32 Version 64 Max number of strings 24 32 64 Max string short circuit 12 82 A 9 62A 5 13 A current
42. key counterclockwise oak w amp Insert the cable into the Sunny Central String Monitor as described in chapter 5 Attaching the Cable Conduits page 28 Plug the copper inner conductor of the cable into the screw terminal Tighten the screw terminal using an Allen key clockwise The required torque is 325 in lb Wire size Torque 350 kemil 325 inlb 9 Put the screw terminal on the rail 10 Put the washer on the screw terminal and the hexagon screw in the hole of the screw terminal 11 Tighten the hexagon screw using a wrench clockwise The required torque is 222 in lb 12 Connect the second DC cable of the Sunny Central as described above M The DC cable of the Sunny Central is connected Technical Description SSMUS TUSO9451 1 51 Electrical Connection SMA Solar Technology AG 7 6 2 Sunny Central Connecting DC The DC cable of the Sunny Central is connected to the terminals C in the Sunny Central String Monitor 1 Strip the cable by approx 1 1 in 28 mm 2 Open the screw terminal with an Allen key counterclockwise 3 Plug the copper inner conductor of the cable into the screw terminal 4 Tighten the screw terminal using an Allen key The required torque is
43. lockwise direction with a torque of 89 in lb CAUTION Protruding bolts may occur during the mounting of the Sunny Central String Monitor to a small diameter pole Abrasions caused by contact with protruding bolts 7 Shorten the bolts Remove the sharp edges on the bolts using a deburring tool M The Sunny Central String Monitor is mounted to a pole round Technical Description SSMUS TUSO9451 1 23 Mounting SMA Solar Technology AG 4 3 Mounting to a Wall Make sure that the wall you choose to mount the Sunny Central String Monitor on is sturdy enough to support its weight 143 Ibs 65 kg 146 Ibs 66 kg or 194 Ibs 88 kg over a long period of time and that the wall is plump The Sunny Central String Monitor may also be mounted on stone brick solid walls or wooden stud walls Use the mounting brackets for mounting on walls Be sure to use appropriate type of mounting hardware for the wall material and ensure that the hardware is no smaller than 1 4 in 1 DANGER Risk of electric shock by drilling into power cables Death or serious injuries e Check installation location for power cables CAUTION Falling of the Sunny Central String Monitor may cause injuries Crushing of body parts possible e Ensure that there are studs in the wall at the places where you intend to drill the mounting holes Do not use molly or toggle bolts to m
44. lt communication period is set from 10 00 hours 10 00 a m to 15 00 hours 3 00 p m The Sunny Central String Monitors are supplied with energy from the PV panel If for example the Sunny Central String Monitor Controller tries to communicate with the Sunny Central String Monitors during the night they will be unable to respond The Sunny Central String Monitor Controller will generate an error report Monitoring Period Time period during which the Sunny Central String Monitor Controller monitors the Sunny Central String Monitors Upon leaving our factory the default monitoring period is set from 10 00 hours 10 00 a m to 15 00 hours 3 00 p m At night when the PV plant is not producing any power the Sunny Central String Monitor Controller and the Sunny Central String Monitors are unable to communicate with each other 60 SSMUS TUSO945 11 Technical Description SMA Solar Technology AG Operation of the Sunny Central String Monitor 11 2 Communication Overview Position Description Sunny Display Sunny Central Control Unit Sunny WebBox Sunny Central String Monitor Controller SCSMC Sunny Central 485Hub Sunny Central String Monitor SSM US TM OL O gt Technical Description SSMUS TUSO94511 61 Operation of the Sunny Central String Monitor SMA Solar Technology AG 11 2 1 Status Display Sunny Central String Monitor LED Overview
45. ltage assembly Technical Data Operational voltage 250 600 V DC Maximum fuse size 1 10 A 600 V DC Mechanical Data Version 24 Version 32 Version 64 Dimensions W x H x D inch 31 5 x 31 5 x 9 84 31 5x31 5x9 84 31 5 x 47 24 x 11 81 mm 800 x 800 x 250 800 x 800 x 250 800 x 1 200 x 300 Weight 143 Ibs 65 kg 146 lbs 66 kg 194 lbs 88 kg Enclosure rating NEMA 3R NEMA 3R NEMA 3R Type of housing Steel or stainless steel Steel or stainless steel Steel or stainless steel Ambient Conditions Ambient temperature 13 113 F 25 45 C Maximum air ambient 113 F 45 C Rel humidity up to 95 condensation possible Maximum height above 3 280 ft 1000 m sea level NHN Communication RS485 interface as standard communication cable Maximum diameter for 0 315 in 8 mm the shield of the communication cable Dimensions of the 2x2 AWG 24 General Certified in accordance with UL 1741 EMC compliant according to FCC Technical Description SSMUS TUSO945 11 77 Technical Data 13 1 Torques and Cable sizes Use 90 C 194 F copper wire for all DC wiring connections to the screw terminals between PV modules and Sunny Central String Monitor e Sunny Central String Monitor and Sunny Central SMA Solar Technology AG Use 90 C 194 F copper wire for all DC wiring connections to t
46. mmunication bus If the Sunny Central String Monitor is within the communication bus two communication cables must be attached to the the Sunny Central String Monitor Two sockets are present in the Sunny Central String Monitor for this purpose 32 SSMUS TUSO9451 1 Technical Description SMA Solar Technology AG Communication connector 6 2 1 Connecting the Data Cable in the Sunny Central String Monitor 1 Open the Sunny Central String Monitor Prepare the data cable as described in section 6 1 Preparing the Data Cable page 30 Draw the data cable into the Sunny Central String Monitor see section 5 Attaching the Cable Conduits page 28 4 Connect the plug with one of the sockets of the Sunny Central String Monitor 5 Repeat the procedure for all data cables GND 2 Data 3 and Data 4 must be connected to the same wire M The data cables are attached in the Sunny Central String Monitor Technical Description SSMUS TUSO9451 1 33 Communication connector SMA Solar Technology AG 6 2 2 Grounding the Shield of the Data Cable The shield of the data cable is placed on the shield rail F in the Sunny Central String Monitor 1 Put the cable shi
47. ng DC 0 0 eee ee 49 Connecting Sunny Central positive grounding 50 Sunny Central Connecting DCH 2 0 00 51 Sunny Central Connecting DC 0 2 eee 52 COMMISSIONING 55 5 new 5 2 5 kee arg snow ies BE 2 Soe 53 Maintenance and Cleaning eeeeeeeeee 54 Replace fuses ee dia i eee Bin laseiin ee eed oR es 55 Replace string tuseSs acca danveeneden thd bd ie AA aa eee sien 55 Replace Fuse from Electronic Board 2 2 0 0 0 cee eee e eee eee ees 57 Opening and Closing ccc ec eeeee eens 58 SSMUS TUSO9451 1 Technical Description SMA Solar Technology AG 10 1 10 2 11 11 1 11 2 11 2 1 11 2 2 11 3 11 3 1 11 3 2 11 4 11 4 1 11 4 2 11 5 11 6 11 6 1 11 6 2 11 6 3 12 12 1 12 1 1 12 1 2 12 2 13 13 1 13 1 1 13 1 2 14 Opening Sunny Central String Monitor o o anaana 58 Closing the Sunny Central String Monitor 59 Operation of the Sunny Central String Monitor 60 Terms and Definitions ty ygues a4 dpa eek wks 60 Communication Overview 0 000 eee ee eee l Status Display Sunny Central String Monitor 0 eee eee 62 Status Display Sunny Central String Monitor Controller 63 Spot Values J sastrndee dash hacdnicteted JM hdd Oe dhicedetoled dda 64 Spot values Sunny Central String Monitor Controller 64 Spot values Sunny Central String Monitor 02 eee ee eens 65 Parame
48. nput 1 8 64 SSMUS TUSO945 11 Technical Description SMA Solar Technology AG Operation of the Sunny Central String Monitor Name SSMUWrnTxt Description Error message in text format Display format SMU SSMUlId Chan x SSMUld identification number of the Sunny Central String Monitor x number of the faulty string current channel 1 to 8 SysDt Current system date Display format mm dd yy mm month dd day yy year SysTm Current system time System time is displayed in 24 hour format Display format hh mm ss hh hours mm minutes ss seconds 11 3 2 Spot values Sunny Central String Monitor Name ComQ Description Communication quality Low bad quality of communication Good good quality of communication Excellent very good quality of communication CurCh1 CurCh8 Mean value of electricity present in the respective canal Error Warning on Sunny Central String Monitor see Section 12 Troubleshooting page 74 Mode Operating mode of the Sunny Central String Monitor 11 4 Parameters Recalling parameters 1 Log into the Sunny WebBox 2 Go to System gt Devices on the web interface 3 Select Sunny Central String Monitor Controller SCSMC or Sunny Central String Monitor SSM US from the list 4 Select the Parameters tab Technical Description SSMUS TUSO945 11 65 SMA Solar Technology AG 11 4 1 Parameters
49. numbers allocated to the serial numbers of the Sunny Central String Monitors M Adjustment of the group allocation of the Sunny Central String Monitors is now complete 11 6 Optional Settings for the PV plant Monitoring System 11 6 1 Setting the communication period of Sunny Central String Monitors The communication period is the time period during which the Sunny Central String Monitor Controller communicates with the Sunny Central String Monitors Upon leaving our factory the default communication period is set from 10 00 hours 10 00 a m to 15 00 hours 3 00 p m If you want to change the communication period follow the instructions below Setting the communication period of all Sunny Central String Monitors 1 Set the parameter MoniTmComOn to the monitoring start time Set the parameter MoniTmComOff to the monitoring end time Select Save 2 3 M Setting the communication period of all Sunny Central String Monitors is now complete Check the monitoring period settings according to the instructions below 11 6 2 Setting the monitoring period of Sunny Central String Monitors You can set the monitoring period of the Sunny Central String Monitors via the parameters of the Sunny Central String Monitor Controller You can set the monitoring period for all the Sunny Central String Monitors or allocate a separate monitoring period to each group of Sunny Central String Monitors Selecting the monitoring period The monito
50. olts and tighten in a clockwise direction M The Sunny Central String Monitor is mounted on a square pole Technical Description SSMUS TUSO9451 1 21 Mounting SMA Solar Technology AG 4 2 2 Mounting the Sunny Central String Monitor to a pole round The Sunny Central String Monitor can be mounted to a square or round pole An installation kit for pole mounting is included in the Sunny Central String Monitor accessories kit This section describes mounting to a round pole A Pole mount B Threaded bolt C Nuts D Washers See Dimensions of the round pole The Sunny Central String Monitor can be mounted on round poles with the following dimensions e minimum 3 94 in 100 mm e maximum 7 48 in 190 mm Two mounting rails are attached to the rear side of the Sunny Central String Monitor In the middle of the mounting rails there are 2 internal threads for attaching the pole mount 1 Securely screw the 4 threaded bolts into the internal threads of the mounting rail in a clockwise direction 2 _ Lift the Sunny Central String Monitor to the mounting position on the pole 22 SSMUS TUSO945 11 Technical Description SMA Solar Technology AG Mounting 3 Slide pole mounts top and bottom with the V opening on the threaded bolts 4 Slide washers onto the threaded bolts Screw the nuts onto the threaded bolts Tighten the nuts in a c
51. onitor SMA Solar Technology AG 11 3 Spot Values Recalling spot values 1 Log into the Sunny WebBox as an installer 2 Go to System gt Devices on the web interface 3 Select Sunny Central String Monitor Controller SCSMC or Sunny Central String Monitor SSM US from the list 4 Click the spot values tab 11 3 1 Spot values Sunny Central String Monitor Controller Name Description Error Warning indicator Sunny Central String Monitor Controller see Section 12 2 Confirm warning page 75 h On Total hours in operation MeanCurGr1 Mean value of electricity generated by the respective group MeanCurGr6 Mode Operating mode of the Sunny Central String Monitor Controller e Operation e Warning e Disturbance e Error ParaCfg Ok The configuration is in order WrnMoniTmCom end time of the communication period is before the start time WrnMonilmGr at least one end time in a given group is before the respective start time SSMUIntDatTm Display of the time duration for one complete communication cycle between the Sunny Central String Monitor Controller and the connected Sunny Central String Monitors SSMUNoOf Number of Sunny Central String Monitors found SSMUWrnCode If a string failure is recognized the following values are indicated e Identification number of the Sunny Central String Monitor e First position after the decimal point the number of the current measurement i
52. or DC of the Sunny Central G Negative grounding Terminal for DC of the Sunny Central Positive grounding Terminal for DC of the Sunny Central 7 2 Connecting ground The PV modules may not be connected until the communication cables have been connected see section 6 Communication connector page 29 The Photovoltaic System Grounding shall be installed per the requirements of sections 690 41 through 690 47 of the National Electrical Code ANSI NFPA 70 and is the responsibility of the installer In Canada wiring methods shall be per the Canadian Electrical Code Part Il Use 90 C 194 F copper wire for all wiring connections to the Sunny Central String Monitor 1 DANGER Risk of electric shock when touching the DC cable attached to the PV module Death or serious injuries Voltage is present in PV modules exposed to light Cover the PV modules e Follow all safety precautions of the module manufacturer 38 SSMUS TUSO945 11 Technical Description SMA Solar Technology AG Electrical Connection 7 2 1 PV modules Connecting ground The PV modules are grounded at the lower screw terminals A in the Sunny Central String Monitor 1 Strip the c
53. ount the Sunny Central String Monitor to sheet rock or panelling Information for mounting 1 The diameter of the holes you drill must match the hardware you are using to mount the Sunny Central String Monitor For example if you are mounting the Sunny Central String Monitor to a concrete wall the hole diameter should be approximately the same as the outside diameter of the concrete anchors you intend to use If you are mounting the Sunny Central String Monitor on a wall that has wooden studs inside it the hole diameter should be the correct size for the lag screws you intend to use to mount the bracket It is recommended that the lag screws be made of stainless steel and the diameter of the screws closely match the diameter of the holes in the wall mounting bracket Make sure that the screws are long enough to penetrate the wall to a depth of 1 5 in 24 SSMUS TUSO945 11 Technical Description SMA Solar Technology AG Mounting Distance of the holes 32 28 in 820 mm 32 28 in 820 mm RK A N o N N 3 3 3 N Q 3S 3 3 Used mounting material i Attaching to the Sunny Central String Monitor Screws 1 4 stainless steel screws Attaching to the wall Screws 5 16 wood screw length 2 Wall anchor 3 8 Technical Description
54. ring period must never be outside the time period set for the Sunny Central String Monitors to communicate with the Sunny Central String Monitor Controller This time period can be set via the parameter MoniTmComOn and MoniTmComOff Setting the monitoring period of all Sunny Central String Monitors 1 Set parameter MoniTmGrAllOn to the monitoring start time 2 Set parameter MoniTmComOft to the monitoring end time 3 Select Save Setting the monitoring period of all Sunny Central String Monitors is now complete Check the monitoring period settings according to the instructions below 72 SSMUS TUSO94511 Technical Description SMA Solar Technology AG Operation of the Sunny Central String Monitor Setting the monitoring period for individual groups of Sunny Central String Monitors 1 2 Set parameter MoniTmGr1 On thru MoniTmGr6On to the monitoring start time Set parameter MoniTmGr 1 Off thru MoniTmGr6Oft to the monitoring end time Select Save Setting the monitoring period for the groups of Sunny Central String Monitors is now complete Check the monitoring period settings according to the instructions below Checking the monitoring period l 2 M Select the tab Spot values Check spot value ParaCfg If parameter ParaCfg displays the message WrnMoniTmGr this means that the end of the monitoring period of the particular group is before the beginning of the monitoring period If paramet
55. rnings All electrical installations must be done in accordance with the local and National Electrical Code ANSI NFPA 70 In Canada wiring methods shall be per the Canadian Electrical Code Part Il The Sunny Central String Monitor contains no user serviceable parts For all repair and maintenance always contact an authorized SMA Service Center Before installing or using the Sunny Central String Monitor read all of the instructions cautions and warnings on the Sunny Central String Monitor the PV array in this Installation Guide and in User Manual PV arrays produce electrical energy when exposed to light and thus can create an electrical shock hazard Wiring of the PV arrays shall only be performed by qualified personnel This product is intended for operation in an environment having a maximum ambient temperature of 113 F 45 C The DC ouput terminals shall be connected using the following wire types Copper an copper clad conductors only use No 350 kemil copper wire The DC input wires Fuse holder shall be connected using the following wire types Rigid wire 10 6 AWG Multistrand wire 10 8 AWG The Input wire Busbar shall be connected using the following wire types 10 4 AWG 6 SSMUS TUS09451 1 Technical Description SMA Solar Technology AG Table of Contents Table of Contents 1 1 1 1 2 2 2 1 2 2 3 3 1 3 2 3 3 4 4 1 4 1 1 4 1 2 4 1 3 4 1 4 4 1 5 4 2 4 2 1 4 2 2 4 3 4 3 1
56. rs and the Sunny Central is provided using a RS485 The Sunny Central String Monitors are connected to the Sunny Central within a bus in series The bus may not be longer than 4 000 ft 1 200 m in total Connection of up to 4 hubs for the connection of 4 buses possible see section 11 2 Communication Overview page 61 The last Sunny Central String Monitor in the bus and the Sunny Central must be terminated see section 6 2 3 Terminate the RS485 bus in the Sunny Central String Monitor page 34 and section 7 Electrical Connection page 37 4 000 ft Data cable Use a shielded twisted pair data cable with a cross section of 2 x 2 x AWG 24 A B C D Flexible PVC insulation Shielding copper shielding braid Twisted Pair 1 2 x AWG 24 Twisted Pair 2 2 x AWG 24 Recommendation data cable SMA also provides communication cables Please contact your installer or wholesaler Technical Description SSMUS TUSO9451 1 29 Communication connector SMA Solar Technology AG 6 1 Preparing the Data Cable Three wires of the data cable GND 2 Data 3 and Data 4 are required for the connection Data and Data must be a twisted pair 1 Remove the insulation of the data cable by approx 2 4 in 60 mm and uncover the shield Uncover the wires by approx 1 8 in 45 mm Strip the wires by approx 0 2 in 1 8 mm 2 4 in 60 mm lt gt ieee 0 6 in 15 mm 3 6 in
57. s for SysDi and SysTm are incorrect change the parameters Di and Tm see following Section Adjusting the parameters of the Sunny Central String Monitor Controller 9 Select the Parameters tab 10 If the spot value for SysDt is incorrect alter the Dt parameter to the current date 11 If the spot value for SysTm is incorrect alter the Tm parameter to the current time 12 Select Save 70 SSMUS TUSO9451 1 Technical Description SMA Solar Technology AG Operation of the Sunny Central String Monitor M Adjustment of the parameters of the Sunny Central String Monitor Controller is now complete Detecting the Sunny Central String Monitors via the Sunny Central String Monitor Controller 13 Set parameter DevFunc to AutoDetect_SSMU 14 Select Save M The Sunny Central String Monitor Controller starts with the detection of all the Sunny Central String Monitors F Detecting the Sunny Central String Monitors can take several minutes 1 Depending on the number and distance of devices from each other the duration of the detection process can differ 15 Select the tab Spot values 16 Check the number of Sunny Central String Monitors detected in the spot value for SSMUNoOf M Detection of the Sunny Central String Monitors by the Sunny Central String Monitor Controller is now complete or If the Sunny Central String Monitor Controller has not detected all the Sunny Central String Monitors restart the dete
58. se holders and lay them aside M The Sunny Central String Monitor is opened 58 SSMUS TUSO945 11 Technical Description SMA Solar Technology AG Opening and Closing 10 2 Closing the Sunny Central String Monitor 1 Reinsert the fuses into the fuse holders 1 Close the fuse holders 2 Close the Sunny Central String Monitor Commission the Sunny Central as described in the Sunny Central Installation Guide 4 Remove the cover of the PV modules M The Sunny Central String Monitor is closed Technical Description SSMUS TUSO9451 1 59 Operation of the Sunny Central String Monitor SMA Solar Technology AG 11 Operation of the Sunny Central String Monitor The Sunny Central String Monitor cannot be operated unless there is a Sunny WebBox connected to the Sunny Central You will find operating instructions for the Sunny WebBox in the technical description of l the Sunny WebBox 11 1 Terms and Definitions Accuracy Adjusting sensitivity by varying the triggering threshold e sensitiv e regular insensitiv Creating Groups A group is made up of several PV strings For instance you can create a group of PV strings connected to inverters which are shaded during the morning This will result in similar measurements for the whole group Communication Period Time period during which the Sunny Central String Monitor Controller communicates with the Sunny Central String Monitors Upon leaving our factory the defau
59. tab Spot values 5 Select the spot value Error If the spot value Error displays an alert compare the message with the following table and eliminate the error If the spot value Error does not display any warning go on to next point Display Meaning Corrective measures gt Warning 380 Astring is not reaching the Check which Sunny Central String lt Warning 380 normal current String failure or Monitor is faulty see spot value error trigger SSMUWrnCode in Section 11 3 1 Spot values Sunny Central gt Incoming warning String Monitor Controller page 64 lt Outgoing warning Check string current values in the Sunny Central String Monitor If the string current values are correct Adjust parameter ErrLevGr in the Sunny Central String Monitor Controller If the string current values are incorrect Check the hardware of the Sunny Central String Monitor Use clamp meter to test the PV field panel 74 SSMUS TUSO945 11 Technical Description SMA Solar Technology AG Troubleshooting Display Meaning Corrective measures gt Warning 381 Communication with the Sunny Check under spot value lt Warning 381 Central String Monitor has SSMUWrnCode to establish which failed Sunny Central String Monitor is faulty see Section 11 3 1 Spot values Sunny Central String Monitor Controller page 64 gt Incoming warning lt Outgoing warning
60. to operate e Operate the Sunny Central String Monitor only if no damage is visibly evident e Visually check the Sunny Central String Monitor for damage on a regular basis e Ensure that all external safety features are freely accessible at all times and that they are regularly tested for correct functionality Technical Description SSMUS TUSO9451 1 13 Security SMA Solar Technology AG NOTICE Electrostatic discharges possible when components are touched Damage to components e Follow ESD protective provisions e Remove existing electrostatic charges by touching a grounded metal surface e g housing i Storage of the Documentation The documentation must be kept in the immediate vicinity of the Sunny Central String Monitor They must be available to operators and maintenance staff at all times SSMUS TUS09451 1 Technical Description SMA Solar Technology AG Unpacking 3 Unpacking 3 1 Unpacking and Inspection All SMA Sunny Central String Monitors are thoroughly checked before they are packaged and shipped Although they are shipped in sturdy packaging damage can still occur during shipping and delivery It is important to carefully inspect the shipping container and contents prior to installation If you detect any external damage after unpacking report the damage immediately to your SMA dealer and to the shipping company that delivered the unit If it becomes necessary to return the Sunny Cen
61. tral String Monitor USA use the original packing material If you need assistance with a damaged Sunny Central String Monitor contact your SMA dealer or SMA America Contact information for SMA America is provided in chapter 14 Contact page 80 3 2 Packing List 7 A f w c o nan OA a i 2000 i D E F Le F O Position Description A Sunny Central String Monitor US left version 24 and 32 right version 64 B Installation kit for pole mounting Installation kit for wall mounting D Installation Guide mounting and installation of the Sunny Central String Monitor Circuit Diagrams circuit diagrams of the Sunny Central String Monitor m 2x plug for communication cable F Termination resistor plug Technical Description SSMUS TUS09451 1 15 Unpacking SMA Solar Technology AG 3 3 Identifying the Sunny Central String Monitor The Sunny Central String Monitor can be identified with the type label see image on the right The type label is located on the inside of the Sunny Central String Monitor door Specified on the type plate SMA Solar Technology AG ma www SMA de Le Position Name Description Monitor type name with version code optional SUNNY CENTRAL String Monitor US A Model SSM US 20 107 B Fabrication Version P02 C Fabrication Date 09 2009 A Model The Sunny Central String
62. trs onssas uat a aea a Mead dub top d gah hand 65 Parameters for Sunny Central String Monitor Controller 66 Parameters for Sunny Central String Monitor 000 0 eee eee 69 Setting the PV Plant Monitoring System 0 70 Optional Settings for the PV plant Monitoring System 72 Setting the communication period of Sunny Central String Monitors 72 Setting the monitoring period of Sunny Central String Monitors 72 Allocation of PV strings to groups 6 2 uaiue erae 73 Troubleshooting i000 59 snd cre neces he eng ewe eed 74 Detection and Elimination of Faults 0 74 Detecting errors with the Sunny Central String Monitor Controller 74 Detecting errors with the Sunny Central String Monitor 75 Confirm Warning ss iesse picid 04 Vas ad sag ow aS 75 Technical Datd vsvas sess teeeacbaitertsastenseoss 76 Torques and Cable sizes isos satin nwa as wae nears 78 Negative Grounding 0 00 c cece eens 78 Positive Grounding 24 shin acti ie te ie NN ta ad aA he dn 78 CONTIG i eapin tea ead eS ews tee date ese ee Rs 80 Technical Description SSMUS TUSO9451 1 9 SSMUS TUSO945 11 SMA Solar Technology AG Technical Description SMA Solar Technology AG About this Manual 1 About this Manual The manual describes how to install and commission the Sunny Central String Monitor US For the purposes of this manual the Sunny Central String Monitor US
63. unny Central String Monitor can be mounted to a PV module rack Technical Description SSMUS TUSO94511 19 Mounting SMA Solar Technology AG 4 2 Mounting to a Pole 4 2 1 Mounting the Sunny Central String Monitor to a pole square The Sunny Central String Monitor can be mounted to a square or round pole An installation kit for pole mounting is included in the Sunny Central String Monitor accessories kit This section describes mounting to a square pole A Pole mount A B B Threaded bolt ps 5 SS C Nuts II OP D Washers C 6668 Dimensions of the square pole The Sunny Central String Monitor can be mounted on square poles with the following dimensions e minimum 3 94 in 100 mm e maximum 7 48 in 190 mm Two mounting rails are attached to the rear side of the Sunny Central String Monitor In the middle of the mounting rails there are 2 internal threads for attaching the pole mount 20 SSMUS TUSO945 11 Technical Description SMA Solar Technology AG Mounting 1 Securely screw the 4 threaded bolts into the internal threads of the mounting rail in a clockwise direction 2 Lift the Sunny Central String Monitor to the mounting position on the pole 3 Slide pole mounts at top and bottom with the closed side to the threaded bolts The required torque is 89 Ibn 4 Slide washers onto the threaded bolts 5 Screw the nuts onto the threaded b

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