American Power Conversion MX28B-400 User's Manual
Contents
1. Figure 4 1 2 MX28B BLOCK DIAGRAM MX28B 400 24V Product Manual 10 990 9218 MX28B 400 24V Product Manual 4 2 Power Output Capacity The power supplies a maximum of 400 amps or 300 amps with N 1 redundancy The housing for this configuration provides space for one rectifier shelf that can hold up to four rectifiers a control unit and one tier of up to 24 distribution circuit breakers 4 3 Rectifiers The rectifiers are APC DC Network Solutions Inc Model MRF28H27BV with specifications as follows e Input Voltage 176 264V ac 230V ac nominal 45 66 Hz e Input Current per Rectifier 13 9 Amps 230V ac e Apparent Power Factor 99 Typical 98 Minimum e Output Voltage 27 2 V de e Over voltage Protection Set at 31 5 V de e Output Current per Rectifier 100A Maximum Continuous e Power Output per Rectifier 2800W Continuous Vin gt 198V ac e Efficiency 89 Typical e Cooling Fan cooled front to rear airflow e Ambient Temperature 25 C to 65 C Operational 4 4 Control Unit The microprocessor based power system control unit is 1U high 1 75 and provides control and monitoring functions Features implemented are 32 character alphanumeric display LED alarm and status indicators Standard voltage and battery charging control Battery temperature compensation optional Monitoring of up to two shelves of four rectifiers each Individual alarm monitoring of 24 breakers Eight al2. APC WWW apc com DC POWER PLANT PRODUCT MANUAL MODEL MX28B 400 24VDC 400Amp APC DC Networks 11035 Switzer Avenue Dallas TX 75238 800 800 4APC Revision 1 April 2002 Part Number 990 9218 MX28B 400 24V Product Manual 11 990 9218 MX28B 400 24V Product Manual REVISION HISTORY 990 9218 iii MX28B 400 24V Product Manual iv 990 9218 MX28B 400 24V Product Manual TABLE OF CONTENTS 990 9218 V MX28B 400 24V Product Manual vi 990 9218 28 400 24V Product Manual 1 GENERAL INFORMATION 1 1 1 2 1 3 Introduction DC Power Plants from APC DC Network Solutions Inc have unique features that make them easy to install maintain and upgrade The rectifier units are modular and truly hot pluggable into the shelf assembly without any separate ac wiring All system settings are made from the system control unit that provides monitoring and control functions for each component of the system as well as alarm listings for system diagnosis and maintenance The APC DC Network Solutions Inc International network of sales and service offices and qualified representatives provides sales assistance for proposals purchases and after sales support APC DC Network Solutions Inc provides nationwide 24 hour 7 day service response by dialing 800 800 4APC This service will answer your call gather specific service information and have a qualified APC service representative contact
3. 990 9218 13 MX28B 400 24V Product Manual 14 990 9218 MX28B 400 24V Product Manual 5 INSTALLATION PROCEDURES 5 1 Preparation 5 1 1 Recommended Tools e Standard selection of insulated hand tools e Proper tools for crimping the selected cable lugs 5 1 2 Recommended Test Equipment e Digital Multimeter 5 1 3 Equipment Inspection Remove equipment from packing material and inspect for shipping damage to verify the safety and operational suitability for the installation site Refer to Section 1 3 5 1 4 Safety Precautions eee WARNING CAUTION eek Handling or touching the controller boards located inside this unit without being electro statically discharged grounded to the frame may cause extensive damage to the electronics Before touching or handling the controller boards it is recommended that an ESD wrist strap be utilized eee WARNING Seek Hazardous energy levels are present on bare conductors in the 48V dc distribution connection area of the plant Accidental shorting of distribution conductors can cause arcing and high currents that can cause serious burns or other physical harm It is recommended that Any jewelry rings or watches be removed while working on this equipment Handles of all wrenches screwdrivers cutters and pliers be insulated Shafts of screwdrivers be wrapped in electrical tape or otherwise insulated 5 1 5 Room Locations NOTE The APC DC Network So
4. Max Rech m 100 A Method m 000000 Disc Thr m 10 A Batt Disc Alm m Minor 990 9218 MX28B 400 24V Product Manual Table 6 4 1 Parameter Locations Descriptions and Default Values PARAMETER High Voltage Alarm 1 BATT SET ALM Low Voltage Alarm 1 BATT SET ALM High Temperature Alarm 1 BATT SET ALM Low Temperature Alarm 1 BATT SET ALM RECTIFIER SETUP Fail Safe Voltage 1 MODULES RECT PARAM Communications Timeout 1 MODULES RECT PARAM Rectifier Information Rectifier Description MODULES RECT INFO Rectifier Current MODULES RECT INFO Current Limit Alarm MODULES RECT INFO Standby Alarm MODULES RECT INFO Fan Fail Alarm MODULES RECT INFO Rectifier Fault Alarm RFA MODULES RECT INFO Rectifier Alarms Current Limit Alarm 1 MODULES RECT SET ALM Standby Alarm 1 MODULES RECT SET ALM Fan Fail Alarm 1 MODULES RECT SET ALM 990 9218 DESCRIPTION An alarm that is generated if the magnitude of the battery voltage rises above the high voltage threshold An alarm that is generated if the magnitude of the battery voltage drops below the low voltage threshold An alarm that is generated if the battery temperature exceeds the high temperature threshold An alarm that is generated if the battery temperature drops below the low temperature threshold Rectifier default output voltage if communication with the control u
5. SYSTEM IN RLY RLY MAP OUTPUT RELAY SETUP Output Relay 1 Alias 1 SYSTEM OUT RLY ALIAS Output Relay 6 Alias 1 SYSTEM OUT RLY ALIAS Output Relay Minor Alias 1 SYSTEM OUT RLY ALIAS Output Relay Major Alias 1 SYSTEM OUT RLY ALIAS Output Relay 1 Delay 1 SYSTEM OUT RLY RLY MAP Output Relay 6 Delay 1 SYSTEM OUT RLY RLY MAP 990 9218 An alternate name alias can be assigned to the relay if desired An alternate name alias can be assigned to the relay if desired An alarm activated in response to an external contact closure or opening at the Input Relay 1 connection An alarm activated in response to an external contact closure or opening at the Input Relay 4 connection An alternate name alias can be assigned to the relay if desired An alternate name alias can be assigned to the relay if desired An alternate name alias can be assigned to the relay if desired An alternate name alias can be assigned to the relay if desired Delay between sensing of the alarm condition and activation of the alarm relay An alarm condition must exist for longer than the delay to be activated Delay between sensing of the alarm condition and activation of the alarm relay An alarm condition must exist for longer than the delay to be activated In Rly 1 Input Relay 1 In Rly 4 Input Relay 4 In Rly 1 Alm m Ignore In Rly 4 Alm m Ignore Out Rly 1 Dly mt 0 sec Out Rly 6 Dly
6. interface card provides fuseholders for eight fuses labeled F1 through F8 which can be used for small 24V dc loads The maximum fuse size that should be used is 10A 5 7 3 Load Connections 5 7 3 1 Circuit Breakers Connections for 24V dc loads require standard two hole lugs for 10 screws on 5 8 centers and are located directly above the corresponding circuit breaker The load returns connect to the return bus located just above and rearward of the breaker connection points as seen in Figure The return bus provides 24 sets of threaded 10 32 holes on 5 8 centers and four sets of threaded 14 20 holes on 34 centers for connection of two hole lugs on load return wires 5 7 3 2 GMT Fuses Connections to the GMT fuses are made at terminal block connectors labeled F1 through F8 that are located on the interface card mounted in the top left side of the unit Each connector has two positions labeled V V for connection of the dc load and load return wires 990 9218 21 MX28B 400 24V Product Manual 5 8 5 9 Battery Temperature Probe Installation The optional temperature probe is used to monitor the battery string temperature To get the most representative temperature measurement the probe should be placed in contact with a battery cell that is centrally located The probe should be placed directly in contact with the cell not the frame surrounding the cell Generally the cell cov
7. m 0 sec 33 MX28B 400 24V Product Manual Table 6 4 1 Parameter Locations Descriptions and Default Values PARAMETER DESCRIPTION DISPLAY SCREENS DEFAULT SETTINGS ES EME Output Relay 1 1 Output Relay 1 alarm can be mapped to activate other Out Rly 1 Alm m SYSTEM OUT RLY RLY MAP output relays Ignore activates no additional relays Ignore Output Relay 6 1 Output Relay 6 alarm can be mapped to activate other Out Rly 6 Alm m SYSTEM OUT RLY RLY MAP output relays Ignore activates no additional relays Ignore LVD SETUP LVDI Trip 1 LVD trip disconnect threshold voltage MODULES LVD PARAM LVDI Restore 1 LVD restore reconnect threshold voltage MODULES LVD PARAM LVD1 Option 1 Set to Enable if the unit has an LVD Option m MODULES LVD SET ALM Enable LVD2 Trip 1 LVD trip disconnect threshold voltage MODULES LVD PARAM LVD2 Restore 1 LVD restore reconnect threshold voltage MODULES LVD PARAM LVD2 Option 1 Set to Enable if the unit has an LVD Option m MODULES LVD SET ALM Enable LVD Alarm LVDI Alarm 1 Sets the priority or mapping of an LVD Alarm LVD1 Open Alm m MODULES LVD SET ALM Minor LVD2 Alarm 1 Sets the priority or mapping of an LVD Alarm LVD2 Open Alm m MODULES LVD SET ALM 1 Minor 34 990 9218 MX28B 400 24V Product Manual Figure 6 4 1 Control Unit Menu Structure MX28B STATU
8. provided in p 72 FUSE RATING PART NUMBER 1 4 A FFA 0030 1 2 A FFA 0031 3 4 A FFA 0032 1A FFA 0033 14 FFA 0039 12 A FFA 0035 3A FFA 0036 SA FFA 0037 10A FFA 0038 Table 5 7 2 GMT Fuses 5 7 2 Installation of Circuit Breakers and Fuses 5 7 2 1 Plug in Circuit Breakers 1 Remove the circuit breaker cover panel and the plastic cover s from the desired location s 2 Install the circuit breaker s by snapping the top terminal onto the upper bus bar and rotating the unit down until the second terminal snaps onto the breaker termination post as shown in The breaker alarm terminals are designed to make contact with the alarm terminal board as the breaker is snapped into place NOTE Circuit breaker alarm contacts close when the circuit breaker is tripped but not when it is turned OFF CAUTION 3 Reattach the circuit breaker cover panel 20 990 9218 MX28B 400 24V Product Manual ALARM TERMINATION BOARD BREAKER TERMINATION POST Figure 5 7 1 Installation of Circuit Breakers 5 7 2 2 GMT Fuses Fuseholders that accommodate GMT fuses are located on the interface card mounted in the top left side of the unit These fuseholders are only connected to 24V dc if the system has been purchased with the GMT fuse option This option supplies 24V dc to the fuseholders through a 50 A circuit breaker located in circuit breaker Position 1 The
9. you as quickly as possible refer to section on customer service and support Precautions It is extremely important to read understand and strictly follow the instructions in sections on installation and setup Also please note the special SAFETY PRECAUTIONS outlined in Section before beginning actual installation of the power system If any precautions are not clearly understood or local conditions are not covered contact the nearest APC DC Network Solutions Inc Representative or APC DC Network Solutions Inc at 800 800 4APC for clarification Also refer to all applicable federal state and local regulations and industry guidelines for correct installation of this power system Inspection upon Receipt of Goods 1 3 1 General APC DC Network Solutions Inc has taken precautions in packing the power equipment for shipment to ensure its safe arrival however the entire shipment including any boxes or crates should be inspected upon receipt for evidence of damage that may have occurred during transit 1 3 2 Visible External Damage It is the responsibility of the person receiving the shipment to inventory and inspect all materials against the bill of lading or waybill provided IMMEDIATELY upon taking delivery while the carrier representative is STILL ON SITE Please be sure that all items are accounted for including the correct number of pallets and the quantity of accessory and or component boxes Also note any visible extern
10. 0 24V Product Manual ALARM TERMINAL OUTPUT DESIGNATION USER ALARM NOTES NO NC C RELAY 1 1 1 1 2 NO2 NC2 C2 RELAY 3 NO3 NC3 C3 RELAY 4 NO4 NC4 C4 J2 RELAY 5 NOS5 NC5 C5 RELAY 6 NO6 NC6 C6 MINOR NO7 NC7 C7 MAJOR NO8 NC8 C8 Table 5 6 3 Alarm Output Connections 5 7 Connecting The Loads 5 7 1 DC Circuit Breakers and Fuses Both plug in circuit breakers and GMT fuses can be installed in the MX28B power plant for dc distribution circuit protection Available plug in circuit breakers are shown in Table 5 7 1 Plug in circuit breakers rated at 60A or more require two mounting positions and require a breaker adapter kit which is included see kit selection information below the table The breaker adapter kit includes all necessary mounting hardware BREAKER PART NUMBER BREAKER PART NUMBER RATING RATING 1A FFA 0014 40 A FFA 0020 3A FFA 0015 50A FFA 0025 5A FFA 0016 60 A FFA 0021 X 10A FFA 0017 TOA FFA 0022 X 15A FFA 0028 80A FFA 0023 X 20A FFA 0018 100A FFA 0024 X 30A FFA 0019 adapter has 10 studs on 5 8 centers for two hole cable lug 2 adapter has 10 studs on 34 centers for two hole cable lug 3 adapter has 44 studs 1 centers for two hole cable lug Table 5 7 1 Plug in Circuit Breakers 990 9218 19 MX28B 400 24V Product Manual A list of GMT type fuses available from APC DC Network Solutions Inc is
11. 9218 DESCRIPTION The control unit temperature is below the low temperature threshold The rectifier configuration differs from its stored configuration Rectifier Fail 1 of N alarm one rectifier has at least one alarm condition Rectifier Fail 2 of N alarm two or more rectifiers have at least one alarm condition each This alarm indicates there is a hardware failure in the system voltage monitoring function This alarm indicates there is a hardware failure in the battery current monitoring function This alarm indicates there is a hardware failure in the battery temperature monitoring function This alarm indicates there is a hardware failure in the system temperature monitoring function This alarm indicates there is a conflict between the commanded and sensed positions of the LVD Display of up to 16 active alarms a typical alarm screen is shown Display of up to 16 active alarms a typical alarm screen is shown Setting this parameter to Enable will cause the current rectifier configuration to be stored the display toggles back to Disable after entry Setting Lamp Test to ON will turn on the MAJOR MINOR NORMAL MAJ and MIN LEDs on the control unit front panel This parameter must be set to Enable to permit the eight output relays to be manually tested otherwise the state of the relays will be per system conditions Setting this parameter to ON e
12. MIN LED on the control unit front panel Setting this parameter to ON de energizes the Major Relay and turns on the MAJ LED on the control unit front panel Float voltage at 25 C battery temperature Maximum battery recharge current the system limits the charging current to this programmable value Activate 000001 or de activate 000000 battery temperature compensation Temperature compensation between low knee and high knee in mV cell C Compensation equals zero at 25 C The temperature compensation high knee is the point above which there is no additional battery voltage compensation for further increases in temperature The temperature compensation low knee is the point below which there is no additional battery voltage compensation for further decreases in temperature An alarm is generated if the battery discharge current exceeds this value An alarm is generated if the magnitude of the battery voltage rises above this value An alarm is generated if the magnitude of the battery voltage drops below this value An alarm is generated if the battery temperature exceeds this value An alarm is generated if the battery temperature drops below this value An alarm that is generated if the battery discharge current exceeds the programmed battery discharge threshold DISPLAY SCREENS DEFAULT SETTINGS Test Relay 6 m OFF Test Min Rly mt OFF Test Maj Rly mt OFF Batt Float 27 00 V
13. NECTED TO THE MASTER STATION GROUND THE LEFT END OF THE RETURN BUS PROVIDES A PAIR OF THREADED 3 8 16 HOLES ON 1 INCH CENTERS FOR CONNECTION OF A TWO HOLE LUGGED CABLE TO THE MASTER STATION GROUND DETAILS FOR THIS CONNECTION SHOULD BE PROVIDED IN THE SITE ELECTRICAL GROUNDING PLAN 5 5 Rectifier Installation The APC DC Network Solutions Inc Model MRF28H27BV rectifiers are shipped in separate containers Follow the procedure below to install a rectifier 1 Remove the rectifier from its shipping container 2 Remove the rectifier retaining screw from the shelf position where the rectifier is to be installed 3 Slide the rectifier into the shelf between the guides until it is fully seated 4 Fasten the rectifier in place with the rectifier retaining screw Since all adjustments are made from the system control unit no rectifier adjustments are necessary 990 9218 17 MX28B 400 24V Product Manual 5 6 Alarm Connections The alarm connections for all rectifiers breakers and fuses are factory pre wired The MX28B dc power plant however permits the user to program the system alarms in various ways 5 6 1 External Alarm Inputs Four external alarm inputs with assignable priority levels are available These alarm inputs respond to external dry contact closures between normally open NO and common C or contact openings between normally closed NC and C see Table 5 6 1 External Alarm Source Connect To Input non alarm s
14. Network Solutions Inc 1 3 4 Return of Damaged Goods Should equipment be damaged and require return to APC DC Network Solutions Inc for repair the APC DC Network Solutions Inc service representative will provide instructions along with a valid returned material authorization RMA number to facilitate return of the damaged goods to the APC DC Network Solutions Inc repair center It is important that the steps outlined in Section 1 3 2 and Section 1 3 3 above are followed carefully Your APC DC Network Solutions Inc representative will assist you if required in obtaining proper disposition of an initial delivery return issue however a valid RMA number must be obtained before returning any equipment to APC DC Network Solutions Inc 2 990 9218 MX28B 400 24V Product Manual 2 CUSTOMER SERVICE AND SUPPORT APC DC Network Solutions Inc manufactures a line of power plants and provides customers with complete product and systems support and service APC DC Network Solutions Inc has an international network of factory trained service technicians The service organization is on call 24 hours a day 365 days a year If there is a problem with the power system contact APC at 800 800 4A PC Units returned for repair can be turned around within 24 to 48 hours of receipt at the factory location Shipment should be sent pre paid The unit will be returned pre paid provided it was received that way An RMA must be obtained for all equipm
15. Rect Rect PARAM Rect Rect INFO Rect Rect Rect Rect Rect Rect CIRBKR SET ALM Cir Cir Cir Cir Cir Cir ALIAS Cir Cir Cir Cir Cir Cir 990 9218 ay ay ay Rly Rly OUR 00 l0H CL Alm Stdby Alm FF Alm RFA Alm Fail Safe Fail Comm Desc Curr CL Stdby FF RFA ce che db db Gk Bkr 1 Alm Bkr 2 Alm Bkr 3 Alm e e e Bkr 70 Alm Bkr 71 Alm Bkr 72 Alm Bkr 1 Bkr 2 Bkr 3 e e e Bkr 70 Bkr 71 Bkr 72 37 MX28B 400 24V Product Manual Figure 6 4 1 Control Unit Menu Structure FUSE SET ALM FUSE FUSE FUSE FUSE ALIAS FUSE FUSE e e e FUSE FUSE LVD SET ALM LVD1 LVD1 LVD2 LVD2 PARAM LVD1 LVD1 LVD2 LVD2 BATT SET ALM Batt Dis Batt Dis Batt HV Batt HV Batt LV Batt LV Batt HT Batt HT Batt LT Batt LT PARAM 1 Alm 2 Alm 15 Alm 16 Alm 15 16 Option Open Alm Option Open Alm Trip Reset Trip Reset c Thr c Alm Thr Alm Thr Alm Thr Alm Thr Alm Batt Batt 38 Float Max Rech 990 9218 MX28B 400 24V Product Manual Figure 6 4 1 Control Unit Menu Structure COMP Comp Method Comp TC Comp HKnee Comp LKnee PIN PIN OEM OEM R Offset OEM R Gain OEM S Offset OEM S Gain 990 9218 39 MX28B 400 24V Product Manual 40 990 9218
16. S CIRBKR ALIAS Circuit Breaker Alarms Breaker 1 Tripped 1 MODULES CIRBKR SET ALM Breaker 24 Tripped 1 MODULES CIRBKR SET ALM GMT 1 Alias 1 MODULES GMT ALIAS GMT 8 Alias 1 MODULES GMT ALIAS DESCRIPTION DISPLAY SCREENS DEFAULT SETTINGS Rect RFA Alm m n of N This alarm indicates that a rectifier output has failed An alternate name alias that can be assigned to a circuit breaker if desired Cir Bkr 1 24V An alternate name alias that can be assigned to a circuit breaker if desired Cir Bkr 72 24V An alarm that indicates Circuit Breaker 1 is tripped Cir Bkr 1 Alm m Major An alarm that indicates Circuit Breaker 24 is tripped Cir Bkr 24 Almm Major An alternate name alias that can be assigned to a GMT Fuse 1 if desired An alternate name alias that can be assigned to a GMT Fuse 8 if desired FUSE 16 24V GMT 1 Blown Secure carr Do ad GMT 8 Blown 1 MODULES GMT SET ALM 32 An alarm that indicates GMT Fuse 1 is blown FUSE 1 Alm E An alarm that indicates GMT Fuse 8 is blown FUSE 16 Alm Major mt 990 9218 MX28B 400 24V Product Manual Table 6 4 1 Parameter Locations Descriptions and Default Values PARAMETER DESCRIPTION DISPLAY SCREENS DEFAULT SETTINGS Input Relay 1 Alias Input Relay 4 Alias 1 SYSTEM IN RLY ALIAS Input Relay Alarms Input Relay 1 1 SYSTEM IN RLY RLY MAP Input Relay 4 1
17. S Sys Voltage Sys Current Sys Temp Batt Current Batt Temp ALARMS Alarm Item Alarm Item Alarm Item Alarm Item Alarm Item Alarm Item Alarm Item Alarm Item Alarm Item Alarm Item Alarm Item Alarm Item Alarm Item Alarm Item Alarm Item Alarm Item SYSTEM SET ALM Sys HV Thr Sys HV Alm Sys LV Thr Sys LV Alm Rect Cfg Alm Rect lofN Alm Rect 20fN Alm Sys HT Thr Sys HT Alm Sys LT Thr Sys LT Alm Hw Sys V Alm Hw Batt C Alm Hw Batt T Alm Hw Sys T Alm Hw LVD1 Alm Hw LVD2 Alm SETUP PIN 1 PIN 2 Address 1 0QG IH BWNHO 990 9218 Addr Addr Mode Fahr Cntr MX28B 400 24V Product Manual ess 2 ess 3 1 enheit 1 Rev FW Version Display Type Figure 6 4 1 Control Unit Menu Structure DATE Date Time OUT RLY RLY MAP Out Rly 1 Alm Out Rly 2 Alm Out Rly 3 Alm Out Rly 4 Alm Out Rly 5 Alm Out Rly 6 Alm Out Rly 1 Dly Out Rly 2 Dly Out Rly 3 Dly Out Rly 4 Dly Out Rly 5 Dly Out Rly 6 Dly ALIAS Out Rly 1 Out Rly 2 Out Rly 3 Out Rly 4 Out Rly 5 Out Rly 6 Relay Minor Relay Major IN RLY RLY MAP In Rly 1 Alm In Rly 2 Alm In Rly 3 Alm In Rly 4 Alm ALIAS In Rly 1 In Rly 2 In Rly 3 In Rly 4 DIAG Store Cfg Lamp Test Test Relay En 990 9218 MX28B 400 24V Product Manual Figure 6 4 1 Control Unit Menu Structure Test Relay Test Relay Test Relay Test Rel Test Rel Test Rel Test Min Test Maj MODULES RECT SET ALM Rect Rect
18. SETUP Password PIN that permits security Level 1 parameter changes limited access Password PIN that permits security Level 2 parameter changes unlimited access OEM R Offset 2 OEM OEM Gain 2 OEM OEM S Offset 2 OEM OEM S Gain 2 OEM Site Address Identification Address 1 1 SYSTEM SETUP Address 2 1 SYSTEM SETUP Address 3 1 SYSTEM SETUP Voltage offset adjustment for factory calibration of voltage readings settings Voltage gain adjustment for factory calibration of voltage readings settings Current offset adjustment for factory calibration of battery current readings settings Current gain adjustment for factory calibration of battery current readings settings Power plant address or identification first line Power plant address or identification second line Power plant address or identification third line OEM Offset m 0 000 V OEM R Gain mt 1 000 V OEM S Offset m 0 0A OEM S Gain mt 1 000 A Address 1 APC DCNS Address 2 m 11035 Switzer Av Address Dallas Model Type 2 SYSTEM SETUP Temperature Scale 1 SYSTEM SETUP Control Unit Revision SYSTEM SETUP Firmware Version SYSTEM SETUP 990 9218 Model type number for the MX28B dc power plant NOTE Changing the model number causes the system to reinitialize Enables selection of Fahrenheit or Celsius temperature scale Fahrenheit OFF displa
19. al damage that may have occurred during transit 990 9218 1 MX28B 400 24V Product Manual If damage has occurred or the quantity of items is not correct then 1 Make a descriptive notation on the delivery receipt before signing 2 File a damage or shortage report with the carrier that delivered the shipment 1 3 3 Concealed Damage It is the customer s responsibility to unpack the power system and equipment received from APC DC Network Solutions Inc and check for concealed damage Within 15 days of receipt check the materials received against the detailed packing list to verify that the quantity and condition are complete and satisfactory Again note any damage to the internal packing material and or material shortages If damage or shortage is noted then 1 Request an inspection by the carrier 2 File a concealed damage claim and or 3 File a material shortage claim with your APC DC Network Solutions Inc representative DELAY IN NOTIFYING THE CARRIER MAY RESULT IN LOSS OF RIGHT TO REIMBURSEMENT FOR DAMAGES OR LOSS If you are unsure about the appearance of a part while conducting the materials inventory and inspection refer to the manual or contact the Customer Service Department of APC DC Network Solutions Inc Should you have any questions concerning potential damages or should you experience a lack of cooperation from your carrier please contact your APC DC Network Solutions Inc representative or call APC DC
20. andard 10 32 two hole lugs on 5 8 inch centers are located directly above the corresponding breaker The load returns connect to the return bus which accommodates 24 two hole 10 32 lugs on 5 8 inch centers and four two hole 14 20 lugs on 4 inch centers The return bus also provides a pair of threaded 3 8 16 holes on 1 inch centers for connection of a cable to the master station ground Figure 4 7 1 shows the power plant s dc distribution section with the front cover removed Eight GMT fused outputs are also available as an option This option uses one of the 24 available circuit breaker positions 990 9218 MX28B 400 24V Product Manual Figure 4 7 1 DC Distribution Front Cover Removed 4 8 Mounting Both front mounting on standard 2 inch rails and optional wall mounting are available 4 9 Environmental e Ambient Temperature 40 C to 65 C operating 40 C to 85 C storage e Humidity 0 to 85 RH non condensing operating 0 to 95 RH non condensing storage e Altitude Up to 3000m operating Up to 10 000m storage 4 10 Mechanical e Dimensions 15 75 high x 23 wide x 17 5 deep 400 amp unit e Weight Housing 85 lbs 400A Rectifier 11 Ibs e Color Dawn Gray fronts 4 11 Compliance UL 1950 e Bellcore GR 63 CORE Sections 4 1 3 Altitude 4 2 Shelf Level Fire Resistance 4 3 Use of Fire Resistant Materials 4 5 Airborne Contaminants 4 6 Acoustic Noise e FCC Part 15 Class A Pending
21. arm annunciation relays Major Minor and six user defined with form C contact outputs Four external alarm inputs either N O or N C contacts Control of either a battery or a load LVD 4 5 AC Input Power Each rectifier requires 208 220 240V ac single phase 50 60 Hz supplied through an external 20 amp two pole breaker A rear located enclosure with two holes for customer supplied one inch conduit entry provides a terminal strip s for ac input power connection and a separate Earth Ground bar for connection of the safety ground wire s 990 9218 11 MX28B 400 24V Product Manual 4 6 Battery connections Top entry battery connections are made at the top rear of the unit see Figure 4 6 1 The voltage and return buses each provide two sets of threaded 3 8 16 holes on one inch centers for connecting two hole battery cable lugs A battery disconnect breaker is required external to this equipment The power plant can monitor auxiliary contacts from this breaker Battery temperature compensation is available APC s standard temperature monitor sensor and cable is used to implement this optional function Figure 4 6 1 Battery Cable Connection Locations 4 7 DC Distribution 12 A standard 24 position plug in circuit breaker tier provides power distribution The breaker tier is connected at its center to the dc distribution bus and each side has an ampacity of 300A Connections for 27V dc loads requiring st
22. ase distribution panel the circuit breaker positions should be selected such that the load is balanced as much as possible 16 990 9218 MX28B 400 24V Product Manual 5 3 Battery Connections 5 3 1 Battery Disconnect An external circuit breaker not supplied is required in the negative line located at the battery end to protect the cables from the battery to the MX28B dc power plant The power plant can monitor auxiliary contacts from this breaker 5 3 2 Cable Sizing Considerations The battery cable s should be sized sufficiently large to limit the voltage drop from the MX28B dc power plant to the battery during charging per system design requirements The cable s must also carry the full load current during battery operation If assistance is required to determine the necessary cables for the application contact your sales representative or APC DC Network Solutions Inc 5 3 3 Connecting the Cables The battery cable connections are located at the top rear of the unit as shown in Figure 4 6 1 The battery positive 24V bus and battery negative Return bus buses each provide two sets of threaded 3 8 16 holes on one inch centers for connecting two hole battery cable lugs Connect the battery cables as applicable using 3 8 16 bolts not provided and tighten them with a torque wrench to 200 in Ibs CAUTION ek 5 4 DC SYSTEM GROUNDING THE NEGATIVE BATTERY CONNECTION RETURN BUS FOR THE POWER PLANT MUST BE CON
23. ase price of the product that gave rise to the claim The above warranty is in lieu of all other remedies including actions for contract or negligence All other warranties expressed or implied including but not limited to the implied warranties of merchantability and fitness for a particular purpose are hereby excluded 6 990 9218 MX28B 400 24V Product Manual 4 PRODUCT OVERVIEW AND TECHNICAL DESCRIPTION 4 1 Description The APC DC Network Solutions Inc Model MX28B is a modular stand alone 24V dc power plant It is configurable in such a manner that it will support most typical applications within the current range of 400 amps without special application engineering or assistance Distribution is included for up to 24 plug in circuit breakers These circuit breakers can be to 100 amps with 60 100 amp breakers requiring two positions and a circuit breaker adapter kit An optional low voltage disconnect LVD can be provided on either the battery or the load side A 400 amp MX28B is shown in Figure 4 1 1 A block diagram is shown in Figure 4 1 2 Figure 4 1 1 24V dc 400 Amp MX28B 990 9218 7 MX28B 400 24V Product Manual 8 990 9218 990 9218 00000000 MX28B 400 24V Product Manual A
24. ated at 990 9218 25 MX28B 400 24V Product Manual 6 3 6 4 26 SYSTEM IN RLY ALIAS For information on wiring connections to these inputs refer to Section 5 6 1 Alarm Output Relays There are eight alarm output relays designated Relay 1 through Relay 6 Minor and Major respectively Various system parameters may be programmed to activate any of these alarm relays when set thresholds are exceeded or specific conditions occur The first six relays can also be assigned a priority and routed or mapped to other output alarm relays Available assignments are Ignore Major Minor and Relay 1 e e e Relay 6 Screens for making these assignments are located at SYSTEM OUT RLY RLY MAP This feature makes it possible for a single alarm condition to activate multiple alarm output relays including the Minor or Major alarm relay A user defined name or alias may also be assigned to each of the eight output relay alarms Screens for making these assignments are located at SYSTEM OUT RLY ALIAS For information on making wiring connections to the alarm output relays refer to Section Parameter Locations Descriptions and Default Values The location description and factory programmed default value for each of the MX28B system parameters is found in Table 6 4 1 The table also shows all of the status and information screens with typical displays The location of a parameter screen is shown in brack
25. ent returned to APC DC Network Solutions Inc It is important that correct procedures be followed in filing an RMA including providing an accurate written description of the problem An accurate written problem description will help ensure that the unit will be properly repaired If a unit is returned and a No Fault Found results APC DC Network Solutions Inc reserves the right to bill the customer for labor and assess a service charge to cover extra costs incurred 990 9218 3 MX28B 400 24V Product Manual 4 990 9218 MX28B 400 24V Product Manual 3 WARRANTY PROVISIONS 3 1 General Provisions APC DC Network Solutions Inc warrants the power equipment and components it manufactures or sells against defective materials and workmanship for a period of TWO 2 YEARS from the date of shipment 3 1 1 Warranty Returns Tf initial physical inspection results in identification of a material or workmanship flaw s that could impair product performance as defined by APC s electrical and physical specification in effect at the time of shipment and if this flaw s is not due to transportation damage or installation abuse contact APC DC Network Solutions Inc or call the 24 hour emergency number 800 800 4APC to request assistance You will be provided either a an RMA number with instructions for return of the equipment or component s to the APC DC Network Solutions Inc factory service center FOB destination freight pre paid for e
26. er can be used be careful not to allow the probe body to touch the terminals 1 Plug the connector end of the temperature probe into J5 the control unit backplane card 2 Route the cable as required to position the probe on the selected battery cell 3 Remove the adhesive protection strip from the probe body and press the adhesive side of the probe on the battery cell cover Power Up and Checkout Before initiating power up and checkout ensure that the following conditions exist 1 Make sure that the external circuit breaker protecting the cables from the battery to the power plant is turned OFF the battery cables should be connected to the power plant but the battery should not be connected 2 Make sure that all load circuit breakers are turned OFF including the one feeding the GMT fuses if the unit has the GMT fuse option 3 Verify that all rectifiers have been installed 5 9 1 Apply AC Power Turn on the circuit breakers that supply ac power to the rectifiers in the MX28B dc power plant The main screen should appear on the control unit display see Figure 5 9 1 The display on the control unit is a 2 lines by 16 characters display The cursor cycles below the characters of the active selection on the display Information shown in the second line of Figure 5 9 1 that extends beyond 16 characters to the right of the S in ALARMS can viewed on the control unit display by using the scrolling controls refer to Sectio
27. ets for example SYSTEM IN RLY RLY MAP To find the parameters that can be accessed in this category starting from the main menu screen do the following 1 Use the right or left arrow keys to position the cycling cursor below SYSTEM 2 Press the down arrow key once 3 Use the right arrow key to position the cycling cursor below IN RLY 4 Press the down arrow key once the cursor will be cycling below RLY MAP 5 Press the down arrow key repeatedly if necessary until the desired parameter screen is displayed there are eight parameter screens in this category 6 After making any desired changes refer to Section 6 1 for the procedure to return to the main menu press the up arrow key repeatedly If a parameter requires a level 1 or level 2 security access to permit changes to it the security level will be found in braces i e 2 in the PARAMETER column 6 4 1 The complete menu structure shown in the order in which it is accessed from the control unit display is presented in outline form in Figure 6 4 1 Each indentation to the right represents a menu level below the indicated title 990 9218 MX28B 400 24V Product Manual Table 6 4 1 Parameter Locations Descriptions and Default Values PARAMETER DESCRIPTION DISPLAY SCREENS DEFAULT SETTINGS PIN Entry PIN Screen for entry of the active password PIN Level 1 PIN Sak UU REL S Level 2 Password 2 SYSTEM
28. gher than the one presently set is required to modify the parameter s is displayed instead of m Status alarms and information screens have in the upper right corner of the display or in the case of rectifier information screens and can not be modified When ac power is initially applied there is a 60 second period during which no alarms are reported Pressing the M key on the front panel will change the m to M indicating that the parameter can now be changed using the arrow keys Some parameters can be changed to other predefined selections by pressing the up or down arrow keys to display an alternative selection These parameters can be recognized after the M key is pressed by the cursor cycling beneath the characters of the selection For other parameters such as text and most numeric values after the key is pressed the cursor will be displayed under an individual character The right or left arrow key is used to position the cursor below the character to be changed and the up or down arrow key is used to spin the digit or letter to the desired value When the desired changes have been made to an individual parameter screen the M key is pressed again the M changes back to m and the new entry is stored in memory If the user plans to make any changes to system parameters the first item that should be verified or entered is the appropriate password for the security level requ
29. ifier information displays to verify that all rectifiers installed can be viewed on the control unit display and that no rectifier alarms are active Section 6 provides location information for these parameters and how to make changes if required 5 9 3 Full System Power Up To complete a full system power up perform the following steps 1 2 3 4 990 9218 Turn OFF all the circuit breakers that supply ac power to the rectifiers in the MX28B dc power plant Turn on the external circuit breaker from the battery to the power plant Turn on all the circuit breakers that supply ac power to the rectifiers in the MX28B dc power plant Load circuit breakers may now be turned on as required 23 MX28B 400 24V Product Manual 24 990 9218 MX28B 400 24V Product Manual 6 SETUP ADJUSTMENTS AND OPERATION 6 1 6 2 User Interface The MX28B control unit provides a user interface designed with a hierarchical menu that can be viewed on the 32 character display by navigating with the left right up and down arrow keys located on the front panel The selected item on the display 15 identified by the cursor cycling beneath its characters The M modify key and the arrow keys are used to set parameters and text to customize the system operation for a specific application Items that can be modified have m in the upper right corner of the display If a security level hi
30. ired for the parameters to be modified Security level 2 enables modification of all variable system parameters level 1 permits modification of some parameters no security is required for viewing status items The security level password is entered through the PIN screen If no front panel keys are pressed for 60 minutes the active password reverts to 0000 and begins to move about the display Pressing any key returns the display to normal the password must be re entered if system parameters require changes Eleven LEDs are provided on the front panel of the control unit to indicate system status Three LEDs grouped together vertically provide overall system status they are MAJOR MINOR and NORMAL indicating the presence of a major alarm a minor alarm or normal operation The other eight LEDs correspond to the active state of each of the alarm output relays and are labeled ALM1 e e e ALM6 MIN and MAJ External Alarm Inputs The four external alarm inputs also referred to as Input Relay Alarms can be assigned a priority and routed or mapped to alarm output relays Available assignments are Ignore Major Minor and Relay 1 e e Relay 6 Screens for making the assignments are located at SSYSTEM IN RLY RLY MAP A user defined name or alias may also be assigned to each of these input alarms Screens for making these assignments are loc
31. lutions Inc Model MX28B dc power plant is to be installed in a room vault or similar enclosure that is accessible only to qualified persons in accordance with the NEC or the authority having jurisdiction 990 9218 15 MX28B 400 24V Product Manual Prior to installation drawings floor loading requirements external alarm points ac service entrance and grounding schemes should all be checked and confirmed If batteries are to be mounted in a room separate from the power plant careful attention should be paid to battery cable voltage drop effects Environmental operating temperatures and ventilation cooling considerations should also be noted not just for the power system but for all other equipment that may reside in the power room area 5 1 6 Mounting Both front mounting on standard 23 inch rails and optional wall mounting are available 5 1 7 Ventilation The rectifiers have fans that provide front to rear airflow for internal cooling The MX28B housing should mounted such that there is free airflow to the front top and bottom of the unit Refer to Section 4 9 for environmental characteristics 5 2 AC Service and Ground Connections WARNING oh ok ok Ensure that all of the dc and external ac circuit breakers are in the OFF position prior to connecting service to the power plant Confirm that all voltages have been removed including any battery sources before proceeding The MX28B dc power plant requires the suppl
32. n 6 for operation of the control unit NOTE When ac power is initially applied there is a 60 second period during which no alarms are reported MX28B at STATUS ALARMS SYSTEM MODULES BATT PIN OEM Figure 5 9 1 5 9 2 System Parameters Verification Adjustment 22 The MX28B system control unit is delivered with pre programmed parameter default settings A complete listing and description of all system configuration parameters as well as displayable system status and information is provided in Section Section e to gain an understanding of and how to use the operational features provided by the MX28B dc power plant Asa minimum the following parameters should be verified and adjusted if required before connecting batteries or loads to the power plant 990 9218 MX28B 400 24V Product Manual 1 2 3 4 5 Battery Float Voltage default 27 00V dc Check the manufacturer s recommendation for the batteries being used in the system Battery Maximum Recharge Rate default 100A Bellcore specifications recommend a maximum charging rate of capacity in Ampere hours divided by 20 hours check the manufacturer recommendation System Voltage measurement 27 00V dc This is a measurement by the system of the dc output bus voltage LVD Option default Enable If the MX28B does not have an LVD installed this should be changed to Disable Rectifier Information Check the rect
33. nergizes Relay 1 and turns on the ALM1 LED on the control unit front panel DISPLAY SCREENS DEFAULT SETTINGS Sys LT Alm m Minor Rect Cfg Alm m Minor Rect lofN Alm m Minor Rect 20fN Alm m Major Hw Sys V Alm m Minor Batt C Alm m Minor Batt T Alm m Minor Sys T Alm m Minor Alarm Item 1 Batt LV Alm On m Alarm Item 16 Store Cfg Disable Lamp Test mt OFF Test Relay En mt Disable Test Relay 1 mt OFF 29 MX28B 400 24V Product Manual Table 6 4 1 Parameter Locations Descriptions and Default Values PARAMETER DESCRIPTION Test Relay 6 1 SYSTEM DIAG Test Minor Relay 1 SYSTEM DIAG Test Major Relay 1 SYSTEM DIAG BATTERY SETUP Float Voltage 1 BATT PARAM Maximum Recharge Current 1 BATT PARAM Compensation Method 1 BATT COMP Temperature Compensation 1 BATT COMP Compensation High Knee 1 BATT COMP Compensation Low Knee 1 BATT COMP Discharge Threshold 1 BATT SET ALM High Voltage Threshold 1 BATT SET ALM Low Voltage Threshold 1 BATT SET ALM High Temperature Threshold 1 BATT SET ALM Low Temperature Threshold 1 BATT SET ALM Battery Alarms Discharge Alarm 1 BATT SET ALM Setting this parameter to ON energizes Relay 6 and turns on the ALM6 LED on the control unit front panel Setting this parameter to ON energizes the Minor Relay and turns on the
34. nit fails The maximum rectifier communications response time allowed before a communications failure is declared NOTE This information can be viewed for each rectifier installed by using the horizontal arrow keys Displays the model number of the installed rectifier A display of the de output current for the individual rectifier The status will be ON if the rectifier has been forced into its current limited mode The status will be ON if the control unit is holding the rectifier in the standby mode The status will be ON if the rectifier fan has failed The status will be on if the rectifier output has failed This alarm indicates that a rectifier has been forced into the current limited mode This alarm indicates that the control unit is holding a rectifier in the standby mode This alarm indicates that a rectifier fan has failed DISPLAY SCREENS DEFAULT SETTINGS Batt HV Alm m Minor Batt LV Alm m Minor Batt HT Alm m Minor Batt LT Alm Minor Rect Fail Safem 27 00 V Rect Fail Commm 1 min Rect 1 Desc MRF28H27 Rect 1 Curr 24 9 A Rect CL Alm m nofN Rect Stdby Almm n of N Rect FF Alm m n of N 31 MX28B 400 24V Product Manual Table 6 4 1 Parameter Locations Descriptions and Default Values PARAMETER RFA Alarm 1 MODULES RECT SET ALM CIRCUIT BREAKER SETUP Breaker 1 Alias 1 MODULES CIRBKR ALIAS Breaker 24 Alias 1 MODULE
35. re measured within the control unit Battery current measured at the current shunt indicates discharge indicates charge Battery temperature measured by the optional battery temperature sensor probe System voltage is above the high voltage threshold System voltage is below the low voltage threshold The control unit temperature is above the high temperature threshold DISPLAY SCREENS DEFAULT SETTINGS Display Type 000255 Date DEC 16 1999 Sys HV Thr 28 00 V Sys LV Thr m 25 00 V Sys HT Thr m 70 0 C Sys Voltage 27 00 Sys Current 145 8 Batt Current 15 0 Batt Temp Sys HV Alm Minor Sys LV Alm Minor Sys HT Alm m Minor 990 9218 MX28B 400 24V Product Manual Table 6 4 1 Parameter Locations Descriptions and Default Values PARAMETER System Low Temperature 1 SYSTEM SET ALM Rectifier Configuration 1 SYSTEM SET ALM Rectifier Fail 1 of N 1 SYSTEM SET ALM Rectifier Fail 2 of N 1 SYSTEM SET ALM Hardware System Voltage 2 SYSTEM SET ALM Hardware Battery Current 2 SYSTEM SET ALM Hardware Battery Temperature 2 SYSTEM SET ALM Hardware System Temperature 2 SYSTEM SET ALM Hardware LVD 2 SYSTEM SET ALM SYSTEM ALARMS DISPLAY Alarms Item 1 Alarms Item 16 ALARMS Store Configuration SYSTEM DIAG Lamp Test 1 SYSTEM DIAG Test Relay Enable 1 SYSTEM DIAG Test Relay 1 1 SYSTEM DIAG 990
36. ritten consent from APC DC Network Solutions Inc 2 APC DC Network Solutions Inc reserves the right to void the warranty if identification marks or serial numbers have been removed or tampered with or the defect is determined to have been caused by misuse neglect improper installation environmental conditions non authorized repair alteration or accident 3 This warranty does not cover physical damage due to the acts of nature or man that stress the equipment or component s beyond design limits and exert undesirable influence aside from normal wear and tear 990 9218 5 MX28B 400 24V Product Manual 4 APC DC Network Solutions Inc assumes no responsibility for any work accomplished or expenses incurred except with expressed written consent from APC DC Network Solutions Inc 5 APC DC Network Solutions Inc shall not be liable to the user purchaser or any third party for indirect incidental or consequential damages such as but not limited to loss of use loss of profits costs associated with removal installation of a defective product s or component s arising out of the sale or relating to the use of this product and the user purchaser assumes responsibility for all personal injury and property damage resulting from the handling possession or use of the product In no event shall the liability of APC DC Network Solutions Inc for any and all claims including claims of breach of warranty or negligence exceed the purch
37. tate Alarm Terminals OPEN NO C CLOSED NC C Table 5 6 1 External Alarm Input Definition rable 5 6 2 shows the external alarm input connection designations Connector J4 is located on the interface card mounted in the top left side of the unit Systems are shipped with jumper wires connecting each NC and corresponding C contact A jumper wire should be removed only if the corresponding NC C contacts are going to be used EXTERNAL J4 TERMINAL ALARM DESIGNATION USER ALARM NOTES INPUT NO NC C NOI NCI CI NO2 NC2 C2 NO3 NC3 C3 NO4 NC4 C4 Table 5 6 2 External Alarm Input Connections 5 6 2 Alarm Outputs There are eight alarms available that provide outputs via Form relay contacts The last two of these are pre assigned as the Minor and Major alarm outputs The Major relay is energized NO C contacts closed during normal non alarm operating conditions all the other relays energize when an alarm condition occurs The other six outputs are initially designated as Relay 1 through Relay 6 the user may assign more meaningful names if desired The various system alarm conditions can be assigned to any of the eight alarm outputs able 5 6 3 shows the alarm output connection designations Connectors J1 and J2 are located on the interface card mounted in the top left side of the unit The relay contacts should only be used to switch resistive loads of 0 5 amperes or less at 60 volts or less 18 990 9218 MX28B 40
38. xamination or b for non returnable systems and equipment notice to wait until an APC DC Network Solutions Inc authorized service representative arrives at the site to inspect the equipment Repaired or advance replacement modules or circuit components will normally be available within 24 to 48 hours of receipt of equipment or RMA 3 1 2 Warranty Repair or Replacement If during the warranty period the supplied equipment is found to be physically or electrically faulty due to defective materials or workmanship on the part of APC DC Network Solutions Inc the defective product s or component s will be repaired or replaced at the sole option of APC DC Network Solutions Inc without charge to the user for replacement materials or repair labor The procedure outlined above for contacting APC DC Network Solutions Inc must be followed Costs incurred for replacement installation including but not limited to installation equipment travel expenses of an APC DC Network Solutions Inc representative s and costs of installation material transportation expenses are not the responsibility of APC DC Network Solutions Inc Any replacement product s or component s shall only complete the remaining unused portion of the original warranty of the replaced product s or component s 3 2 Exclusions and Limitations 1 This warranty applies only to the original US domestic purchaser user and is not transferable internationally except with expressed w
39. y of 208 220 240V ac single phase 50 60 Hz power through individual external 20 amp two pole circuit breakers to the ac input terminal block connections for each rectifier in the system The ac wiring from the ac input terminal block connections to the hot pluggable ac input connector for each rectifier is factory installed The ac input enclosure located at the top right rear of the MX28B housing is provided with two one inch conduit entry holes and an access cover Inside a terminal strip s for ac input power connection and a separate Earth Ground bar for connection of the safety ground wire s are provided The terminal block s is labeled as Position 1 through Position 4 Position 1 through Position 8 for the 400 amp unit with each position having inputs designated L1 and L2 for connection of the two ac wires Positions 1 4 correspond to the top rectifier shelf positions from left to right Positions 5 8 are applicable to the 400 amp unit only and correspond to the lower rectifier shelf positions from left to right The suggested wire size is 10 AWG rated at 90 C or higher however the ambient temperature and number of wires in a conduit must also be considered in accordance with NEC requirements It is suggested that feeds for four rectifiers 8 wires and one safety ground wire be run in a one inch conduit however be sure to follow any local electrical wiring codes If the ac input power is provided from a three ph
40. ys readings in C Hardware revision level of the control unit Version number of the control unit firmware NOTE Actual firmware version number displayed is the current version as of the date of manufacture Fahrenheit m OFF Cntrl Rev t 000002 FW Version 000131 27 MX28B 400 24V Product Manual Table 6 4 1 Parameter Locations Descriptions and Default Values PARAMETER Display Type SYSTEM SETUP Date Time Setup Date 1 SYSTEM DATE Time 1 SYSTEM DATE Alarm Threshold Setup High Voltage Threshold 1 SYSTEM SET ALM Low Voltage Threshold 1 SYSTEM SET ALM High Temperature Threshold 1 SYSTEM SET ALM Low Temperature Threshold 1 SYSTEM SET ALM System Status System Voltage STATUS System Current STATUS System Temperature STATUS Battery Current STATUS Battery Temperature STATUS System Alarms System High Voltage 1 SYSTEM SET ALM System Low Voltage 1 SYSTEM SET ALM System High Temperature 1 SYSTEM SET ALM 28 DESCRIPTION Type number for the control unit display System High voltage alarm threshold System Low voltage alarm threshold Over temperature alarm threshold Under temperature alarm threshold System output voltage measured between the MX28B dc power plant 48V and return buses The total system output current calculated as the sum of the individual rectifier output currents System temperatu
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