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NEVO+1200Series User Manual

1. 0 15 Pa LV AC Temp 40 114 Pm 2200240 Tern 40 44 a4 Mechanical Dimensions and Mounting MECHANICAL DIMENSIONS AND MOUNTING SCREWS SCREWS LOCATION DETAILS PENETRATION TIGHTENING MOUNTING 4mm max including chassis 0 75 NM OUTPUT MODULES HOO Sh deba Heels He Defined by screw 0 75 NM CHASSIS LID AND FACEPLATE a ROS At Defined by screw 0 75 NM 2 A A gt a gt O ct y J E E W Y ay 5 7 Y Ce CY 2 AN W E gt N n r E o _ KN Si O amp gt a i e e 132 40 0 50 a 6 Eu En _ O ION N a i INS WE o P Y g _ E fr N a A lt A NIS NY o L a ON a aN Y E 54 50 1 01 9 O a w AA E
2. by adjusting the potentiometer above the negative output terminal Turning the potentiometer clockwise adjusts the output voltage upwards and anti clockwise adjusts the output voltage downwards Positive output terminal Negative output terminal J e For dual output modules there are two potentiometers one for each output To adjust the output voltage of the top output measure the voltage between the top positive and top negative terminals and adjust the top output potentiometer to the desired output voltage To adjust the output voltage of the bottom output measure the voltage between the bottom positive and bottom negative terminals and adjust the bottom output potentiometer to the desired output voltage Turning the potentiometer clockwise adjusts the output voltage upwards and anti clockwise adjusts the output voltage downwards Top Output Potentiometer Bottom Output Potentiometer Top Output Negative terminal Top Output Positive terminal 2 AO 1 Bottom Output Negative terminal Bottom Output Positive terminal When all output voltages are adjusted to the desired voltages switch off the supply power and attach all other cables The unit is now ready for use If the power supply is configured for the first time or if it has to be moved to a different location prior to operation switch off the supply power and remove the mains power
3. i 146 75 0 50 i l o a O o 18 30 mooo o M 4X 4mm depth max Y o TT o IT 28 21 o o i Y Gig i o TT 39 60 l e i E Y 12 10 l o i 98 60 Connectors PIN Assignments J2a b NE NI Slot A and E a onera Se 4 Inhibit BandF p Hoed U Slot 6 mhibit CandG Slot 8 Inhibit DandH 9 Global Inhibit AC OK o 11 5V 1A Bias Supply EN EOI EA J6 Shut Down REF DETAILS MAINS INPUT 3 Pin Barrier 6 32 Steel Screws 0 8NM or 7IN LB Torque Cable 14 18AWG 300V 16A 105 C use appropriately rated fork or ring terminal J2a b GLOBAL SIGNALS 12 Pin 2mm with Friction Lock 24 30 AWG MOLEX 511101260 503948051 CONNECTORS 12 dl J6 INPUT BIAS OUTPUT SIGNALS 6 Pin 1 25mm with Friction lock 28 32 AWG Notes 1 Direct equivalents may be used for any connector parts 2 All cables must be rated 105 C min equivalent to UL1015 MANUFACTURER MOLEX 510210600 500588000 TERMINAL Configuring Your Nevo Product The Nevo 1200 power supply is designed to be used as part of an end system in a restricted environment and therefore should only be accessible to quali
4. NEVO 1200Series User Manual The NEVO series user manual has been prepared by the Vox Power design team to assist qualified engineers in correctly designing in theNevo 1200 product into their applications to achieve the best reliability and performance possible At time of printing the information contained in this document is believed to be correct and accurate However specifications are subject to change without prior notice and Vox power will not be liable for any damage caused as a result of the information contained in this document For continued product documentation improvement please report any errors contained in the document to Vox Power Ltd NEVO 1200 Series Overview The Nevo 1200 switch mode power supply series offers truly unrivalled power density providing 1200W at 22W in in a 6 x6 x1U package It is the ultimate power solution for system designers as they address the demand for more power in less space Providing multiple isolated outputs the series carry full UL60601 ED3 NEVO 1200M and UL60950ED2 safety approvals A standard Nevo 1200 product configuration consists of an input module together with up to eight fully isolated output modules Single output modules have advanced remote voltage and current programming functionality as standard While dual output modules allow for up to sixteen fully isolated outputs The input module delivers up to 1200W of output power and has 8 slots each capable of delivering up t
5. Vi_ out 0 6 Lout Irated 1 25 where Irated is the maximum rated current for the module Slanals y g Signals Note that the Icontro output voltage is representative of the internal inductor current not the actual load current However this will only have an influence during dynamic events It is recommended to add an external amplifier as shown above left when using the Icontro signal to measure the output current as loading the Icontro signal even with microamps can cause the current limit to be reduced If it is required to measure the output current and adjust the output current limit simultaneously this can be achieved by using a clamp circuit instead of a voltage source to adjust the current limit while continuing to use an amplifier to measure the output current An example circuit is shown above right In this case Vetri will control the current limit while the amplified Icontro signal will provide a measurement of the output current Remote Sensing Remote sensing is available on all output modules and can be used to compensate for a voltage drop in the power leads connecting the power supply to the load To implement remote sensing connect the positive sense pin S connector J5 2 to the positive side of the remote load and the negative sense pin S connector J5 1 to the negative side of the remote load The voltage will be regulated at the points where the sense cables are connected Active protection agains
6. EMI filter attenuates high frequency current emissions to levels below EN55022 class B It also provides single pole fusing in the live conductor and protection from line disturbances as outlined in EN61000 Inrush current is controlled by a resistive element upon initial connection to the AC line Once the internal capacitances have been charged the resistive element is bypassed to reduce losses Active Power Factor Correction PFC is used to ensure an accurate input current waveform with extremely low harmonic content exceeding the requirements of EN61000 This stage also provides active input current limiting which prevents overloading of the input stage while maintaining high power factor The output of the PFC stage charges the hold up electrolytic capacitors which store enough energy to allow the Nevo 1200 configuration to continue operating during minor line disturbances These are the only electrolytic capacitors in the Nevo 1200S M power supplies Long lifetime and high temperature capacitors are used which ensures extended lifetime and product reliability A highly efficient zero voltage switching circuit is used to drive the isolated transformer from the hold up capacitors The output modules connect to the transformer secondary and provide safe isolated power to a high performance synchronous rectifier power converter This power converter is controlled using the latest analog control technology to produce superior output performance in a
7. MOSFET must be used on each output to prevent a device failure from causing a system failure However the diode introduces voltage drops between the supply and the load that significantly degrade the load regulation To counteract this the remote sense lines can be used to regulate the voltage at the load as shown below Output Module Output Module Typically this configuration can damage the internal sense resistors used within a power supply However the NEVO outputs have integrated protection to prevent this type of damage and are completely N 1 compatible without any additional external protection circuitry Note that only the positive sense terminal is protected and diodes should be used in the positive connection only Paralleled Remote Voltage Current Adjustments The simplest way to achieve remote voltage current programming with paralleled outputs is to operate the modules in share parallel mode Follow the procedure outlined earlier to configure the outputs in share parallel mode and once configured in this mode all the V control and COM pins can be connected together Remote voltage current programming can then be performed exactly as with a stand alone module It is not recommended to use remote voltage current programming in normal parallel mode We Output Module 1 lout 3 Vtrim COM te We Lo u LELLI Output Module i a lout lout Vtrim Vtrim WARNING Care m
8. miniature size Input Module Operation Startup amp Shut Down The NEVO input module operates from a universal input voltage range and starts automatically upon application of adequate AC mains voltage gt 84Vrms After a short delay the global 5V bias supplies start and the ACOK signal goes high to indicate that the mains voltage is present and input stage is operating correctly Once the ACOK signal is high the output modules turn on and deliver power to the application loads The power good signals will indicate that the output voltages are within specification The diagram below shows the normal start up shut down sequence and gives typical timings AC Maine Output Voltage Power food Typical timing values tp 300 ms t2p 50 ms t3925 ms ta 15 ms ts 5 ms minimum tep 100 ms When the AC mains voltage is removed the internal hold up capacitors will supply power to the load for typically 20 ms t ts at maximum power The ACOK signal will go low at least 5ms before the output voltages fall below the power good threshold level This allows the application to prepare for the impending loss of power The 5V bias supply will remain on for typically 80ms after the output modules have turned off Hold up For short line distubances lt 20ms the output voltages will not be affected However the ACOK signal may still go low to warn that there is an impending loss of output power The ACOK signal will return to the high st
9. side of the input connector Do not remove the two screws on the outer edges of the faceplate Proceed to remove the 6 screws on the sides 3 each side and 17 on the top 2 for each slot and 1 in the centre just below the product label The lid can now be removed Ensure that all the output modules are loose from the lid before removing the lid For new front end configurations there will not be any output modules in place Where ever blanking plates are inserted top screws do not need removing Top Screws for Modules x 16 Top Screws for Modules x 16 E ae J Top Screw center of unit x1 Ca Qs _ Blanking Plate D O Ov Longer Screw x2 a l Input Signals Jo Top Insulator gt le ae S Global Signals J2b Input Connector Side screw x3 each side a Shorter Screw x2 Winding Board Connection o a gt gt Global Signals J2a Output Module WARNING Do not remove the Top Insulator STEP3 Once the lid is removed modules can be inserted removed and replaced as required The 15 pin header on each of the output modules can plug directly into any of the eight 15 pin sockets on the winding PCB Each 15 pin header is keyed to prevent improper insertion When inserting an output module ensure all 15 pins fit into its corresponding hole on the winding PCB and then ensure the output module is pushed down properly There should be a gentle latch once the module is prope
10. the hiccup voltage threshold Vuiccup the module enters short circuit protection mode In this mode the output module uses a hiccup scheme to reduce system losses and potential damage When in this mode the output will be enabled for approximately 3 of the time disabled for 97 and will attempt to restart at approximately 125 ms intervals The module remains in this state until the short circuit condition is removed at which point the module returns to normal operation Reverse Current Protection RCP The standard output modules use synchronous rectification in the output stages to achieve high efficiency and as a result the outputs can both source and sink current The sink current is internally limited to approximately 6 of the maximum rated current However in applications where the output modules are connected to external power sources such as batteries or other power supplies certain precautions must be observed to prevent damage to the unit The outputs should never be directly connected to to external power sources without some form of reverse current protection such as an external diode or controlled mosfet If protection is not used large reverse currents which will ultimately result in damage to the unit will occur especially when the AC mains is disconnected Output Module Average and Peak Power All modules have an average and peak power rating The average power of each unit must at all times remain below it s specified limi
11. the power supply as this can cause a fire hazard The power supply does not contain any user serviceable parts and should be returned to Vox Power for repair Approval Limitations NORTH AMERICA When this product is used with 180VAC 253VAC mains where no neutral is present connect the two live wires to L Live and N Neutral on the input connector WARNING Series connected modules with combined voltages exceeding 60 volts are not considered SELV Paralleled and or series modules with combined energy ratings greater than 240 VA may cause energy hazards The equipment manufacturer must provide additional and adequate protection to service and technical personnel Always remove the power before handling the unit During operation the external surface of the unit can become hot Leave to stand for 10 minutes to allow the unit to cool down before handling the unit Dangerous voltages are present within the power supply Covers may only be removed by qualified personnel when the power supply has been disconnected from the mains supply voltage for more than 2 minutes Covers must be replaced and all screws secured properly before reconnecting to the mains voltage Parameter Details in Max nits Isolation Voltage Input to Output 4000 Vac Input to Chassis 1500 Vac Output to Chassis 250 Vdc Output to Output 250 Vdc Isolation Clearance Primary to Secondary Reinforced 7 mm Primary to Chassis Basic 2 5 mm Isolation Creepage Primary to Se
12. 160Vrms for each output module 3 Sum the values from step one and two for each output module 4 Calculate the average efficiency for the total system Step Slot A Slot E Slot C Slot D Slot E SlotF SlotG SlotH OP1 OP OP2 OP2 OP3 OP3 OP4 OP4 1 Saloane 036 ose Oeo 089 0 895 0 895 0 86 0 86 2 BBs D015 0 015 0 015 0 015 FEES 0 875 0 875 Eave E 2 3 4 7 i Es 5 7 8 8 0 86375 Signalling Output Signals The NEVO 1200 has two isolated output signalling sections arranged in groups the first covers slots A to D and the second covers slots E to F To reduce cabling in the end system all major input and output signals and the global 5V bias supply for each group are wired to a single signals circuit that is accessed through the connectors J2a and J2b located at the output side of the chassis as shown in the diagram below o t 1 MOLEX 87833 1220 11 Description i Description Power Good Inhibit Power Good Inhibit Power Good Inhibit Power Good Inhibit Group 2 inhibit Slot E F AC mains signal Global 5V Bias Common Power Good Inhibit Power Good Inhibit Power Good Inhibit Power Good Inhibit Group 1 inhibit Slot A D AC mains signal Global 5V Bias Common Slot A Slot E Slot B Slot F Slot C Slot G Slot D Slot H O DOAN DU BB QQ N EP Oo ON ADU BB OY N EP Rp Rh O Rp Rh pl N pl N All of the signals are referenced t
13. A and Slot D each time ensuring the measurement is between 10mV and 10mV By using the OP1 module in Slot A as your reference continue with this mV measurement procedure until all the modules that are to be paralleled are measured Once all the output voltages are adjusted to the desired levels switch off the main supply voltage Connect the positive link between the positive output terminals of the four OP1 modules Always apply force only in a direction parallel with the output terminals to prevent any accidental bending of the output terminals Make sure both links are properly pushed in In some cases more accurate current sharing may be required For more accurate current sharing pin 4 of the J5 connectors of each modules need to be connected together To achieve this connection Vox Power has a range of current sharing links available Safety The NEVO unit has been designed to comply with the Low Voltage Directive DIR 2006 95 EC LVD the EMC Directive DIR 2004 108 EC and DIR 2011 65 EU regarding the restriction of certain hazardous substances and is CE marked to show its compliance When correctly installed according to the installation manual in a limited access environment the NEVO 1200S amp M comply with the requirements of EN60950 2 Edition and EN60601 3 Edition respectively The power supply should not be operated close to combustible materials or atmosphere Care should be taken to ensure liquid or metal shavings do not enter
14. PARE For radiated and conducted emissions compliance of the final system relies on proper installation of the PSU component The installation guidelines detailed below should be followed Installation Guidelines for EMC NEVO units should be mounted within a metal enclosure using the mounting fixtures provided If the application enclosure is not metal then a metal ground plate should be used to mount both the power supply and the load Decoupling the loads to the chassis or ground plate with suitably rated 100nF capacitors can assist in reducing emissions Both input and output cables should be fixed as close as possible to the ground plate or metal enclosure Also input and output cables should be separated as much as possible Output power and sense cables should be twisted pairs and routed parallel to each other Do not twist sense and power cables together All cables lengths and loop areas should be minimised Where cables must enter or exit the enclosure good high frequency 100nF decoupling capacitors of sufficient voltage rating should be connected to the cables as close to the entry exit point as possible For further details or assistance contact Vox Power Reliability The NEVO 1200 series has undergone extensive testing including HALT and Environmental testing Reliability data is collected on an ongoing basis Please contact Vox Power or your distributor for the most up to date reliability data Vox Power Ltd rese
15. Slot A and B with the series link shown separately For example if there is a requirement for 80Vdc it can be achieved by connecting two OP4 outputs in series By repeating steps 1 to 5 above insert two OP4 output modules one each in Slot A and B or any other slot as the configuration requires Adjust each of the OP4 output modules to 40Vdc as per step 5 Connect the two OP4 output modules in series using the series link The series link connects the negative output of the OP4 output module in Slot A to the positive output of the OP4 output module in Slot B Measure the output voltage between the positive output terminal of OP4 in Slot A and the negative output terminal of OP4 in Slot B You should measure 80Vdc For more information on how to connect two or more modules in series please see the Series Connected Outputs section in the Nevo Series Installation Notes WARNING Energy and voltage hazards may arise when individual modules are series connected When safe energy and voltage levels are exceeded ensure that an appropriate warning label is affixed to the power supply in a manner that service personnel will always notice it See the Safety section for more details Paralleled Connected Output Modules NEVO output modules of the same type can be paralleled in any number within the same chassis to achieve higher output currents For best performance the output voltages of each paralleled module should be adjusted to the same
16. Vmax as specified in the power profile table above A clockwise rotation of the potentiometer results in an increase of the output voltage while an anti clockwise rotation results in a decrease of the output voltage 2 Remote Voltage Programming Using remote voltage programming the output voltage may be adjusted beyond the Vuin and Vmax range specified in the power profile table above However certain precautions must be taken to ensure correct operation Please see the Advanced output module features section for more details Over Voltage Protection OVP In the event of an output module fault the modules are protected against excessive output voltages This is implemented as a fixed voltage threshold Vovp in the table above and if the output voltage exceeds this threshold the entire chassis will be latched off To resume operation of the unit disconnect the AC input voltage for 20 seconds remove the faulty output module and reconnect the AC input voltage Note that no warning is given on the AC_OK signal for faults of this type Over Current amp Short Circuit Protection OCP amp SCP For increased safety and reliability all output modules in the NEVO series have over current and short circuit protection The over current threshold is typically set at 120 of the rated current and has a constant current straight line characteristic that reduces the output voltage as the load resistance decreases If the output voltages falls below
17. and adjust to the desired voltage by adjusting the potentiometer below the positive output terminal top terminal Example 2 Configuration of a paralleled output Nevo 1200S 11112340 With the four OP1 s in parallel to create one 3 30Vdc output capable of up to 100A Complete the configuration as described in Example 1 above In order to create a single output capable of delivering up to 100A the four OP1 modules in Slot A to Slot D should be connected in parallel Connect the negative parallel link between the negative output terminals of the four OP1 modules Do not connect the positive link as this stage As per step 5 above measure the output voltage of the OP1 output module in Slot A and adjust the output voltage to 3 3Vdc Repeat for the OP1 modules in Slot B Slot C and Slot D For best performance the output voltages of the four OP1 modules need to be adjusted as close as possible to one another Switch the measuring device to a smaller measuring scale For example if a digital multi meter is used switch it to the mV scale Measure the voltage between the positive output terminals of the two OP1 modules in Slot A and Slot B It is recommended that the voltage measurement between the positive output terminals measures between 10mV and 10mV Carefully readjust the OP1 output module in Slot B if required until the mV measurement falls within the recommended range Repeat this measurement between Slot A and Slot C and then again between Slot
18. ased After a period of t the PSU will shut down and stay latched in that state until the 5V is applied to the SD pin for a period of tzand released for a period of t4 The PSU will then resume normal operation This operation is perfect for push button or microcontroller on off control using the recommended circuits below ow JE a di Gi SHUTDOWN CIRCUIT 1 SHUTDOWN CIRCUIT 2 SHUTDOWN CIRCUIT 3 AUTO START PUSH TO START MICROCONTROLLER All pins on the J6 connector are isolated to the following specification J6 Signals isolation voltages Signals to Input 4000 Signals to Chassis 250 Output module operation Power Profile The power profile diagram below is a voltage current plot that together with the associated table provides details of the main features of the currently available output modules Parameter OP1 OP2 OP3 Vnom V dy Vein V Vmax V Vovr V TRATED A El E locp A gt Vhiccup V JE T Ihiccup A z E Praten W Ppeak W Hiccup Current Output Voltage Adjustment Each output can be adjusted within the range as described in the table above or in the datasheet Voltage adjustment can be achieved by two methods 1 Manual potentiometer adjustment Using the manual adjust potentiometer the preset output voltage Vser of each output module is adjustable over the entire range Of Vmn to
19. ate once the unit has recovered from the disturbance Outputs that are adjusted above the hold up voltage as detailed in their respective datasheets may experience a dip in voltage but never below the hold up voltage specified Idle power Standby Power Consumption The idle power of the NEVO 1200 series PSU is extremely low when compared to similar configurable power supplies With the output modules enabled the unit typically only requires 46 W with no output load To reduce the idle power further the outputs can be disabled using the global inhibit GINH pins With the outputs disabled the unit typically requires less than 36 W When the unit is in the latched off SHUTDOWN state the idle power is less than 5W Typical Value 3W Over Temperature Protection OTP The input module is protected from excessive temperatures by means of various internal sensors If temperature thresholds are exceeded the entire unit may latch off with no ACOK warning To re enable the unit the AC mains must be disconnected for approximately 20seconds Over Power Protection OPP The input module is protected from excessive power by means of a hiccup mode over power protection circuit The threshold for the protection is approximately 120 of the rated power If this threshold is exceeded the unit will shutdown for a short period before recovering automatically If the overload remains this process will repeat indefinitely Power De Rating The NEVO 1200se
20. cable from the power supply Ensure the configured unit is safely packaged into the original packaging or into appropriate alternative packaging before moving it to its operational location TROUBLESHOOTING In the unlikely event that one or more of the green LED lights on the output modules stay off once the supply power is switched on it may be that there is a problem with the power supply Please contact Vox Power for assistance WARNING Leave the unit to stand for a minimum of 3 minutes after removing all power and other connections from the unit before attempting to configure or re configure the power supply WARNING Always remove the power before handling the unit During operation the external surface of the unit can become hot Leave to stand for 10 minutes to allow the unit to cool down before handling the unit WARNING Dangerous voltages are present within the power supply Covers may only be removed by qualified personnel when the power supply has been disconnected from the mains supply voltage for more than 3 minutes Covers must be replaced and all screws secured properly before reconnecting to the mains voltage WARNING Do not apply power to the power supply before replacing the lid and securing all the screws Series Connected Output Modules NEVO output modules of the same type can be series connected to achieve higher output voltages Below is an illustration of how to series connect two output modules in
21. condary Reinforced 12 mm Primary to Chassis Basic 4 mm Leakage Current Medical 265 Vac 63 Hz 25 C 300 A Standard 265 Vac 63Hz 25 C 1500 5 Agency Approvals cURys Demko CB Certificate Standards IEC EN60950 1 UL60950 1 CSAC22 2No 60950 1 03 2 Edition IEC EN60601 1 3 Edition CE Mark DIR 2006 95 EC LVD the EMC Directive DIR 2004 108 EC and DIR 2011 65 EU Agency File Numbers UL E316486 EMC Compliance To support compliance of the final system design with the EMC directive 89 336 EEC the NEVO PSU has been designed and tested to the following standards Parameter Standard Level Emissions Radiated Emissions EN55011 EN55022 FCC A See Note Conducted Emissions EN55011 EN55022 FCC B Harmonic Distorsion EN61000 3 2 Compliant Flicker and Fluctuation EN61000 3 3 Compliant Immunity Electrostatic Discharge EN61000 4 2 15 kV air 8 kV contact 4 Radiated RFI EN61000 4 3 10 V m 3 Fast Transient Burst EN61000 4 4 4 kV 4 Input Line Surges EN61000 4 5 1 kV L N 2 kV L E 3 Conducted RFI EN61000 4 6 10 V 4 Power Magnetic field EN61000 4 8 10 A m 3 Voltage Dips amp Interruptions EN61000 4 11 EN55024 Compliant Note To meet Class B radiated emissions the end user should add ferrites to IP and OP cables Consult Vox Power for details Typical Conducted emissions Typical conducta EPA il id Wi M 1 i b i i al n up A lds i by Padi FEF E m Ld 7 li all PFruquinsy
22. ctions in this manual and all warning labels on the product must be adhered to carefully SAFETY The NEVO 1200S and Nevo 1200M series are designed in accordance with the safety requirements of UL60950 1 EN60950 1 IEC60950 1 UL60601 1 EN60601 1 EN61010 1 IEC60601 1 IEC61010 1 CSA22 2 no 601 1 and the LV Directive 2006 95 EC All Nevo 1200 series power supplies must be installed correctly in a controlled environment which restricts access to any un authorised personnel Equipment and system manufacturers must protect service personnel against unintentional contact with the output terminals DE RATING Temperature The input module and output module power must be de rated by 2 5 C above 50 C Input Voltage The input module power must be de rated by 10W Vrms below120Vrms 1200W 120Vrms 1000W O 100Vrms 900W 90Vrms Remember to take the appropriate de rating into consideration before specifying any Nevo 1200 power supply for an application If in any doubt please contact Vox Power directly or your local Vox Power representative HAZZARDS If series and or parallel combinations of outputs exceed safe voltage and or energy levels the final equipment manufacturer must provide the appropriate protection for both users and service personnel HEALTH AND SAFETY To comply with section 6 of the health and safety at work act a label that is clearly visible to service personnel must be placed on the final equipment These labels warn
23. fied and trained personnel Persons attempting to configure a unit must have the necessary knowledge and training before doing so Incorrect configuration may cause damage to the power supply and may affect the warranty of the power supply Output power modules may be added replaced or moved by strictly following the sequence of operations described below Please contact Vox Power or your distributor for assistance in configuring your power supply Never assume always ask STEP 1 If the power supply is being configured for the first time remove the front end unit from the packaging and continue to step two If the power supply is being reconfigured always adhere to the rest of this step Ensure the mains power connection is switched off and then disconnect the main power connection from the power supply Take care as the outer surface of the power supply may be hot Allow the power supply to cool down sufficiently before handling it Remove all other connections from the power supply If the power supply is mounted onto a base plate remove the screws attaching it to the base plate so that the power supply can be easily handled during configuration Once all the connections are removed let the power supply stand for 3 minutes before attempting to configure or re configure the power supply STEP 2 Removing the screws At the fan side there are 2 longer and 2 shorter screws remove only the two longer screws These are the two screws above and either
24. hat the output can be used as a modulated or constant current source Signals Output current control 0 8 Co 1h 1 3 Cutout current irarmalisedts rad 6 5 1 1 5 3 Control voltage In the diagram above Vi_out is an internal voltage source that is proportional to the internal inductor current and approximates the equation Vi out 0 6 Lout Trated 1 25 where Irated is the maximum rated current for the module In this configuration the output current limit will approximate the following equation limit Vetrl 0 6 Irateg 1 25 where Irateg is the maximum rated current for the module It is not possible to increase the maximum current limit of the module and control voltages Ver exceeding 1 53 V will have no effect on the current limit When using an output module as a modulated current source the output voltage should be manually adjusted to the maximum that will be required by the application and this will be the upper voltage limit Once the load is connected the output current can then be modulated by applying a control voltage as described above Note that the power good threshold level is fixed and defined by the manually preset voltage Hence while the output module is limiting or modulating the output current the PG signal may go low Output Current Measurement The output current of the module can be measured using the Icontro signal If this pin is not loaded its output voltage will follow the equation
25. ing module and require the use of multiple isolated control voltages to attain control over the full voltage range In practice individual control of each module is rarely required and a more straightforward method is to control all outputs simultaneously with a single control voltage With NEVO output modules this is achieved with the use of the Nevo Series Tracker Interface the datasheet for this interface is available from the Vox Power website e www vox power com By using the series tracker interface all modules in a series can be controlled by a single control voltage that can be referenced to the COM 35 5 pin on any module SELV Precautions Where series combinations of output modules exceed 60 V the output can no longer be considered SELV Safety Extra Low Voltage and hence the final equipment manufacturer must provide suitable protection for both users and service personnel Paralleled Outputs NEVO output modules of the same type can be paralleled within the same chassis to achieve higher output currents WARNING Energy Hazards may arise when individual modules are paralleled See the Safety section for more details For best performance the output voltages of each paralleled module should be adjusted as close as possible to one another Follow the procedure below to achieve the most accurate results Output Module Output Module Output Module B e S We V 3 lout Voltmeter Voltmeter 1 C
26. nput voltage Note that no warning is given on the AC_OK signal for faults of this type Transient Response The NEVO output modules have been especially designed to have high reliability To achieve this all electrolytic capacitors have been eliminated from the design As a result of this high dynamic load transients can cause relatively high voltage deviations at the output and although the outputs have a very high loop bandwidth with typical recovery times of less than 100us the voltage deviations may still be excessive for some applications An example application is detailed in the diagram below and shows typical responses at the terminals of the output module and at the load Notice that the voltage deviation due to cable inductance exceeds the module response and hence a capacitor located at the module terminals will have little effect at the load The optimum solution is to locate a low impedance electrolytic capacitor at the load which will eliminate the inductive cable drop and also reduce the typical voltage deviation at the module Tasa poder cabled Lang lt D Erm Maaturamnecd A B wiih EL CAF Maaturamerd 31 E Ho EL CAF Haajurement ata Mio EL GAP Yolh wea mri Fan a Advanced Output Module Features Remote Voltage Programming External Voltage Control The output voltage of the module can be adjusted using an external voltage source connected between the COM and Vcontrol pins on the signals connecto
27. nt from the other outputs but this will not exceed 6 of each modules maximum rated current Typically system reliability is reduced in this mode as the higher adjusted modules will do most of the work with the lower adjusted modules only delivering current during peak load demand Share Parallel Mode In Share parallel mode the outputs are paralleled as before and the I control pin of each module connected together as shown in the diagram below a Duoi Medule Dubput Modis Cutout Module A E Be Ye Y S let Ds ve S lotri Se Ve V S letri Volts Connecting the I control pins together forces all the outputs to deliver the same current ensuring that the system reliability is maximised and the work load is distributed evenly across all paralleled modules In this mode the lowest adjusted output module will determine the actual output voltage and all higher adjusted outputs will reduce their voltage There may be a small amount of circulating current between the modules approximately 6 of the maximum rated current for each module The current output signal I control can still be used to measure the output current but it must be scaled by N where N is the number of paralleled modules WARNING Care must be taken to avoid differential voltages between the negative power output terminals of the paralleled modules as this can cause errors at the control pins To avoid this it is
28. nty conditions Vox Power products are not intended for use in connection with life support systems human implantations nuclear facilities or systems aircraft spacecraft military or naval missile ground support or control equipment used for the purpose of guidance navigation or direction of any aircraft spacecraft or military or naval missile or any other application where product failure could lead to loss of life or catastrophic property damage The user will hold Vox Power harmless from any loss cost or damage resulting from its breach of these provisions PRODUCT LABELS The external product label contains information relevant to the power system The label contains input voltage maximum input current input frequency maximum output power fuse rating and type serial number approvals and product part number in format NEVO 1200X ABCDEFGH ZZZ NEVO OUTPUT MODULES Each output module label contains information relevant to that particular output The label contains voltage adjustment range maximum output current serial number approvals and the part number in format OP X OTHER General installation parameters A label warning that external surfaces are hot during operation and that the unit should be allowed to cool down properly should be placed on the unit where such a label is clearly visible The NEVO 1200 series is designed to comply with EMC standards but it does not imply that the end system will comply To prolong the life
29. o 150W Two 5V 1A medically isolated bias supplies an AC_OK signal and a global inhibit signal that can disable all outputs simultaneously are standard features of a NEVO configuration An additional always on 5V 0 5A bias supply is provided which enables a fully latched shutdown feature to be implemented on the primary power converter In this mode both fans are off and the power consumption is below 5Watts Typical Value of 3 Watts Output modules are available in a range of output voltages to suit all applications Single output modules with voltage ranges from 1 5V to 60V currents up to 25Aandparalleling and series capability can result in a voltage range up to 480V and a maximum current of up to 200 Amps from a single Nevo 1200 configuration Dual output modules have a voltage ranges from 1 5V to 15V and currents up to 5A with series capability By selecting the correct output modules a custom power solution can be configured in a few minutes This fast custom solution offers industry leading power density and total system efficiencies of up to 89 This flexibility ensures the Nevo 1200 series suits all types of applications including medical industrial lighting aerospace military and telecoms Contents NEVO 1200Series OVEINVICW eneudianeused 1 Part Numbers and Ordering Information 3 Installation Notes sica 4 Theory OF Operation 6 6 pur Module ODerac ON si O O ds 7 A RO 10 Output Module Operation 13 Advanced Outp
30. o the relevant group bias supply common rail COM and external control and or monitoring circuits can be easily powered and interfaced to the PSU through these connectors Both entire signals circuits are fully medically isolated and can be considered a SELV output The table below lists the isolation voltages Signals isolation voltages Signals to Input Signals to Chassis Signals to Output Bias supplies 5V1 amp 5V2 Power The NEVO 1200 series has three separate isolated bias supplies one J6 located near the AC mains input connector J1 and two more located at the output side connectors J2a amp J2b Both output side bias supplies generate 5V and are rated up to 1A These supplies are available whenever the AC mains voltage is connected and the input module is operating correctly A shutdown through the SD pin on J6 or any of the following abnormal conditions will cause the entire unit to latch off and will disable both of these 5V bias supplies e Over temperature of any part of the unit e Over voltage on the output e Internal over current device failure AC Mains Signal ACOK Output An ACOK signal is provided on each output group to indicate to the user that the AC mains voltage is applied and the input module is operating correctly The output signal is driven from an internal operational amplifier as shown in the following diagram Under normal operating conditions this signal gives a warning of 5ms before the ou
31. of the unit use in dust free environment Units can sometimes be damaged during transit In the event of transit damage DO NOT connect power to the unit Contact your sales agent or Vox Power Always use adequately sized cables and ensure good crimp connections Use cable supports to minimise stress on connectors Avoid excessive shock or vibration Equipment class Installation category Pollution degree Material group Flammability rating IP rating RoHS compliance I II 2 IIIb Indoor use only 94V 2 IP10 2002 95 EC Theory of Operation The diagram below outlines the topology and major internal components of a fully assembled Nevo 1200 configuration Eight output slots are provided and can be populated by any combination of output modules The remaining components in the block diagram are housed in the input module TRANFORMER HOLDUP CAPACITOR OUTPUT SLOT H amp TRANFORMER DRIVER OUTPUT SLOTG OUTPUT SLOT F OUTPUT SLOT E 5V 14 BIAS 2 EMI FILTER ACOK PG SIGNAL OP INHIBIT amp OUTPUT SLOT D OUTPUT SLOT REINFORCED ISOLATION BARRIER OUTPUT SLOT B ACTIVE INRUSH ACTIVE PFC OUTPUT SLOT A 5V 14 BIAS 1 ACOK PG SIGNAL OP INHIBIT The input module is responsible for receiving the AC mains line voltage and converting it to an appropriate DC voltage whilst providing protection from AC line disturbances and preventing excessive EMI emissions and current harmonics The integrated
32. onnect all the negative power cables together Zi Adjust the first module A to the desired voltage 3 Connect a voltmeter between the positive terminal of the first module A and the positive terminal of the second module B and adjust the second module B until the voltmeter reads 0 000 volts 4 Repeat step 3 for the remaining modules always using the positive terminal of the first module A as the reference When paralleled the outputs can operate in two distinct modes Normal parallel mode or Share parallel mode Normal Parallel Mode For normal parallel mode the positive power cables should be connected together and the negative power cables should be connected together No other connections are required as shown in the diagram below xX 1 Output Woduis Gutput Module B Cc P Output Module A 5 Ve Y E bebri O ae a e v y E lairi B We Y ge en Amps In this mode the highest adjusted output module will supply all of the load current until its current limit is reached If the load demand exceeds this level the output voltage will drop to the level of the next highest adjusted module and that module will begin to supply the load current while the first module continues delivering full current This process repeats for the total number of paralleled modules The diagram above shows the VI curve for such a system Output modules that are not delivering current will typically sink a small amount of curre
33. ont End from the packaging At this point there are no output modules and no blanking plates OPO installed Remove the screws as shown below At the fan side remove only the two longer screws which are above and either side of the input connector Do not remove the two shorter screws which are located on the outer edges of the faceplate Next remove the 6 screws 3 each side at the side of the unit and 1 screw at the top of the unit Remove the lid NS Insert the modules as the configuration requires 1 OP1 module into Slot A Slot B Slot C and Slot D 1 OP2 module into Slot E 1 OP3 module in Slot E and 1 OP4 module into Slot F The Blanking Plate is inserted directly into the lid as shown below and should be done before putting the chassis lid back onto the chassis base IA ae F N ae 4 K gt gt CEN SK NOD W a SS 6 gt Z o AS Na A o a SS rad Y A 4 SS Z O NS ou 9 SS gt XA sE SS NP NX so Z EN AN NJ x ian ONJ YY ae Place the lid back onto the chassis base Ensure the PCB of each Output Module fits into the corresponding slot on the chassis lid Secure all the screws Once all the screws are fully secured attach the power cord and switch on the main supply voltage Ensure that the Green LED light on each Output Module comes on As per step 5 measure the output voltage of each output module
34. r J5 as shown below In this configuration the output voltage will follow the equation below Vo Vset 1 8 Vctrl 0 6 where Vset is the manual preset voltage of the module Oulpul voltage control hal signals to wael et Lo vout n Ierrralise i os l 5 E Moure The output voltage can be controlled from 0 to 300 of the preset voltage using this control method However care must be taken to ensure the output voltage does not exceeed the OVP level as this is considered a safety hazzard and will latch the entire unit off To determine the level of control voltage that will trigger OVP insert Vovp into the equation above Example Vovp 9 5V Vset 5V gt Vctrl 1 8 Vovp 0 6 Vset 0 66V Hence Vctrl should never fall below 0 66V otherwise OVP may latch the entire unit off Alternatively by manually adjusting the output voltage to less than 1 3 of the OVP voltage ensures that OVP can never be tripped by remote voltage control Also remote adjustment of the output voltage using the Vcontrol pin does not affect the preset power good threshold Hence remotely adjusting the output voltage below 0 9 Vset will cause the power good signal to go low Remote Current Programming External Voltage Control The output current limit of the module can be reduced using an external voltage source connected between the COM and Icontrol pins on the signals connector as shown below In practice this also means t
35. rating in turn and fill the result from the first calculation into the second calculation Example What are the NEVO 1200 input and output module de ratings at 60 C at 100V line Input module line de rating Prated 10W 120V Vin 1200W 10W 120V 100V 1000W Input module temperature amp line de rating Prated Temp 50 C 0 025 Prated 1000W 60 C 50 C 0 025 1000W 750W 150W Output module temperature de rating Prated Temp 50 C 0 025 Prated 150W 60 C 50 C 0 025 150W 112 5W Efficiency The efficiency of the configured Nevo 1200 product is dependent on parameters such as input line voltage load level and on the combination of output modules The plots below show typical efficiencies of a NEVO 1200 over the full load and line voltage range and fitted with four of each type of single output module equally loaded Typical Line Efficiency Pmax 150 1e EL JETI Et aes EOS Mi E 100 119 920 151 1920 970 414 110 AM 20 ZA ae SD Input soo ge fii Rane wah ORR aR o B Comoe pacer fy An estimate of the efficiency for any particular system may be obtained from these graphs using the procedure outlined in the example below Example Estimate the efficiency of an NEVO 1200 11223344 at 160Vrms input and 100W load on each output 1 Define load efficiencies for each output module at the specified load and 220V 2 Define change in efficiency from 220Vrms to
36. recommended that a low impedance connection be made between the negative power terminals close to the PSU output and cables then connected from this common point to the load Paralleling Across Multiple Chassis Paralleling across multiple chassis is not possible or recommended without external protection such as external diodes or controlled MOSFETs to prevent circulating currents between each chassis Failure to provide such protection may result in damage to the power supplies Consult Vox Power for details on how best to implement such applications When modules are paralleled across multiple chassis the outputs in each chassis will not be synchronised and the peak to peak output ripple may contain beat frequencies in the audio spectrum Parallel Remote Sensing Remote sensing can be used as normal with paralleled modules The sense lines S and S from each of the output modules should be connected together S to S and S to S as shown below This should be done close to the power supply output and a single pair of cables brought from these sense lines to the load Keeping cable lengths to a minimum and using twisted pairs where necessary will help reduce noise pickup in the sense lines Output Module Output Module Output Module A B c S Ve V S letri 5 V V S Ictri 8 W V S Ictri TOO N 1 Configurations When using N 1 redundant configurations a suitably rated diode or controlled
37. ries must always be operated within its stated operating limits Equipment manufacturers and other users must take the appropriate de rating into account when specifying a unit for the intended application If in doubt contact your sales representative or Vox Power for assistance There are two main de ratings forthNEVO 1200 series configurable power supplies i e temperature and input line voltage Temperature de ratings apply to both input and output modules while line de ratings apply only to the input module For temperature the de rating for both input and output modules is 2 5 of maximum rated power per degree Celsius above 50 C For the input line voltage the de rating for the input module only is 10W per volt below 120Vrms These de ratings can be calculated using the following conditional equations Line Derating Equation for line de rating of input module only If Vin lt 120V Pout Prated 10W 120V Vin E z ara LL 2 No Derating for DC operation a Otherwise Pout Prated Toy fT Input Voltage RMS Temperature Derating p ft NG o Equation for temperature de rating Of the input and output modules If temp gt 50 C P Prated Temp 50 C 0 025 Prated 5 error AN e O A T Pout Prated PO OO OO O O IO AO E To o Ambient Temperature Celcius Depending on the application conditions one or both of the de ratings may apply Where both apply calculate each de
38. rly inserted Repeat this step for each output module Never remove the plastic cover insulator on the front end of the unit Modules can be inserted into any desired slot However consideration should be given to arrange modules in a manner where cabling would least impede on exhaust airflow Top Insulator 15 Pin 15 Pin Socket Winding PCB STEP 4 Once the output modules are inserted and the new configuration is complete the lid can be closed again A blanking plate must always be used whenever a slot does not contain an output module It is easier to attach blanking plates to the lid before closing it Ensure the top plastic cover insulator is in place before closing the lid again When closing the lid ensure that each output module slots properly into its corresponding slot in the lid Insert all the screws and tighten to 1NM Do not over tighten Ensure each output module slots properly into the slot in the top of the lid STEP 5 Reconnect the power cable and apply power to ensure all the output modules are working by checking that the green LED light on each output module comes on Always measure the output voltage of each output to ensure it is adjusted to your requirements Measure the output voltage between the positive and negative output terminals or at the sense terminals on J5 of each output module Consult the datasheet for the pin out of J5 The output voltage of each output module can be adjusted
39. rves the right to change or improve any part of the specification electrical or mechanical design or manufacturing process without notice Please consult your local distributor or contact Vox Power to ensure that you have the latest documentation before using your product Document DOC6102 rev 00
40. set point or as close as possible For more accurate current sharing pin 4 of the J5 connectors of each modules need to be connected together To achieve this connection Vox Power has a range of current sharing links available Please discuss your requirements with your distributor or with Vox Power before ordering your unit For more information on how to connect two or more modules in parallel please see the Paralleled Outputs section in the Nevo Series Installation Notes following this section Below is an illustration of a mechanical connection to parallel connect four modules in Slots A D Connector sets to connect 2 3 and 4 modules in parallel are available from Vox Power For the Nevo 1200 unit a set of jumper links are also available By using these jumper links up to eight modules can be connected in parallel Connect jumper link as shown below and ensure the screws are properly tightened WARNING Energy and voltage hazards may arise when individual modules are paralleled When safe energy and voltage levels are exceeded ensure that an appropriate warning label is affixed to the power supply in a manner that service personnel will always notice it See the Safety section for more details Example Configurations Example 1 Configuration a unit for the first time Nevo 1200S 11112340 The below illustration take steps 1 to 5 above into consideration Remove the Nevo 1200S Fr
41. shutdown the outputs enter a high impedance state Where no external load is present it may take some time for the voltage to decay When driving inductive loads care must be taken to limit the voltage at the output terminals so as to prevent damage to the unit Synchronisation All output modules in the same chassis are synchronised The typical operating frequency is 260kHz and paralleled or series connected units will not produce beat frequencies Ripple and Noise The ripple and noise figures stated in the datasheet are defined based on a standard measuring method To obtain the same results the same test setup must be used and care must be taken to eliminate any parasitic noise pickup The diagram below shows details of the setup and also sources of noise pickup V 50 Ohm coax soldered directly across 1206 capacitor Use twisted Output pair lt 300rm Module AC Coupling 20M Pd Ferrite to reduce OM bandwidih Magnetic pickup Terminate with corrrmon mode noise l Minimise loop area 100nF ceramic 1206 not normally required VV 10uF tantalunvlowZ EL i Over Temperature Protection OTP Each output module is protected against excessive temperatures In the event of the internal temperatures exceeding safe levels the entire unit may be latched off To resume operation of the unit disconnect the AC input voltage for 20seconds ensure external ambient temperatures are within specifications and then reconnect the AC i
42. solator to the respective output modules The basic internal electrical circuit and timing diagrams are shown below Typically torr 100 us and ton 8 ms To inhibit each output module individually GINH for the relevant group should be connected to COM and 5V applied to the appropriate input INH1 2 3 4 5 6 7 8 To start with all outputs inhibited and then enable them individually GINH should be connected to 5V then pull down the appropriate input INH1 2 3 4 If GINH is left unconnected then all INH inputs will all behave as global inhibit inputs i e 5V on any INH input will disable all outputs in that group GINH 9 Vout INH1 2 te INH2 4 INH3 6 INH4 8 Inhibit COM 12 Input Signals The input side signals are located on J6 near the AC mains input connecter The signals consist of a 5V bias supply and a shutdown pin SD The input bias supply generates 5V is rated up to 0 5A and is Always on when the AC mains is connected regardless of whether the PSU has been shutdown Name Description Pin e eena s Reserved EM IA Reserved The sequence to shutdown and restart the PSU is shown in the timing diagram below J6 COM 1 V 2 SED A OPTO SD 3 A D COUPLER 5 aS 7 t gt 5mS tb lt 25mS t3 gt 5mS ta lt 600mS Internal circuit The SD pin is negative edge triggered To shut down the PSU during normal operation 5V must be applied for a minimum of t then rele
43. t However each output can deliver up to 150 of it s average power rating for a maximum of 5 seconds at 50 duty cycle subject to the current limit not being exceeded and subject to the overall average power drawn being less than the specified average power rating including any input derating due to temperature or line voltage The available peak power is a function of the output voltage and maximum current for each module Full peak power is only possible when the output voltage is adjusted to Vmax and the maximum current is drawn from the module Note that both average and peak power ratings are subject to the same temperature derating as the input module derate by 2 5 per C above 50 C but are not subject to any line derating Start up amp Shut Down 7 All outputs are designed to have a regulated monotonic start up with a rise time of approximately 3 ms as shown in the diagram right The power good signal stays low until the voltage exceeds the power good threshold 90 at e Volks Where multiple output modules are used the default start up scheme is ratio metric with all outputs starting at the same time as shown in the diagram right External control circuits may be used to implement tracking or sequenced start up if necessary m E The outputs are not designed to start into a pre biased load and may discharge any externally capacitance before beginning to ramp the output voltage up in the normal way At
44. t damaged power cables or accidental power cable removal is provided and prevents damage to the unit in each case An internal circuit measures the voltage between S to V and S to V when this voltage exceeds the thresholds specified in the datasheet the output voltage is reduced to benign levels During system design care must be taken to ensure power cables have a sufficiently low voltage drop at maximum load current to ensure this protection does not activate unintentionally In systems where remote sensing is not used the output voltage at the power terminals will be slightly higher than that at the sense terminals This voltage difference is termed open sense offset and occurs due to internal bias currents in the sensing circuit Factory set units are set with the sense cables connected unless otherwise specified Local Bias Supply A local non isolated 5 V bias supply is provided on each output module 5 V on J5 6 referenced to COM on J5 5 This supply is intended to power interface circuits for monitoring and controlling the output modules such as amplifying the current output signal as described earlier The output can supply up to 10mA maximum and exceeding this can damage the unit Also as COM is connected to an internal voltage that is NOT equivalent to S or V particular attention must be given to grounding issues when interfacing COM to any control circuit in the application Connecting COM to S or V may result in damage to
45. that surfaces of the power supply may be hot and should not be touched when the product is operating FUSING The power supply has internal single pole fusing in the L Live line SERVICING The power supply contains no user serviceable parts Repairs must be carried out by authorised personnel only Contact Vox Power for further information APPROVAL LIMITATIONS NORTH AMERICA When this product is used with 180VAC 253VAC mains where no neutral is present connect the two live wires to L Live and N Neutral on the input connector COOLING For proper cooling of the power supply the air intake and outlet must not be impeded Allow 50mm clearance at both ends and position cabling appropriately EARTH TERMINAL MARKING To comply with the requirements of UL60950 1 EN60950 1 IEC60950 1 CSA22 2 no 60950 1 UL60601 1 EN60601 1 EN61010 1 IEC60601 1 IEC61010 1 CSA22 2 no 601 1 where the incoming wiring earth is intended for connection as the main protective earth conductor and where the terminals for such a connection is not supplied on a component or subassembly the user shall add an appropriate label displaying a protective earth symbol in accordance with 60417 2 IEC 5019 directly adjacent to the terminal The label should be durable and legible and should withstand the 15s rub test as per UL60950 1 section 1 7 15 WARRANTY Contact your sales agent or Vox Power for product repairs See Vox Power standard terms and conditions for warra
46. the unit Series Connected Modules NEVO output modules of the same type can be series connected to achieve higher output voltages The following instructions must be followed for output modules configured in this manner WARNING Energy and Voltage hazards may arise when individual modules are series connected See the Safety section for more details Isolation to Ground Care must be taken not to exceed the output module isolation to chassis ground when series connecting modules Each output module is rated for 250 volts maximum between each output terminal and chassis ground Exceeding this voltage may damage the module Remote Sensing For series connected modules remote sensing is achieved by connecting the upper most positive sense terminal S and the lower most negative sense terminal S from the series of modules to their respective load regulation points All inner sense terminals in the series must be daisy chained i e S to S from the first module in the series to the last module in the series An example of two series connected modules is shown below Twisted sense cables Series Connected Remote Voltage Current Control Remote voltage and or current control is possible with series connected modules using the advanced V control and I control functions described earlier However individual control of each module can be complex as the various control terminals are referenced to the positive output of the preced
47. tput voltage falls below the power good threshold A shutdown through the SD pin on J6 or any of the following abnormal conditions may cause the entire unit to latch off without the minimum 5mS ACOK warning e Over temperature of any part of the unit e Over voltage on the output e Internal over current device failure Power Good Signals PG1 PG4 amp PG5 PG8 Output Each output module provides a power good PG signal to 10V indicate when the output voltage is above approximately 90 of the pre set voltage for that module Each PG signal on an output module is internally connected through an opto isolator to the group signals circuit which buffers the signal through a 5V 11 PG1 1 PNP transistor with a 10k pull down resistor as shown PG2 3 PG3 5 The LED on the front of each module gives a visual PGA 7 confirmation of the PG status ACOK 10 Note that remote adjustments of the output voltage using the i Vcontrol and Icontrol pins do not change the PG signal opamp threshold The PG threshold is always approximately 90 of the voltage set with the manual potentiometer ov COM 12 Outputs Output Inhibits I NH1 I NH4 amp I NH5 I NH8 GINH1 amp GINH2 I nput The signals circuit provides an inhibit input to disable each output module individually and global inhibit inputs GINH1 amp GINH2 to inhibit each group of modules simultaneously Each inhibit input is internally connected through an opto i
48. ust be taken to avoid differential voltages between the negative power output terminals of the paralleled modules as this can cause errors at the control pins To avoid this it is recommended that a low impedance connection be made between the negative power terminals close to the PSU output and cables then connected from this common point to the load Audible Noise The following series of plots characterise the audible noise from the NEVO 1200 power supply over various conditions These plots can be used to estimate the actual audible noise for any application Noise vs Output power 1207 AC load 25 C 11040 nad 50 C LEV AC load 25 C P OW AT howd 50 C ii oi 400 thi 200 1000 1200 Output Powar A Noise vs Input voltage 25 C 42 ima Line 25 C ji Pm Lie 29 0 j Fma Line PR 07 Primas Line 25 C 10 el Lal a a RS 10 12 145 16 105 aos 115 45 Input Voltage irma Noise vs Input voltage 50 C 8 10 115 145 16 105 20 EES 145 Input Voltage Vinma Maiss 434 6 ss 47 5 515 47 5 4 45 425 7 40 Noise vs Ambient temperature 120VAC Pma LV AC Temp 0 7 Pma 1200 AL Temp 0 4 Pia 120VAC Temp i 10 14 34 5 10 Ambient Temperature 9 Noise vs Ambient temperature 220VAC mar VAL Temp TS Pma LA Temp j i Pi L OVAL Temp 3 10 14 36 5 30 Ambient Temperature C 15 15
49. ut Module FeatureS ssssssrsasnnrssnnnrsnnnrrsaannnsnnnnrosnnnrnsannnnnnnnnnnnn 16 Seres cd DUES ri 19 Paralleled OUTPUTS 2 20 AUGIDIC NOISE in cis A A A O AAA RES 24 Mechanical Dimensions and MOUNTING 26 CONNECT A ic oa se tae 27 CONTIGUEING YoUr NEVO en ies woul ea A a 28 A E E E E E E ea T E E A E TEE E 35 EMECOMP LANCES a a a a a eee 36 E eta EEEE A E EAEE EE EAE IEE EE A AAAA 37 Part Numbers andOrdering Information INPUT MODULES Input Module Details ss Nevo 12005 1200 Watt Input Module with ITE Approvals EN60950 Edition 2 Nevo 1200M 1200 Watt Input Module with Medical Approvals EN60601 Edition 3 OUTPUT MODULES Module Nominalvoltage Ratedcurent RatedPower Adjustmentrange Load regulation Line regulation OVP PART NUMBERING SYSTEM NEVO Input Module NEVO 1200 S E 1 1 2 2 3 3 4 4 Factory Configuration Number Product Type USE 0 for unused slots Blanking plates Standard will be inserted at factory Slot A Output Slot H Output Slot B Output Slot G Output Slot C Output Slot F Output Slot D Output Slot E Output ContactVox Power for special configuration requirements The factory will allocate a 3 digit suffix to identify any such requirement Installation Notes This Nevo 1200 series of configurable power supplies are intended for use within end customer applications which restrict access to un authorized personnel The instru

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