M120BA-1A User Manual (in PDF format)
Contents
1. u J T 9 6 2 Visual Indicators erinnern 9 6 2 1 Normal Operation 9 6 2 2 Standby Mod T uu NS a E a au as 9 6 2 3 SS cca te aaa aa Su sS 10 6 2 4 Overload Condition J u u u u u u 10 6 2 5 Over Temperature Condition u u u u u 10 6 3 Battery 1 uay 11 7 Taking Care of the Battery u u 11 7 1 Battery Service Life 11 7 2 Replacing the Battery Pack 12 8 Communications and Remote Control 13 8 1 Dry Contacts Interface 13 8 1 1 Option 0 Standard Dry Contacts Interface 13 8 1 2 Option 1 Dry Contacts Interface l u u T 14 8 2 RS 232 Communication Interface 15 9 Eres EE 16 List of Figures Page Fig 1 Block Diagram2. 1 Internally shorted to J3 pin 5 not used by RS232 link 2 input RXD ReceiveData 3 Output TXD TransmitData_ 4 Output 018 Data Terminal Ready o5 SG X SignalGrond 6 input DSR fDataSetReady 7 Output RTS_ RequestTo Send 8 input CTS ClearToSend 9 Internally shorted to J3 pin 9 not used by RS232 link 15 MILPOWER SOURCE 120BA1UM REV A 9 Specifications OUTPUT BATTERY Voltage Frequency Power Factor Spikes Isolation Current waveform Line impedance Voltage Rating Frequency Waveform Type Capacity Charger Protection Monitor 84 165V AC or 180 260V AC selectable without switching to battery power below this level the battery will be used 48 64 Hz gt 98 200 joules clamping device Input output and chassis galvanically isolated gt 1 MQ at 600VDC Total capacitance between input and chassis is less than 0 02uf per line Leakage current is less than 2ma 130dB Input Isolation Transformer Sinusoidal with harmonic content of less than 2 5 for harmonics between 2fo to 32fo and less than 10096 N for harmonics between N 32 and 20kHz MIL STD 1399 section 300A Up to 5 ohms between 100Hz 200kHz 1 A W MIL STD 1399 section 300A 115Vac 3 2000 1500W 60Hz 0 2 digitally synthesized from a crystal oscillator Sinusoidal THD lt 2 linear
3. Output ON OFF Switch INPUT OUTPUT ON BATT LOW BATT OVERLOAD OVERTEMP Figure 4 Front Panel Main Components 4 2 MILPOWER SOURCE 120BA1UM REV A Front Panel Indicators and Switches See Figure 5 Input Fail LED red Input OK LED green Output Standby LED yellow Output OK LED green Output Fail LED red On Battery Warning LED blinking yellow Alarm Off Push button Low Battery Warning LED blinking yellow Overload Shutdown LED red Overtemperature Warning LED blinking yellow Overtemperature Shutdown LED red Load Level Bar Graph marked in 100 1500W Battery Charge Bar Graph marked in 100 15 minutes at 1500W load Set Battery Charge to 100 Push button for maintenance only Battery Test Passed LED green Battery Test Push button Battery Test Failed LED red FAIL STB 17 Z 140 INPUT OUTPUT 30 FAIL LOAD p c 10 LEVEL epum ALARM T 11 18 100 LOW BATT CEN gt 50 OVERLOAD ko 13 10 O WARNING 14 CHARGE OVERTEMP suUmoww __ sssi N 7 16 PASSER BATT TEST Q FAILED N PM PP Cas 19 20 21 22 Figure 5 Front Panel Indicators and Switches MILPOWER SOURCE 120BA1UM REV A 5 Rear Panel Description See Figure 6 23 Cooling Fan Air Outlet 24 J1 Power Connector see Fi
4. 2 Fig 2 Electrical Connections with Bypass 4 Fig 3 Electrical Connections without Bypass 5 Fig 4 Front Panel Main Components J 6 Fig 5 Front Panel Indicators 1 7 Fig 6 8 Fig 7 Contacts Option 0 14 Fig 8 Dry Contacts Option Deis A rennen traen en Pee esa 14 Fig 9 Outline Dimensions 18 List of Tables Page Table 1 Dry Contacts Connector J3 Pin Assignment Option 0 13 Table 2 Dry Contacts Connector J3 Pin Assignment Option 1 14 Table 3 RS232 Connector J4 Pin Assignment 15 120BA1UM REV A MILPOWER SOURCE 120BA1UM REV A IMPORTANT SAFETY INSTRUCTIONS The M120BA 1A contains an internal high voltage high energy power source 144VDC battery and large high voltage 340VDC capacitors The unit should not be tampered with by unauthorized personnel Turning off the Input ON OFF Switch and or disconnecting the input connector do not turn off the UPS The Power Co
5. a bad battery or the green Battery Test Passed LED 20 will turn on for about 20 seconds indicating that battery successfully passed the test The Battery Test may be repeated only after at least 20 seconds have elapsed since the last test 7 Taking Care of the Battery 7 1 Battery Service Life The gel lead acid sealed and maintenance free battery used in the M120BA 1A is of the highest quality Nevertheless it is a Limited Life Item and its life expectancy depends upon its operating and storage conditions The three most important factors that determine the life of the battery are Temperature Storage Conditions Charge Discharge Cycles Temperature The battery used in the M120BA 1A is sealed and does not dry up or lose gasses but its end of service life is brought about by the gradual corrosion of the electrodes This process is accelerated by high operating temperatures Every 10 C rise above 20 C will reduce the battery service life by half Storage Conditions When lead acid batteries are stored for extended periods of time lead sulfate is formed on the negative plates and insulates them The sulfating rate depends on the ambient temperature and the charge level of the battery High temperature and low charge level accelerate the sulfating and reduce the battery life In order to protect your battery from damage during storage e Make sure the battery is fully charged periodically every 3 months if the tempera
6. 9 are on The Load Level Bar Graph 17 indicates the loading percentage of the UPS 100 load is equal to 1500W of output power The lower six positions of the Load Level Bar Graph 15 to 75 are green The next three positions 80 110 120 are orange and the two uppermost positions 130 and 140 are red The colors do not have any special significance and are only intended to assist fast scanning of the load level The Battery Charge Bar Graph 18 indicates the percentage charge level of the battery 100 signifies that at least 15 minutes of full load will be supported by the battery 50 signifies 7 5 minutes at full load and so on Lower loads result in longer expected battery operation time When the battery is being charged the uppermost active segment of the Battery Charge Bar Graph blinks to indicate that charging is on 6 2 2 Standby Mode When the Input ON OFF switch is ON but the Output ON OFF switch is OFF the UPS is in the Standby Mode This is indicated by the yellow Output Standby LED 8 being on In this Mode the DC AC inverter is OFF and the output contactor is open but all other function of the UPS are active including battery charging and RS 232 communication port MILPOWER SOURCE 120BA1UM REV A 6 2 3 Input AC Failure When the input AC voltage is below the minimum required for proper operation the UPS runs on battery power During this condition the red Input Fail LED 6 is on the yellow On Battery Warn
7. MILPOWER SOURCE UNINTERRUPTIBLE POWER SYSTEM SINGLE PHASE 2kVA M120BA 1A MADE IN THE U S A USER S MANUAL East Coast Milpower Source Inc Belknap Industrial Park Rt 106 Belmont NH 03220 Phone 603 267 8865 Fax 603 267 7258 West Coast Hytech Associates 1498 Linda Vista Ave Pasadena CA 91103 Phone 818 304 9620 Fax 818 304 9620 November 2003 Publication Number 120BA1UM REV A MILPOWER SOURCE Table of Contents Page Safety iii 1 General Desctiption iieri 1 1 1 Intended 1 1 2 Functional Overview 1 2 Setting the Input Voltage Range 3 3 Installation Instructions U U u uu 3 4 Front Panel Description 6 4 1 Front Panel Main Components u u 6 4 2 Front Panel Indicators and Switches 7 5 Rear Panel Description 8 6 Operation Controls and Indicators 9 6 1 Turning the UPS and OFF
8. R VARISTOR EXTERNAL POWER CONDITIONER J2 UPS AC DC DC AC OUTPUT CONVERTER INVERTER gt J2 INPUT OUTPUT OFF OFF RS232 BATTERY CONTROL SJ CHARGER CIRCUIT DRY CONTACTS Figure 1 M120BA 1A Block Diagram MILPOWER SOURCE 120BA1UM REV A 2 Setting the Input Voltage Range Note The input voltage range is set prior to shipping to 115VAC To change the input voltage range a Turn off both Input and output ON OFF switches b Disconnect connectors J1 and J2 from the rear panel c Open the Input Voltage Setting access cover 2 screws d Pull out the exposed connector handle upward e Reconnect the connector in the desired location the window should line up with the desired voltage marking f Close the access cover tighten the two screws g Verify that the desired AC input voltage matches the voltage seen through the window 3 Installation Instructions Before installing the unit please read carefully the Safety Instructions at the beginning of this manual Make sure that the input voltage setting is correct Two circular connectors J1 and J2 are provided on the rear panel of the UPS see Figure 6 J1 is the input connector to the Power Conditioner section of the unit J2 carries the output of the Power Conditioner and both input and output of the UPS section Please refer to Fig 1 for the definitions of the Power Conditioner and the UPS sections Use Figure 2 if it i
9. attery Pack by the two edges on the sides Caution Two man lift and lift it straight up To install a new battery a b c d e Lower the Battery Pack straight into its place at the right side of the UPS Verify that the battery mating connector and harness near the front panel are not damaged by the battery Turn the screws on the top and the right side without tightening them yet After all screws are in torque them at 6 5 IN LB Note Suitable locking compound Locktite 242 or similar should be applied to all screws Connect the battery connector Close the battery connector cover and tighten its screws Reconnect J1 and J2 to the rear panel The unit is now ready for operation Note If the new battery is fully charged press the Set Battery Charge to 10096 Push Button for ten seconds to set the charge level to full scale 12 MILPOWER SOURCE 120BA1UM REV A 8 Communications and Remote Control 8 1 Dry Contacts Interface Dry Contacts Interface is available through connector J3 a DB9 male connector located on the rear panel This interface allows control and monitoring of the UPS by a server Two configurations are available Option 0 Standard and Option 1 8 1 1 Option 0 Standard Dry Contacts Interface Table 1 shows J3 pin assignment for Standard configuration Option 0 Table 1 Dry Contacts Connector J3 Pin Assignment Standard configuration Option 0 DESCRIPTION 5 Fa
10. ediately or after a short delay depending on the duration the unit was off During this delay the yellow Output Standby LED 8 blinks 6 2 5 Over Temperature Condition When the internal temperature of the UPS exceeds a preset level the yellow Over Temperature Warning LED 15 blinks and audible alarm sounds at one second intervals 50 duty cycle Three minutes after the Over Temperature Warning LED starts to blink and if the temperature does not drop the UPS shuts itself off This condition is indicated by the red Over Temperature Shutdown LED 16 and the red Output Fail Led 10 Recovery from Over Temperature Shutdown is automatic when the temperature drops Check condition of the Air Filter on the front panel If it is dirty clean it and re install into the unit 10 MILPOWER SOURCE 120BA1UM REV A 6 3 Battery Test Battery Test may be invoked only if the UPS runs on AC input power the Battery Charge level is above 85 the load is above 35 and the battery is not engaged in supporting Input Power Limit If Battery Test is denied due to low charge level the Charge Level Bar Graph blinks once when the Battery Test Push button is pressed To test the battery press momentarily on the Battery Test Push button 21 The green Battery Test Passed LED 20 will blink for about 3 seconds indicating that Battery Test is running After about 3 seconds either the red Battery Test Failed LED 22 will turn on and latch indicating
11. er with RFI filters and spike absorbers Both the input and output of the Power Conditioner are available to the user via the external connectors of the unit This configuration allows the user to externally bypass the UPS section of the UPS section of the M120BA 1A without loosing the surge protection and noise filtering provided by the Power Conditioner This capability is extremely important in shipboard applications since most standard commercial equipment is designed to operate safely from grounded AC lines whereas in standard shipboard electrical systems both lines are HOT and none may be grounded The power conditioner allows the safe connection of commercial equipment to standard shipboard electrical systems without creating a safety hazard See Section 3 for detailed connection diagram The UPS is composed of a high power factor AC DC Input Section Converter Removable Battery Pack a Battery Charger a DC AC Inverter and a microcontroller based Control Circuit The AC DC Input Section Converter is a high frequency switching converter that provides 320VDC to the DC AC inverter The AC DC converter draws clean sine input current waveform and does not induce electrical noise into the input lines The Removable Battery Pack contains the energy source used by the UPS to provide power during AC input failures The Battery Pack includes a dozen 12V 7AH lead acid sealed maintenance free type cells It provides 15 minutes of full rate output powe
12. gure 2 for pin out 25 J2 Power Connector see Figure 2 for pin out 26 GND Connection 27 Dry Contacts Connector J3 see paragraph 8 for pin out description 28 RS232 Connector J4 see paragraph 8 for pin out description 29 Optional Bushing 2 places Figure 6 Rear Panel MILPOWER SOURCE 120BA1UM REV A 6 Operation Controls and Indicators ref Figures 4 and 5 6 1 Turning the UPS ON and OFF In order to turn the UPS ON after an electrical connection is made first turn ON the Input ON OFF switch 4 and then the Output ON OFF switch 5 When the Output ON OFF switch 5 is turned off the internal output contractor opens and disconnects the load from the UPS output All of the UPS functions except for the output voltage remain active Standby Mode When the UPS operates turning off the Input ON OFF switch 4 disconnects the UPS from the AC input and the UPS then runs on battery power only To turn the UPS off both Input and Output ON OFF switches must be in the OFF position Note The UPS will not start on battery power to avoid battery discharge during shipping and storage Hence the Input ON OFF switch must be ON and AC voltage must be present at the input in order to start the UPS 6 2 Visual Indicators 6 2 4 Normal Operation When the UPS is running on AC input power and both Output and Input switches are ON the two bar graphs 17 18 the green Input OK LED 7 and the green Output OK LED
13. ing LED 11 blinks and five seconds after input power loss an audible alarm starts beeping once every five seconds To turn off the audible alarm press momentarily on the Alarm OFF Push button 12 When the button is pressed a short beep will sound to indicate compliance During battery operations the Battery Charge Bar Graph 18 continuously displays the battery charge level When the charge in the battery drops below 35 the yellow Low Battery Warning LED 13 starts blinking indicating that less than 5 minutes of full load may be supported by the battery and the audible alarm emits two short beeps once every five seconds When the Battery Charge Bar Graph reaches 0 no segments are lit the UPS will continue to operate until the actual voltage of the battery trips the battery protection circuit and shuts down the UPS When the input AC voltage recovers the UPS will turn on automatically 6 2 4 Overload Condition If the load exceeds the rating of the UPS or there is a short circuit on the UPS s output the protection circuit of the UPS will shut down the UPS output after a short delay depending on the depth of the overload This condition is indicated by the red Output Fail LED 10 and the red Overload Shutdown LED 14 To recover from overload shutdown Turn off the Output ON OFF switch 5 Remove the overload or short circuit from the UPS output Turn on the Output ON OFF switch 5 The output may turn on imm
14. load lt 4 non linear Internal encapsulated sealed maintenance free lead acid Full rated power for at least 15 minutes Low ripple regulated voltage float charger with current limiting and temperature compensation Fully charges the battery within 5 hours Battery is protected from over discharge by internal protection circuit to avoid damage to battery in case of prolonged power outage Battery charge level and internal impedance are monitored by the UPS micro controller 16 MILPOWER SOURCE 120BA1UM REV A 9 Specifications continued ENVIRONMENT ACOUSTIC NOISE PHYSICAL Federal Military ESD Temperature Humidity Altitude Orientation Mechanical shock Vibration Dimensions Weight Meets the requirements of FCC Title 47 part 15 class A MIL STD 461D RE101 RE102 CE101 CE102 CS101 and RS103 All I O lines are protected from ESD Non operating 40 to 72 C Note High temperature for prolonged duration will shorten the battery life Operating 0 to 52 C Up to 95 Operating Up to 10 000 feet Non operating Air transport 40 000 feet May be installed at any orientation When packed withstands the free fall drop and edgewise drop IAW Methods 5007 1 and 5008 1 of Federal Test Method standard 101C When operating withstands the high impact shipboard shock IAW MIL S 901D grade A class Type B When operating withstands Type I vibrati
15. nditioner output is not switched off by the Input ON OFF Switch The unit should only be plugged into an approved double pole and fused 30A electrical outlet The fuses or circuit breaker rating should be at least 25 AMP but not more than 35AMP for 115VAC input for 230VAC input use 15 to 20 AMP fuses The Replaceable Battery Pack of the M120BA 1A MPS P N M350380 contains lead acid batteries The Battery Pack should not be opened since it can only be replaced with a new pack battery cells cannot be replaced individually Dispose the Battery Pack properly Careless disposal such as into a fire may cause an explosion Local regulations may require controlled disposal of lead acid batteries Please check your local regulations before disposal MILPOWER SOURCE 120BA1UM REV A 1 General Description 1 1 Intended Applications The M120BA 1A is a high quality rugged 2KVA 19 rack mounted Uninterruptible Power Source UPS In addition to full compliance with all the requirements of MIL STD 1399 Section 300 the M120BA 1A is specifically designed to meet the harsh military shipboard environment The high reliability and ruggedness of the M120BA 1A make it an excellent choice not only for military shipboard applications but for critical shore based applications as well 1 2 Functional Overview The M120BA 1A consists of two main sections Power Conditioner and UPS see Fig 1 The Power Conditioner is an isolation transform
16. on IAW MIL STD 167 1 The UPS will endure a sweep of 1 5g sinusoidal vibration from 5 to 50 Hz for a total duration of 2 hours and random vibration AW MIL STD 810D Cat 9 Proc I test condition I 3 2 11 Fig 514 3 34 Less than 48dBA 3U 19 rack 28 deep see Fig 7 180 Ib including Removable Battery Pack 17 MILPOWER SOURCE 120BA1UM REV A y FEMALE 26 1 EQ 4 PLACES 25 MAX AIR OUTLET BATTERY REMOVAL INSTRUCTIONS REMOVABLE BATTERY PACK 00 708 8 1 0 CAPTIVE SCREW 4 PL 10 32 UNF 10 i RADIAL FLOATATION OPTIONAL SLIDES UPS TOP VIEW Note Unless otherwise noted all dimensions are in mm Figure 9 Outline Dimensions 18 MILPOWER SOURCE 120BA1UM REV A UPS REAR PANEL SEE view D PAINTED GRAY COLOR NO 26307 AIR INLET PER FED STD 595 UPS FRONT PANEL Figure 9 Outline Dimensions cont 19 MILPOWER SOURCE 120BA1UM REV A SEE vey C 4 5 gT x 8 16 cg UPS SIDE VIEW 47 s L C SECTION SECTION EMI GASKET EMI GASKET LEADER TECH x P N 11 32AH 5A 17 76 VIEW D VIEW C Figure 9 Outline Dimensions cont 20
17. pole 9 N C Notes to Table 2 1 Connecting 5 to 12Vdc to pin 6 to pin 1 causes the UPS to shutdown if in Battery Mode latched 2 If AC input is good pin 7 is shorted to pin 2 and pin 3 is open If AC input is bad pin 7 is shorted to pin 3 and pin 2 is open 3 If battery voltage is good Pin 8 is shorted to pin 5 and pin 4 is open If battery voltage is bad Pin 8 is shorted to pin 4 and pin 5 is open Fig 8 shows the dry contacts interface circuits for Option 1 N 3 REMOTE S D 5 SYSTEM GND 7 BAT v LOW 8 UPS ON 9 BAT OPER 4 NOT BAT OPER 1 FLT DET HI 2 FLT DET LO Figure 7 Dry Contacts Option 0 14 REMOTE S D 4 1 IRTN RMT S D MAINS FAIL CTR MAINS FAIL N C MAINS FAIL N O LOW BAT CTR LOW BAT N C LOW BAT N O Figure 8 Dry Contacts Option 1 MILPOWER SOURCE 120BA1UM REV A 8 2 RS 232 Communication Interface The RS232 serial communication interface is available through connector J4 DB9 female connector located on the rear panel of the UPS This interface allows control and monitoring of the UPS by a host computer through the serial RS232 communication link For further information about this feature refer the M120BA 1 Software User Manual Table 3 shows the standard RS232 pin assignment Table 3 RS232 Connector J4 Pin Assignment Pin 0 Symbol Description j
18. r The Battery Pack is not a serviceable item It cannot be disassembled and can only be replaced as a single unit The Battery Charger is a high frequency voltage regulated and current limited DC to DC converter It is powered from the 320VDC output of the AC DC Input Converter and provides temperature compensated float charge to the Battery Pack The DC AC Inverter is high frequency inverter that generates clean sine shape 115VAC voltage from the 320VDC output of the AC to DC Input Section The DC AC Inverter is current limited and has an overload protection circuit that turns it off latched after a delay from the time the load exceeds 120 The delay depends upon the overload level The Control Circuit is a microcontroller based circuit that provides monitoring of the unit s status battery charge load level input and output levels etc and supports communications and front panel status indicators Note than when the UPS is bypassed an external circuit breaker or fuse must be used in order to protect the Power Conditioner from overload The circuit breaker may be on the input or output side of the Power Conditioner The Power Conditioner contains internal fuses on its input These internal fuses are intended only as a safety feature in case of an internal failure and should not be used as overload protection devices MILPOWER SOURCE 120BA1UM REV A AC INPUT RFI ISOLATION RFI x J1 FILTER amp FILTER amp VARISTOR XFM
19. s desired to use the power conditioner as a buffer between the mains and the load when the 120 is externally bypassed Use Figure 3 if bypass is not required After the unit is installed and ready to be turned ON see paragraph 6 1 Turning the UPS ON and OFF for operating instructions MILPOWER SOURCE 120BA1UM REV A PWR COND INPUT PHASE 2 115 J1 VIA TWO POLE PWR COND INPUT PHASE 1 B 30 AMP CIRCUIT BREAKER CHASSIS GND x UPS IN 2 PWR COND OUT 1 AC LOAD Q UPS OUT 2 BYPASS SELECTOR NOTE 2 CHASSIS GND REAR PANEL GND CONN NOTES 1 USE 8 WIRES 2 POSITIONS OF BYPASS SELECTOR UPPER POSITION UPS SAFETY GND LOWER POSITION BYPASS UPS M120BA 1A Figure 2 Electrical Connections with Bypass MILPOWER SOURCE 120BA1UM REV A PWR COND INPUT PHASE 2 C 115VAC J1 VIA TWO POLE PWR COND INPUT PHASE 1 B 30 AMP CIRCUIT BREAKER CHASSIS GND A UPS M120BA 1A UPS OUT 1 AC TO LOAD UPS OUT 2 CHASSIS GND REAR PANEL GND CONN SAFETY GND NOTES 1 USE 8 WIRES Figure 3 Electrical Connections without Bypass MILPOWER SOURCE 120BA1UM REV A 4 Front Panel Description 4 1 Front Panel Main Components See Figure 4 1 Removable air filter of the Power Conditioner s cooling air 2 Visual Indicators and Switches for detailed view see Figure 5 3 Air Inlet of main UPS heatsink 4 Input ON OFF Switch 5
20. ture is approximately 24 C and every month if the temperature is higher than 37 C by operating the UPS for at least six hours e Store the batteries in a cool place may be stored separately from the UPS e Never store a discharged battery 11 MILPOWER SOURCE 120BA1UM REV A Charge discharge Cycles The number of times and the depth of battery discharges during AC input failure affects the service life of the battery If the battery is allowed to discharge only to 50 of its charge the number of charge discharge cycles before it fails will be three times the number of cycles had it been allowed to reach 30 charge Battery life may be prolonged by limiting the operating time on battery power to the minimum required by the system to perform an orderly shutdown 7 2 Replacing the Battery Pack For ease of use the battery of the M120BA 1A is packaged within a Removable Battery Pack MPS P N M350380 that may be ordered separately During storage the Battery Pack may be removed and stored separately in a cooled ambient To remove the Battery Pack from the UPS a b 4 f Turn OFF the Input and Output ON OFF switches Disconnect J1 and J2 from the rear panel Open the Battery Connector access cover Remove screws Disconnect the connector by pulling upward Unscrew the battery s screws on the top and the right side of the UPS marked By a B on the top and recessed on the side Hold the B
21. ult Detect Signal Low Fault Detect Signal High 3 Remote Shutdown Not Battery Operation System Common Ground Battery Voltage Low nput Power Loss Battery operation 3 Notes to Table 1 1 Pin 1 is shorted to 2 when one of the following conditions occurs Over Temperature Condition Battery failure Charger Failure Internal UPS Controller Failure 2 Connecting 5 to 12Vdc to pin 3 to pin 5 causes the UPS to shutdown if in Battery Mode latched If in AC mode the UPS enters a Standby Mode Ac output is off all other functions are on 3 Ifthe UPS operates on battery power pin 9 is shorted to 5 and pin 4 is open Otherwise pin 4 is shorted to pin 5 and pin 9 is open 4 Ifbattery voltage is low pin 7 is shorted to pin 5 Otherwise pin 7 is open 5 If UPS output is pin 8 is shorted to pin 5 Otherwise pin 8 is open Figure 7 shows the dry contacts interface circuits for Option 0 13 MILPOWER SOURCE 8 1 2 Option 1 Dry Contacts Interface 120BA1UM REV A Table 2 shows J3 pin assignment for Option 1 In this option the server interfaces to the UPS viaa quasi RS232 communication link Table 2 Dry Contacts Connector J3 Pin Assignmen t Option 1 Mains Fail Relay normally closed 3 Mains Fail Relay normally open 4 Low Bat Relay normally open 5 Low Bat Relay normally closed 3 6 RemoteShutdown 8 LowBatRelay center
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