User`s manual

MILPOWER SOURCE 110BA1UM, REV(B)

8.1.2 Option 1 Dry Contacts Interface

Table 2 shows J3 pin assignment for Option 1. In this option the server interfaces to the UPS via a

quasi - RS232 communication link

Table 2 Dry Contacts Connector J3 Pin Assignment, Option 1

PIN DESCRIPTION NOTES

1 Remote Shutdown Return (1)

2 Mains Fail Relay, normally closed (2)

3 Mains Fail Relay, normally open (2)

4 Low Bat Relay, normally open (3)

5 Low Bat Relay, normally closed (3)

6 Remote Shutdown (1)

7 Mains Fail Relay, center pole (2)

8 Low Bat Relay, center pole (3)

9N.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.

6 REMOTE S.D. (+)

7 MAINS FAIL CTR

3 MAINS FAIL N.O.

2 MAINS FAIL N.C.

1 RTN RMT S.D.

8 LOW BAT CTR

4 LOW BAT N.O.

5 LOW BAT N.C.

Figure 8 - Dry Contacts - Option 1

3 REMOTE S.D (+)

7 BAT V LOW

9 BAT OPER

8 UPS ON

5 SYSTEM GND

4 NOT BAT OPER

1 FLT DET HI

2 FLT DET LO

Figure 7 - Dry Contacts - Option 0