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Relay Card
The relay card provides voltage-free contact closures for remote monitoring of alarm conditions.
Delivering On Battery, On Bypass, Low Battery, Summary Alarm, UPS Fault and On UPS sig-
nals, the easy-to-install card integrates with AS/400 computers (additional cable required) and other
relay contact monitoring systems.
The relay card is rated for 24 VAC/DC at 1A and supported in any of the three Liebert IntelliSlot bays
on the Liebert NX.
Table 22
Relay Card pin configuration
Pin
Function
1
UPS Fault
2-3
Not Used
4
UPS Fault
5
Summary Alarm**
6
Summary Alarm**
7
Any Mode Shutdown return
8
Not Used
9
Common - Low Battery
10
Low Battery
11
Low Battery
12-13
Not Used
14
UPS Any Mode Shutdown
15
On UPS
16
On Battery
Common - UPS Fault, Summary Alarm,
17
On UPS, On Battery, On Bypass
18
On Battery
19-23
Not Used
24
On Bypass
25
Not Used
**A Summary Alarm occurs when any of the following conditions exist:
1. Utility power is out of the acceptable range (voltage and/or frequency).
2. UPS is in BYPASS MODE (load not on Inverter power).
3. UPS Battery is LOW.
4. UPS fault has occurred.
Table 23
Relay card jumper configuration
Number
Connection
JP01
Pin 9 to Pin 17
ANY JP02
Pin 7 to Pin 17
Operation
Closed if no UPS failure
Closed if UPS fails
Closed if SUMMARY ALARM** occurs
Closed if no alarm conditions are present
Not supported – use External EPO terminal
Closed if battery is OK
Closed if LOW BATTERY point occurs
Not supported – use External EPO terminal
Closed if ON UPS (inverter) power
Closed if ON BATTERY power (Utility failure)
Closed if not ON Battery power (Utility OK)
Closed if ON BYPASS
Description
Allows all relay COMMONS to be tied together.
REMOVE - (Interconnects all relay COMMONS and the (not
supported) MODE SHUTDOWN Return
85
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