
Vertiv
™
|
Liebert
®
NXL
™
Power-Tie Controls
| Rev. 6 | 06/2017
5
2.1.1
Programmable Relay Board
The Programmable Relay Board (PRB) provides a means to trigger an external device when an event occurs in
the Liebert NXL. Each PRB has eight channels. Each channel has Form-C dry contacts rated at 1A @ 30VDC or
125VAC @ 0.45A.
Any alarm/event can be programmed to any channel or channels. Up to four (4) events can be programmed to a
relay. If multiple events are grouped to one relay, any of the events becoming active will activate the channel. The
same alarm/event can be programmed to more than one channel. Up to two Programmable Relay Boards can be
installed in the Liebert NXL for a total of 16 channels. Programming is performed through the HMI touchscreen
display.
Figure 4
Control wiring, Programmable Relay Board
NOTE
Up to two PRB’s can be installed in a Liebert NXL.
Table 1
Programmable Relay Board pinout
Terminal
Block
Channel
Pin No.
Common
Normally
Closed
Normally
Open
J71
CH1
1-3
1
2
3
CH2
4-6
4
5
6
CH3
7-9
7
8
9
CH4
10-12
10
11
12
J72
CH5
1-3
1
2
3
CH6
4-6
4
5
6
CH7
7-9
7
8
9
CH8
10-12
10
11
12
P99
J71
J72
P66
1 2 3 4 5
7
6
8 9 10 11 12
1 2 3 4 5
7
6
8 9 10 11 12
Содержание Liebert NXL
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