Vertiv
™
|
Liebert
®
NX
™
225-600kVA Installation Manual | Rev. 8 | 07/2017
14
2.4.5
Customizable Output—TB2
This 16-pole screw connector allows the connection of six individual configurable output contacts. Each contact
is rated for 24VDC 1A. The maximum potential difference between the pins must not exceed 24VDC.
Use 16-22AWG cable. The selectable contacts can be customized (by qualified technicians only) to perform
various functions.
2.4.6
Customizable Input Contact—TB1
This 16-pole screw connector allows the connection of four individual configurable input contacts.
Each contact is rated for 24VDC 1A. The maximum potential difference between the pins must not exceed 24VDC.
Use 16-22AWG cable. All input contacts can be programmed using service software.
Table 2
Customizable output contacts
Pin
Signal
Explanation
1
Normally Closed
Alarm Summary
2
Normally Open
3
Normally Closed
Bypass Active
4
Normally Open
5
Normally Closed
Low Battery
6
Normally Open
7
Normally Closed
AC Fail
8
Normally Open
9
Common Pins 1-8
10
Not Available
11
Normally Closed
Selectable
12
Normally Open
13
Common Pins 11-12
14
Normally Closed
Selectable
15
Normally Open
16
Common Pins 14-15
Table 3
Customizable input contacts
Pin
Signal
Explanation
1
Input #1 (24VDC out)
Selectable
1
2
Input #1 (24VDC signal)
3
Input #2 (24VDC out)
Selectable
2
4
Input #2 (24VDC signal)
5
Input #3 (24VDC out)
Selectable
6
Input #3 (24VDC signal)
7
Input #4 (24VDC out)
Selectable
8
Input #4 (24VDC signal)
9-16
Common Pins 1-8
Not Available
1.
This contact is used for the MBB auxiliary contacts. See
Figure 5
.
2.
For 1+N systems, the auxiliary contacts for the MOB breaker must be connected to these inputs. See
Figure 5
. A shorting switch may be connected here for
Load Bank Breaker/Testing.
!
WARNING
To drive the inputs, use no-voltage contacts. Do not use voltages supplied by external power supply.
