2�6�3� Connecting A Remote Emergency Power-Off (Repo) Switch - Vertiv Liebert GXT5 Series Installer/User Manual

2.6.3. Connecting a Remote Emergency Power-off (REPO) Switch
The UPS includes an EPO connection in the dry-contact port� See the appropriate figure for your model in
Panels on page 4, for the location of the port�
UPS ships with a REPO jumper installed, allowing the UPS to operate as a normally-closed switch system (fail-safe)�
Opening the circuit disables the UPS� To connect a REPO switch that opens the circuit to shut down the rectifier
and inverter and power-off the UPS, use a cable from the remote switch to plug into the REPO-port on the UPS�
In normal conditions, the REPO switch cannot cut off the UPS input power� When the REPO switch trips, the UPS
generates an alarm and immediately cuts-off output power� When the emergency condition is resolved, the UPS
will not return to normal operation until you reset the REPO switch and manually power- on the UPS�
To make the cable for the REPO connection:
Figure 2-4 below, shows the cable required to make the connection� We recommend using 18 AWG to 22 AWG (0�82
mm 2 to 0�33 mm 2 ) copper-core cable�
1� Remove the insulation from the end of two cables�
2� Insert the stripped end into the plug terminals 1 and 2 respectively, then press down the terminals� Make sure
that the cables are secure in the plug to prevent failure because of loose contact�
To connect a UPS to the REPO switch.
CAUTION
To maintain safety (SELV) barriers and electromagnetic compatibility, signal cables should be shielded and run
separately from power cables.
1� Connect one end of the cable to the remote switch, see
2� Remove the factory-installed jumper from pins 7 and 8 of the dry-contact port on the UPS�
3� Connect the plug to pins 7 and 8�
Figure 2-4 Cable/Plug for Connecting REPO switch to UPS REPO port
ITEM DESCRIPTION
1 Terminal 1
2 Terminal 2
3 Plug (connects to REPO port on UPS)
4 REPO switch
18
Figure 2-4 below�
Rear
Installation