3.6.3 Connecting a Remote Emergency Power Off (REPO) switch
The UPS includes a REPO connection in the dry contact port. See the appropriate figure for your model in
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 battery charging and output power. When the emergency condition is resolved, the UPS will
not return to normal operation until the reset is done using REPO switch and then manually power on the UPS.
To make the cable for the REPO connection:
Figure 3.6 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 wire.
2.
Insert the stripped end into the plug terminals 1 and 2 respectively, then screw 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.
Connect one end of the cable to the remote switch, see Figure 3.6 below.
3.
Remove the factory installed jumper from Pins 7 and 8 of the dry contact port on the UPS
4. Connect the plug to Pins 7 and 8.
Figure 3.6 Cable/Plug for Connecting REPO switch to UPS REPO port
Item
Description
1
Terminal 1
2
Terminal 2
4
Plug (connects to REPO port on UPS)
4
REPO switch
3 Installation
20
Proprietary and Confidential ©2022 Vertiv Group Corp.
Vertiv™ Liebert® GXT5 Lithium-Ion UPS Installer/User Guide
