Figure 6.2 Parallel Cables Connection
6.3.5 REPO
In addition to the EPO terminal provided by each UPS module to control the EPO of each module respectively, the parallel
system also provides remote EPO function for controlling all UPS modules to shutdown simultaneously from a remote
terminal, as shown in Figure 6.3 below.
NOTE: The remote EPO switch must provide dry contact signal, which is normally open or normally closed.
NOTE: The external EPO device can be composed of another control system which can disconnect UPS mains supply
or bypass input.
Figure 6.3 EPO Circuit Diagram
NOTE: In Figure 6.3 above, the upper one is normally open type, and the lower one is normally closed type.
6 Parallel System and LBS System Proprietary and Confidential ©2023 Vertiv Group Corp. 49
Vertiv™ Liebert® EXS Installer/User Guide
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