4.2.5 REPO Port
The UPS has an EPO function that operates by an EPO button on the operator control and display panel of the UPS or by a
remote contact provided by the user. The EPO button has a protective cover.
J5 is the REPO port. The port is shown in Figure 4.8 below and described in Table 4.8 below.
Figure 4.8 REPO port J5
Pin N am e M eanings
1 EPO-NC EPO activated when opened to Pin 2
2 + 12V EPO activated when opened to Pin 1
3 + 12V EPO activated when shorted to Pin 4
4 EPO-NO EPO activated when shorted to Pin 3
Table 4 .8 Description of R E P O port J5
EPO is triggered when pins 3 and 4 of J3 are shorted or pins 2 and 1 of J5 are opened.
If an external EPO facility is required, pins 1 and 2 or 3 and 4 of J5 are reserved for this function. The external EPO facility is
also connected to the normally open or normally closed remote EPO switch between these two terminals using shielded cable.
If this function is not required, pins 3 and 4 of J5 must be opened and pins 1 and 2 of J3 must be shorted.
N O T E: T he U PS EPO action shuts dow n the rectifier, in verter and static by p ass, but it does not
internally disconnect the m ains input pow er. To disconnect all p ower to the UPS, open the external
pow er sw itch, b ypass input switch, output switch and BC B after EPO is activated.
N O T E: S hielded twisted pair cables are used for REPO cables.
4 Electrical Installation
53
Vertiv™ Liebert® EXM2 UPS User Manual
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