Vertiv Liebert APM 300, Руководство пользователя

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54 Chapter 7 Parallel System And Dual Bus System
APM 300 Integrated UPS Single Module And Parallel System User Manual
UPS 1
J2
UPS 2
Parallel control cable
J3
J2
J3
Parallel control cable
UPS 1
J2
J3
UPS 2
J2
J3
Parallel control cable
Parallel control cable
Figure 7-2 Connection of parallel control cables of parallel system
J3
J4
J2
J2
J3
J4
Figure 7-3 Locations of ports J2, J3 and J4 on bypass module
7.2.6 Remote EPO
In addition to the EPO switch provided on the operator control and display panel of each UPS module for
controlling the EPO of each module respectively, the parallel system also provides remote EPO function for
controlling all UPS modules to shut down simultaneously from a remote terminal, as shown in Figure 7-4.
Note
1. The remote EPO switch must provide dry contact signal, which is normally open or closed.
2. The open circuit voltage provided is 5Vdc, <20mA.
3. The external EPO device can be composed of another control system which can disconnect the UPS mains supply or
the bypass input.
4. Pins 1 and 2 of the normally closed EPO-J10 port on the bypass module have been linked in factory.