Cascade the Auxiliary Device with Wire Pairs
1.After wires are run from auxiliary device (1) to terminal block position 9, run a second set of wires (2) from terminal block position 9 on the first EPO box to terminal block position 9 on the second EPO box.
2. Continue until all boxes are connected. (See the diagram in “Cascade Multiple EPO Boxes“ for reference.)
Direct Wiring Alternative
If the APC devices are centrally located between exit doors, it may be more practical to run separate wire pairs from the devices to each EPO box. This wiring method requires terminal block connections in every EPO box, rather than cascading cables between boxes. Connect wire pairs from the Normally Open (NO) contacts on the devices to each EPO box. Because this alternative results in multiple wire pairs at the terminals of the devices, APC does not recommend using it with more than three EPO boxes.
Verify Connections at each EPO Box
1.Verify that the wiring is correct before attaching critical load devices to your devices:
A. With the devices powered ON, use a small tool to press each check point, one at a time.
12 | Emergency Power Off System Installation and Operation |