Connecting The External Alarm Port - Alpha Technologies CFR 7.5K Operator's Manual

2 Installation

2.8 Connecting the External Alarm Port

An external alarm panel can be connected to the external alarm port (Figure 2.4). The port's
contacts are rated at 30 VDC at 1 Amp.
An Emergency Power Off (EPO) switch is created by wiring a switch to Pins 7 and 8.
• Pushing the EPO switch automatically switches off the unit's battery circuit breaker.
• The contacts must be shorted for at least 1.5 seconds with unit shutdown about 2 seconds
after the shorting starts.
• The switch must be a SPST, N.O. type and be electrically isolated (up to 1500 VAC
isolation is recommended). The connecting cable can be twisted or shielded wire not
more than 100 ft. (30 m) long.
CAUTION: The EPO switch does not disconnect the utility line. Switch off the circuit
breaker providing line power to the unit.
RJ-45
Connector
(8-Pin Type)
8 1
Figure 2.4
Wiring the External Alarm Port
24
N.O. Low
Battery Warning
N.C.
Battery OK
EPO
Circuit
8 7 6 5
N.O. EPO Switch
N.O. Line
Failure
N.C. Line
Present
UPS Internal
4 3 2 1
UPS External
Contact Rating:
30 VDC @ 1 Amp