Connecting the external alarm port, 5 connecting the external alarm port, External alarm connector – Alpha Technologies CFR 3000, CFR 3000RM User Manual
Page 26: This rj–45 connector provides line, Failure and low battery warning informa, Tion and allows the connection of an, Emergency shutdown switch with form, C contacts (section 2.5), How to connect the external alarm port (section
2
Installation
20
2.5
Connecting the External Alarm Port
An external alarm panel can be connected to the external alarm port (Figure 2.7). 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. This fea-
ture must be ordered from the factory so the unit can be configured to operate with this switch.
•
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. long.
•
The contacts must be shorted for at least 1.5 seconds with unit shutdown about 2 seconds
after the shorting starts.
CAUTION: The EPO switch does not disconnect the utility line. Switch off the circuit
breaker providing line power to the unit.
Figure 2.7
Wiring the External Alarm Port
8
7
6
5
4
3
2
1
EPO
Circuit
Optional
N.O. EPO Switch
N.C. Line
Present
N.C.
Battery OK
N.O. Line
Failure
N.O. Low
Battery Warning
Contact Rating:
30 VDC @ 1 Amp
UPS Internal
UPS External
1
8
RJ-45
Connector
(8-Pin Type)