58
Alarm signals are connected to the switch through the six-pin alarm connector. Three connections are dedicated to the
two alarm input circuits: alarm input 1, alarm input 2, and a reference ground. An alarm input and the reference ground
wiring connection are required to complete a single alarm input circuit. The three remaining connections are for the alarm
output circuit: a normally open output, a normally closed output, and a common signal. An alarm output and the common
wiring connection are required to complete a single alarm output circuit.
The labels for the alarm connector are on the switch panel and are displayed in
Warning:
Explosion Hazard—Do not connect or disconnect wiring while the field-side power is on; an electrical arc
can occur. This could cause an explosion in hazardous location installations. Be sure that power is removed or that
the area is nonhazardous before proceeding.
Statement 1081
Caution:
The input voltage source of the alarm output relay circuit must be an isolated source and limited to less than or
equal to 24 VDC, 1.0 A or 48 VDC, 0.5 A.
Note:
Wire connections to the power and alarm connectors must be UL- and CSA-rated, style 1007 or 1569 twisted-pair
copper appliance wiring material (AWM) wire (such as Belden part number 9318).
To wire the switch to an external alarm device, follow these steps:
1.
Remove the captive screws that hold the alarm connector on the switch, and remove the connector from the switch
chassis.
Table 13
Alarm Connector Labels (Top to Bottom)
Label
Connection
NO
Alarm Output Normally Open (NO) connection
COM
Alarm Output Common connection
NC
Alarm Output Normally Closed (NC) connection
IN2
Alarm Input 2
REF
Alarm Input Reference Ground connection
IN1
Alarm Input 1
