22
Switch Installation
Connecting Alarm Circuits
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. See Figure 11 on page 22.
Figure 11 Alarm Connector
2. Measure two strands of twisted-pair wire (16-to-18 AWG) long enough to connect to the external alarm device.
Choose between setting up an external alarm input or output circuit.
3. Use a wire stripper to remove the casing from both ends of each wire to 0.25 inch (6.3 mm) ± 0.02 inch (0.5 mm).
Do not strip more than 0.27 inch (6.8 mm) of insulation from the wires. Stripping more than the recommended
amount of wire can leave exposed wire from the alarm connector after installation.
Label Connection
-/- Alarm Output Normally Closed (NC) connection
COM Alarm Output Common connection
-||- Alarm Output Normally Open (NO) connection
To Next Page
Loading...
Need help?
General