Cisco Systems IE 3000 Series, IEM30004PC - page 113

B-23
Cisco IE 3000 Switch Hardware Installation Guide
OL-13017-01
Appendix B Installation In a Hazardous Environment
Verifying Switch Operation
Figure B-16 shows the completed DC-input wiring on a power and relay connector f or a primary power
source and an optional secondary power source.
Figure B-16 Completed DC Power Connections on the Power and Relay Connector
If your power source is –48 VDC, this table descibes the your wiring connections for Figure B-16.
Step 8 (Optional) If you plan to connect external alarm devices to the alarm relays and the switch is already
installed, go to the “Wiring the External Alarms” section on page B-38. Otherwise, go to the “Verifying
Switch Operation” section on page B-14.
1Power source A positive connection 5Power source B positive connection
2Power source A return connection 6Power source B return connection
3External device 1, relay wire connection 7External device 2, relay wire connection
4External device 1, relay wire connection 8External device 2, relay wire connection
201818
RT A
VA
RT A
VA
1
2
3
4
5
6
7
8
1Power source A return connection 5Power source B return connection
2Power source A –48 VDC connection 6Power source B –48 VDC connection
3External device 1, relay wire connection 7External device 2, relay wire connection
4External device 1, relay wire connection 8External device 2, relay wire connection