Cisco IE 3000 Series Hardware Installation Manual page 113

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