Cisco Systems IE 3000 Series, IEM30004PC - page 130

B-40
Cisco IE 3000 Switch Hardware Installation Guide
OL-13017-01
Appendix B Installation In a Hazardous Environment
Connecting Power and Alarm Circuits
Figure B-30 shows the completed wiring for two power supplies and two external alarm devices.
Figure B-30 Completed Connections for Two External Alarm Devices on the Power and Relay
Connector
If your power source is –48 VDC, this table descibes the wiring connections for Figure B-30.
See the “Attach the Power and Relay Connector to the Switch” section on page B-24 for instructions on
how to connect the power and relay connector to the front panel.
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 major alarm
connection
7External device 2, relay wire minor alarm
connection
4External device 1, relay wire major alarm
connection
8External device 2, relay wire minor alarm
connection
201820
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 major alarm
connection
7External device 2, relay wire minor alarm
connection
4External device 1, relay wire major alarm
connection
8External device 2, relay wire minor alarm
connection