Cisco Systems IEM30004PC Instalační manuál stáhnout pdf (Strana 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.

1 Power source A positive connection 5 Power source B positive connection

2 Power source A return connection 6 Power source B return connection

3 External device 1, relay wire major alarm

connection

7 External device 2, relay wire minor alarm

connection

4 External device 1, relay wire major alarm

connection

8 External device 2, relay wire minor alarm

connection

201820

1 Power source A return connection 5 Power source B return connection

2 Power source A –48 VDC connection 6 Power source B –48 VDC connection

3 External device 1, relay wire major alarm

connection

7 External device 2, relay wire minor alarm

connection

4 External device 1, relay wire major alarm

connection

8 External device 2, relay wire minor alarm

connection

1 2 ... 125 126 127 128 129 130 131 132 133 134 135 ... 169 170

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Cisco Systems IEM30004PC Instalační manuál Strana 130