Wiring The External Alarm Device Relays - Cisco Catalyst 2955 Hardware Installation Manual
Cisco systems switch installation guide
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Wiring the External Alarm Device Relays
Wiring the External Alarm Device Relays
Note
Note
Step 1
Step 2
Step 3
Catalyst 2955 Hardware Installation Guide
3-48
The alarm relays on the Catalyst 2955 switch are normally open (NO). To connect
an external alarm device to the relays, you must connect two relay contact wires
to complete an electrical circuit. Because each external alarm device requires two
connections to a relay, the Catalyst 2955 switch supports a maximum of two
external alarm devices.
For wire connections to the power and relay connector, you must use UL and CSA
rated, style 1007 or 1569 twisted-pair copper appliance wiring material (AWM)
wire (such as Belden part number 9318).
You must also use the ferrite that ships with the switch.
After you have completed the wiring for the power connections, follow these steps
to wire the switch to an external alarm device:
This procedure is optional.
Measure two strands of twisted-pair wire (18 to 20 AWG) long enough to connect
to the external alarm device.
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 power and relay connector after installation.
Insert the exposed wires for the external alarm device into the two connections
labeled A1, as shown in
Figure
3-23.
Chapter 3
Installation
78-14944-03
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