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Transition Networks SISTP10xx-141-LR(T) Industrial PoE Switch
24-Hour Technical Support: 1-800-260-1312 International: 00-1-952-941-7600
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Connecting an alarm fixture, continued
Fault indications
Wire the relay contacts to any warning light or audible alarm in the control room as shown in
Figure 13. When a fault occurs, the relay contacts open, stopping the flow of current through
the contact circuit. This will disable the external alarm or turn OFF a light, indicating a fault.
An alarm will occur under the following conditions:
• Power failure to either of the Industrial PoE Switch power inputs:
o Power wires are disconnected, power source malfunction
o Input power is something other than 48VDC
Figure 13: Alarm Relay Contacts