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Connecting Alarms
Introduction
The SCC-LTM and SCC-RLTMs contain a terminal block that allows you to
connect up to three audible alarms and three visual alarms. These alarms alert you
to critical, major, and minor conditions. The top six screw terminals on the
terminal block are available for audible alarms, such as bells; the bottom six screw
terminals are available for visual alarms, such as lights.
During normal, uninterrupted operation, the contacts remain open. If a failure
occurs, the contacts close and trigger the connected alarm.
Alarm Categories
The following table lists the three general categories of alarms and the possible
causes.
Alarm
Critical (Crit)
Major (Maj)
Minor (Min)
296-1011-200 Rel. 5.0, Doc. Rev. 08.01
Warning: The contacts on the terminal block are rated at 30 VAC and
have a maximum current rating of 1 ampere (A). The circuit connecting
the alarms must meet the requirements for safety extra-low voltage
(SELV). The wires connecting the alarms must be the appropriate gauge
for alarm devices.
Possible Cause
Hardware failures, such as when the system power supply or fan
module have failed.
Communication failures: link or network connection has failed.
Modem failures: configured thresholds have been exceeded.
Chassis Connections
Connecting Alarms
3-3
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