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Connecting Alarms
2-2 296-1011-202 Rel. 5.0, Doc. Rev. 02.01
CVX 600 Hardware Installation Guide
Connecting Alarms
Introduction
The SCC-LTM and SCC-RLTM 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 left six screw terminals on the
terminal block are available for visual alarms, such as lights; the right six screw
terminals are available for audible alarms, such as bells.
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:
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.
Alarm Possible Cause
Critical (Crit) Hardware failures: the system power supply and fan module have
failed, for example.
Major (Maj) Communication failures: the link or network connection has failed.
Minor (Min) Modem failures: the configured thresholds have been exceeded.