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Control and Alarm Relay Contact Information
Control Relays
ATTENTION: Control relays operate in the standard control
mode (that is, energized when output state is on).
Table 3-2: Control Relay Contact Information
Unit
Power
Control Relay
Wiring
Control Relay
Contact
Output #1 or #2 Indicator
Status
Off N.O. Open Off
N.C. Closed
On N.O. Open Off
Closed On
N.C. Closed Off
Open On
Alarm Relays
ATTENTION: Alarm relays are designed to operate in a failsafe
mode (that is, de-energized during alarm sate). This results in
alarm actuation when power is OFF or when initially applied,
until the unit completes self-diagnostics. If power is lost to the
unit, the alarms will de-energize and thus the alarm contacts
will close.
Chapter 3 - Installation
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