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4.4 Failsafe Alarm Relay Wiring and Specifications
The “Failsafe” output relay is provided to signal critical error conditions that may occur on the
M2000 series switches. The contacts are energized upon power up of the unit and remain
energized until a critical error occurs. The proper relay connections are shown in Figure 12. One
common application for this output is to signal an alarm if a power failure or removal of control
power occurs.
Figure 12: Failsafe Alarm Relay Wiring