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4.4 Failsafe Alarm Relay Wiring
The “Failsafe” output relay is provided to signal critical error conditions that may occur on the
RS416. 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. The failsafe
relay current and power handling capabilities are defined in
Figure 12: Failsafe Alarm Relay Wiring