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IDEC SmartRelay functions
4.4.14 Operating hours counter
Short description
A configured time is triggered with a signal at the monitoring
input. The output is set when this time has expired.
Symbol in
IDEC
SmartRelay
Wiring
Input R
Input En
Input Ral
Description
A positive edge (0 to 1 transition)
at input R resets output Q and
sets a configured value MI at the
counter for the duration of the
time-to-go (MN).
En is the monitoring input. IDEC
SmartRelay scans the on-time
of this input.
A positive edge at input Ral (Reset all) resets both the Operating
hours counter (OT) and the output, and sets the configured value MI at the counter to for the
duration of the time-to-go (MN).
That is,
• output Q = 0,
• measured operating time OT =
0 and
• the time-to-go of the maintenance interval MN = MI.
IDEC SmartRelay Manual
153