IDEC SmartRelay functions
IDEC SmartRelay Manual
191
4.4.22 Current impulse relay
Short description
A short pulse at the input sets and resets the output.
Trg
Q
R
S
The bold printed section of
the timing diagram is also
shown in the symbol for the
current impulse relay.
Timing diagram
Functional description
Output Q changes its status; that is, the output is set or reset
with each 0 to 1 transition at input Trg and if the inputs S and
R = 0.
The signal at input Trg does not influence the special
function when S or R = 1.
You set the current impulse relay with a signal at input S.
The output is set hi.
You reset the current impulse relay with a signal at input R.
The output is set lo.
Symbol in IDEC
SmartRelay
Wiring
Description
Input Trg
You set and reset output Q with a
signal at input Trg (Trigger).
Input S
You set output Q with a signal at input
S.
Input R
You reset output Q with a signal at
input R.
Parameter Selection:
RS (R input priority) or
SR (S input priority)
Retentivity:
/ = No retentivity
R = The status is retentive.
Output Q
Q is set with a signal at Trg, and reset
with the next signal at Trg, if S and R =
0.
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