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Safety function blocks
504
02/16 MN05013001Z EN
Timing relay, single pulse
Figure 264:
Signal diagram "timing relay, pulse shaping"
a
The Trigger pulse is short, the contact TS..QS stays closed for
the duration of the t
s
pulse.
b
The trigger pulse is longer than the set time for pulse duration
t
s
. The contact TS..QS stays closed only for the pulse duration t
s
.
c
The Stop coil stops the run down of the time t
s.
d
The dropping out of the coil TS..SA causes the timing relay to
deactivate and the contact TS..QS opens.
TS..SA
TS..TR
TS..QS
TS..ST
t1 + t2 = ts
t2
t1
ts
ts
a
b
d
c
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