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4 Wiring with
4.10 Timing Relay
Operating instructions
05/10 MN05013003Z-EN
www.eaton.com
127
4.10.5 Function of the timing relay function relay
4.10.5.1 Timing relay, on delayed with and without random switching
Time value I1: on-delay time
Random switching: The contact of the timing relay switches randomly within
the setpoint value range.
Figure 63:
Signal diagram of timing relay, on-delayed
(with and without random switching)
1: trigger coil TTx
2: Stop coil HTx
3: Reset coil RTx
4: Switch contact (make) Tx
t
s
: Setpoint time
• Range A: The set time elapses normally.
• Range B: The entered setpoint does not elapse normally because the trigger coil drops out prematurely.
• Range C: The Stop coil stops the time from elapsing.
Figure 64:
Signal diagram of timing relay, on-delayed
(with and without random switching)
• Range D: The Stop coil is inoperative after the time has elapsed.
• Range E: The Reset coil resets the relay and the contact.
• Range F: After the reset coil is activated, the switching contact is switched off and the internal time
counter is reset. The function relay waits for a new trigger pulse.
Retriggering during response delay
If the trigger coil drops out while the on-delay time is running down, the
timing relay stops the on-delay time and resets the actual value t to 0. After
the trigger coil is set again, the entire on-delay time is run down.
t
1
+
t
2
=
t
s
t
A
B
t
s
1
2
4
3
C
t
F
D
E
t
s
1
2
4
3
t
s
F
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