5 Function blocks
5.32 T, timing relay
Control Relay easy800
11/11 MN04902001Z-EN
www.eaton.com
261
Timing relay, on- and off-delayed with and without random switching
Time value I1: on-delay time
Time value I2: off-delay time
Random switching
The contact of the timing relay switches randomly within the setpoint value
ranges.
Figure 192:Operational diagrams timing relay, on and off delayed 1
1: Trigger coil T…EN
2: Stop coil T…ST
3: Reset coil T…RE
4: Switching contact (N/O contact) T…Q1
t
s1
: pick-up time
t
s2
: drop-out time
• Range A: The relay processes the two times without any interruption.
• Range B: The trigger coil drops out before the on-delay is reached.
• Range C: The stop coil stops the timeout of the on-delay.
• Range D: The stop coil has no effect in this range.
Figure 193:Operational diagrams timing relay, on and off delayed 2
• Range E: The stop coil stops the timeout of the off-delay.
• Range F: The reset coil resets the relay after the on delay has elapsed
• Range G: After the reset coil is activated, the internal time counter is reset.
The switching contact remains switched off. The function relay waits for a new trigger pulse.
A
B
C
1
2
4
3
D
t
t
s1
t
s2
t
s2
t
s1
t
s2
t
1
+
t
2
=
t
s1
E
F
t
1
+ t
2
= t
s2
G
1
2
4
3
t
t
s1
t
s1
