Function blocks
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www.EatonElectrical.com
MN05013005E
257
Timing relay
EZD provides 32 timing relays from T 01 to T 32.
A timing relay is used to change the switching duration and the
make and break times of a switching contact. The delay times
can be configured between 5 ms and 99 h 59 min.
Wiring a timing relay
You integrate a timing relay into your circuit in the form of a
contact and coil. The function of the relay is defined via the
parameter display. The relay is started via the trigger coil
T..EN and can be selectively reset via the reset coil T..RE.
The actual timeout running can be stopped via the third coil
T..ST.
Figure 132: EZD circuit diagram with timing relay.
Attention!
The shorter the cycle time, the faster the control and
regulation process.
Set as small a value for the set cycle time as possible. The
processing of the function blocks, reading of the inputs and
writing of outputs is only carried out once every cycle.
Exception: All function blocks that are processed
irrespective of the controller.
J
To prevent unpredictable switching states, use each coil of
a relay once only in the circuit diagram.
I 01---------------------------Ä T 02EN
I 02---------------------------Ä T 02RE
T 02Q1-------------------------Ä Q 01
I 03---------------------------Ä T 02ST
