4 Wiring with 800
4.4 Circuit diagram elements
106
Control Relay easy800
11/11 MN04902001Z-EN
www.eaton.com
A coil is automatically switched off in the event of a power failure and in
STOP mode. Exception: retentive coils retain the 1 state (
“Retentive data storage”, page 308).
“Set”
S
and “Reset”
R
coil function
The Set
S
and Reset
R
coil functions are normally used in pairs.
The relay picks up when the coil is set (A) and remains in this state until it is
reset (B) by the coil function.
The supply voltage is switched off (C), the coil is not retentive.
Figure 86:Set and Reset signal diagram
If both coils are actuated simultaneously, the coil with the higher rung
number has priority, in this case the reset coil, as shown in the signal
diagram at (B).
Figure 87:Simultaneous triggering of
Q
01
The above example shows the Reset coil with priority when the Set and
Reset coil are triggered at the same time.
Coil negation (inverse contactor function)
Å
The output signal follows the inverted input signal, the relay works like a
contactor with negated contacts. If the coil is set to 1, the coil will switch its
make contacts to 0.
Figure 88:Inverse contactor function signal diagram
on
on
S
R
on
A
B
C
I 05---------------------------S Q 01
I 10---------------------------R Q 01
on
on
