18
Safety Relay
English
6.5 Example of use
Safety-related monitoring of a sensor circuit with primary PLC or machine control.
For a functional test of the protection, the PLC/machine control performs a test prior to each dangerous
movement or in the non-dangerous phase/movement of the machine . If the test result is correct, the PLC/
machine control then initiates the movement or the next work step.
X1
X2
8,
2
ΚΩ
A1
A2
K1
14
A1
A2
24VDC
0VDC
M
1
2
K1
3
4
5
6
L1 L2 L3
L1
N
PE
A2
A1
Q1.1 Q1.2
K2
A1
A2
13
1
2
K2
I1.1
PLC
Test
Signal
Se
nsor CH1
ELMON relay 31-33