Application Example; Functional Check - ASO Safety Solutions SK 35 Manuel D'utilisation

Application example

Safety-related monitoring of two PSS circuits with the SK 35 safety controller and a PLC-machinery
control system.
For the functional verification of the safety system the PLC performs a test signal and evaluates the
reaction of the safety controller prior to each dangerous movement or in a non dangerous phase /
movement of the machine. If the test is correct, the PLC starts the movement or the next working
step of the machine.
+24VDC
B1 X1 X2
SK 35
B2 13 14
1
K3
2
K1
A1
A2
0VDC

Functional Check

After appropriate connection of all required electrical connections and switching on the supply voltage,
the safety system must be checked for correct function. To do this, successively operate all PSSs
and monitor the associated reaction of the SK 35 safety controller.
The safety system is to be checked in proper time intervals by qualified personnel, and has to be
documented in such a way that it can be viewed and understood at any time. The requirements of
machine manufacturer are to be considered and kept.
Y1 Y2
Test
Signal
23 24
3
K3
4
K2
A1
A2
L1 L2 L3
A1 I1.1 I1.1
K1
1
PLC
2
Controller
M
A2 Q1.1 Q1.2
K3
A1
A2
L1 L2 L3
K2
3 5 1 3 5
4 6 2 4 6
M
19