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Kollmorgen
6.9.9.4
Control circuit dual channel SIL CL3/PLe (example)
The example shows a circuit diagram with one axis connected to an emergency stop cir-
cuit. The STO of the drives is switched by a protective screen. A dual channel switch-off
is used. The safe switching of the pulse inhibitor must be tested periodically by analyzing
the feedback signals (status) in the safety control.
The safety controller used in the example is manufactured by Pilz and fulfills at least the
PLe acc. to ISO 13849-1. Further information to the safety controllers are available from
Pilz. The use of safety controlelrs of other manufacturers is possible, if these also fulfill
the SIL CL 3 according to IEC 62061 and PLe according to ISO 13849-1.
+24VDC
0V
Consider the wiring instructions on page 39
S748-S772 Instructions Manual
11/2018
-S2
E-Stop
K1
A1
S11
S12
S21
S22
PNOZ S3
A2
S12
S34
13
-S1
14
Reset
Safety function STO, SIL CL3 / PLe, dual channel, 1 drive
K3
A1
PNOZ mm0p
A2
I2
I3
O0
Technical description
BTB
F1
14
15
K2
13
23
A1
14
24
A2
S3
O1
S4
STO2-Enable
STO1-Enable
STO2-Status
STO1-Status
Emergency-stop circuit
acc. to ISO 13849-1
PLe
Y1 Y2
Mains
contactor
X4
X4
5
X3B
14
X4
7
BTB
15
X4
45
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