Operating Instructions
Non-Contact Safety Switch CES-AH-C03-AH-SM
14
(Translation of the original operating instructions) 106595-09-06/20
8.10. Connection example
Within the device, the shutdown of the two outputs LA and LB is dual-channel. As such, each of the outputs represents a
separate safety output.
Internal
logic
UB
7
+LB
5
+LA
4
START
2
LA
3
LB
6
NC
1
NC
9
0V
8
START
Feedback
loop
Feedback
loop
U
B
GND
1)
2)
1)
2)
1) Load, e.g. valve coil, DC motor, ohmic load, etc.
2) In case of inductive loads, it is imperative free-wheeling diodes are used to protect the outputs on the safety switch.
Figure 2:
Connection example with start button and feedback loop
CAUTION
Ì
A short circuit between the cables on the safety outputs LA and LB and another cable must be
prevented.
Ì
In certain circumstances, fault exclusion as per EN 13849-1, section 7.3, can be applied; see also
EN 13849-2, section D.5.2.
Ì
The CES-AH represents a subsystem as per EN 13849-1 and complies with PL d. To integrate the
switch in a category 3 structure, it is necessary to monitor the downstream load (the feedback
loop must be monitored).
Ì
This example shows only an excerpt that is relevant for connection of the CES AH system. The ex-
ample illustrated here does not show complete system planning. The user is responsible for safe
integration into the overall system.
