SICK C4P-SA09031A00 User Manual

4.4.2 External device monitoring (EDM)
Overview
T
he safety light curtain has internal external device monitoring.
The external switching elements (external device monitoring, EDM) must be inspected
in line with the regulations which apply at the place of installation or the required
reliability of the safety function.
External device monitoring (EDM) monitors the status of downstream contactors.
Prerequisites
•
P
ositively guided contactors are used for shutting down the machine.
Principle of operation
If y
ou configure external device monitoring, the safety light curtain then checks the
contactors after every interruption to the light path and before the machine restarts.
External device monitoring is then able to detect if one of the contactor’s contacts is
welded, for instance. In this case, the OSSDs remain in the OFF state.
24 V DC
k2
k1
K1
K2
0 V DC
OSSD 1
EDM
OSSD 2
r
Figure 22: Electrical diagram of external device monitoring (EDM)
Y
ou must implement external device monitoring electrically so that the two N/Cs (k1,
k2) close in a positively guided manner when the contactors (K1, K2) reach their
de-energized position once the protective device has responded. 24 V are then present
at the input of external device monitoring. If 24 V are not present once the protective
device has responded, one of the contactors is defective and external device monitor‐
ing prevents the machine from restarting.
4.4.3 Laser alignment aid
Important information
DANGER
H
azard due to lack of effectiveness of the protective device
The integrated laser alignment aid switches the OSSDs to the OFF state.
b
Make sure that the outputs of the safety light curtain do not have any effect on the
machine when the integrated laser alignment aid is activated.
b
Only use the integrated laser alignment aid to align the safety light curtain.
Prerequisites
•
A pushbut
ton is connected.
•
A switch is connected.
Pushbutton
T
he pushbutton is mounted at the system connection of the sender between the
system plug and the connecting cable.
4 P
ROJECT PLANNING
34
O P E R A T I N G I N S T R U C T I O N S | deTec4 8027140/2021-11-04 | SICK
Subject to change without notice

SICK C4P-SA09031A00 Specifications

General

Brand	SICK
Model	C4P-SA09031A00
Category	Safety Equipment
Language	English