24 V DC
k2
k1
K1
K2
0 V DC
OSSD 1
EDM
OSSD 2
r
Figure 20: 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. 24V are then present
at the input of external device monitoring. If 24V 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 Application diagnostic output
The safety light curtain has an application diagnostic output on the system connection
and on t
he extension connection.
Depending on the configuration, the application diagnostic output signals a certain
status of the safety light curtain, e.g. if the reset pushbutton must be engaged or if
there is a weak signal at the receiver.
For a signal of the safety light curtain to be displayed, a light can be connected to
the application diagnostic output or the signal can be transmitted to the machine
controller.
Figure 21: Electrical diagram of the application diagnostic output
Further topics
•
"C
onfiguring application diagnostic output", page 59
4.4.4 Connection of sender and receiver
Overview
F
or a status display on both sides, you can connect the sender and receiver in the
control cabinet or via a T-connector.
The following information can be output:
•
Status of the protective field from the sender and receiver
•
Status indicator on the sender and receiver, e.g. whether muting is active
•
Diagnostic data on the sender and receiver via NFC or IO-Link.
If the sender and receiver are not connected to each other, this status information is
only indicated at the receiver.
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 C4P-EAxxx3SC05 8028570/2023-07-27 | SICK
Subject to change without notice
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