Subject to technical modifications, no responsibility is accepted for the accuracy of this information. © EUCHNER 2016
AP000152-05_03/16
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Functional description
General
The CET3 is a guard locking device according to EN ISO 14119 using the closed-circuit current principle. In this example 3 CET3-
AR are connected in series. The two safe outputs of the last CET3 are connected to a PNOZ s5 safety relay.
Connections
Designation
Function
Use in this example
OA, OB
Safety outputs. HIGH when the safety guard is
closed and locked.
Switch-off of at least one of the outputs leads to a direct
switch-off of the safety contacts (13 – 14, 23 – 24, …) of
the safety relay PNOZ s5.
Important: The actual shutdown of the energy which is
causing a hazard in a machine is not shown in the example
and must be supplemented.
IA, IB
Inputs for series connection of AR devices from
EUCHNER
At B3 connected to 24V DC.
At B2 and B1 connected to OA and OB of the previous
device.
+UCM,
0V (UCM)
Control input for guard locking solenoid. Connect
guard locking to 24 V DC to open.
Activated by switches S1, S3 and S4.
Important: According to EN ISO 14119, it shall be ensured
that the hazard caused by a machine has disappeared
before the guard locking can be released.
OUT
Monitoring output. HIGH when outputs OA and OB
are switched on (safety guard closed and locked).
Function is not used
OUTD
Door monitoring output. HIGH when the actuator is
within the operating distance and the CET is ready
for controlling guard locking (safety guard closed).
Function is not used
LED1
Input for controlling the installed red LED.
Function is not used.
RST
Input for resetting the switch
Activated via switch S5. All CET3 connected in series must
be reset simultaneously. Refer to the section “AR safety
switches connected in series”.
J
Teach-in input
Only for ID No. 109401, 113139, 113965, 114508,
114512.
The corresponding input must be connected to 24 V DC for
actuator teach-in (for this purpose, see the operating
instructions
1)
).
Important: for teach-in operation terminal 0V (UCM) has to
be connected to 0V not to a different potential or to an
output.
The input must be unconnected during operation.
---
Input not connected
Only for ID No. 112921, 113958, 114090
This input must always be connected to GND.
1) You can find the current operating instructions on the Internet at www.euchner.de. Simply enter the order number into the
search field.