Functional Description; General; Connections - EUCHNER CET3-AR Series Quick Start Manual

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
OA, OB Safety outputs. HIGH when the safety guard is
closed and locked.
IA, IB Inputs for series connection of AR devices from
EUCHNER
+UCM, Control input for guard locking solenoid. Connect
guard locking to 24 V DC to open.
0V (UCM)
OUT Monitoring output. HIGH when outputs OA and OB
are switched on (safety guard closed and locked).
Door monitoring output. HIGH when the actuator is
OUTD
within the operating distance and the CET is ready
for controlling guard locking (safety guard closed).
LED1 Input for controlling the installed red LED.
RST Input for resetting the switch
J Teach-in input
Input not connected
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1) You can find the current operating instructions on the Internet at www.euchner.de. Simply enter the order number into the
search field.
Subject to technical modifications, no responsibility is accepted for the accuracy of this information. © EUCHNER 2016
AP000152-05_03/16
Use in this example
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.
At B3 connected to 24V DC.
At B2 and B1 connected to OA and OB of the previous
device.
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.
Function is not used
Function is not used
Function is not used.
Activated via switch S5. All CET3 connected in series must
be reset simultaneously. Refer to the section "AR safety
switches connected in series".
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.
Only for ID No. 112921, 113958, 114090
This input must always be connected to GND.
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