Activating A Clamping Unit - Festo CAMC-G-S3 Manual

3 Mounting and installation
3.3.5

Activating a clamping unit

The safety function (e. g. STO – Safe Torque Off or SS1 – Safe Stop 1) is triggered by an input device
that makes the safety request. The safety request is sent along 2 channels via the input device S1 and
routes to the 2-channel switch-off of the output stage of the motor controller. At the same time, the
clamping unit is activated and monitored.
L
N
PE
24 V DC
0 V DC
K1
Input
device
2 for
safety
request
1
1
Only relevant connections drawn
1
T1: Motor controller with safety module
(only relevant connections shown)
2
S1: Input device for safety request
Fig. 3.6 Sample circuit, clamping unit
Notes with regard to the sample circuit:
– In the input circuit for the input devices for the safety request S1, the safety module CAMC-G-S3
detects cross-circuits for the acknowledgement pushbutton S2 and for the Start button S3.
– Actuating the Start button S3 commences the restart.
– The acknowledgement contact C1, C2 should be polled via the controller. If a safety request has
been made, the controller enable should be cancelled.
– If the safety module CAMC-G-S3 detects a violation of a safety condition or an error is pending, e. g.
in the connection wiring, it will indicate a malfunction. The error is acknowledged via the acknow­
ledgement pushbutton S2.
– The clamping unit is activated via the BR+/BR- output of the motor controller (T1) and monitored via
the switch S4 of the safety module CAMC-G-S3. (Note: Active pressure switches are used for this,
cross-circuit detection with DOUT42 is not possible!). The indirect monitoring shown requires a
regular performance test of the clamping unit.
Festo – GDCP-CAMC-G-S3-EN – 1406NH – English
1 3
S2 S3
13 13
14 14
2 4
2 19 20 11 12 21 22
Festo CMMP-AS-...-3A-M3
Y1
p
S4
2
V1
1 3
7 2 1
T1
with CAMC-G-S3
3
V1/Y1: Valve and clamping unit
S4: Pressure switch to monitor activation of
the clamping unit
9 21 1 2 7 8 9
3
155