Sample Circuits - Festo CAMC-G-S3 Manual

3 Mounting and installation
3.3

Sample circuits

The following sample circuits each show a single-phase motor controller CMMP-AS-
C...-3A-M3. For three-phase motor controllers, the circuitry of [X9] must be adapted
accordingly.
Only one input / switching device is shown. However, all four two-channel inputs can be
used to request safety functions.
Please note
Some of the following sample circuits use passive sensors, such as emergency stop
switches, which are monitored using external clock signals. The digital outputs of the
safety module should be used as the source for these clock signals. This allows detec­
tion of the following errors:
– short circuits between input A and B, in the output circuit (DOUT4x) and in the input
circuit (DIN4x)
– shorts of a cable to 0 V or +24 V
Shorts between the input and output of the passive sensor are not detected or only
detected on actuation (via discrepancy monitoring). For this reason, preventative meas­
ures are required in the system wiring to avoid this error (error exclusion).
148 Festo – GDCP-CAMC-G-S3-EN – 1406NH – English