Power Supply For External Components - Festo Checkbox Compact CHB-C-C Manual

2. Fitting and commissioning

2.3.3 Power supply for external components

Festo P.BE-CB-COMP-EN en 0211a
Please note the following if you connect the Checkbox to
other devices (e.g. PLC, conveyor device) via the connections
PLC, ACTUATOR or BUFFER/FEEDER:
Please note
In order to comply with the EMC limits, the Checkbox is
equipped with a filter for the operating voltage.
A connection between the 24 V potential and GND on the
24 V DC plug with other plugs on the Checkbox or with
other devices will in some cases overbridge the fitted filter.
Asymmetries in the currents in the outward and return
lines reduce the effectiveness of the filter.
Use a separate power unit for the Checkbox. Provide a
S
separate power supply for connected devices.
Do not connect the 24 V potential or GND on the 24 V DC
S
connection of the Checkbox with other plugs on the
Checkbox or with other devices.
Make sure that the currents of the inputs and outputs
S
flow via the Checkbox and that they do not reach the
power unit directly.
Checkbox PLC
Current-consuming devices can also be supplied with power
via the PLC plug. Please refer here to the information in
chapter 4.3.
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