Festo Checkbox Compact CHB-C-X, Manual

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2. Fitting and commissioning
2−12
Festo P.BE−CB−COMP−en en 0503c
2.4.3 Power supply for external components
If you connect the Checkbox via the connections PLC,
ACTUATOR or BUFFER/FEEDER with other devices (e.g. PLC,
conveyor device), note the following:
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 at the
24 V DC plug with other plugs on the Checkbox or with
other devices will in some cases bridge the fitted filter.
Asymmetries of the currents in the outgoing and return
lines will reduce the effect of the filter.
·
Use a separate power unit for the Checkbox. Provide a
separate power supply for connected current−consuming
devices.
·
Do not connect the 24 V potential and GND at the
24VDC" connection of the Checkbox with other plugs of
the Checkbox or with other devices.
·
Make sure that the currents of the inputs and outputs
flow via the Checkbox and not directly to the power unit.
CHB−C−P/..X
Current−consuming devices can also be supplied with voltage
via the PLC plug. Note also the information in chapter 4.3.