Connecting
7.9 Digital inputs/outputs
NCU 7x0.3 PN
Manual, 09/2011, 6FC5397-1EP40-0BA0
73
NOTICE
The fast digital inputs/outputs must be shielded.
7.9.3 Connecting digital inputs/outputs
Cable specification
Table 7- 27 Cable specification at X122 / X132 / X142
Characteristics Version
Connector type Spring-loaded terminals
Connection option 0.2 to 1.5 mm
2
Max. current carrying capacity 6 A
Max. cable length 30 m
Note
To achieve optimum interference suppression, shielded cables must be used to connect
measuring inputs or BEROs.
Wiring digital inputs/outputs
1. Strip 10 mm of insulation from the wires.
2. Wire the digital inputs of the interface for connection of the sensors.
3. Wire the digital outputs of the interface for connection of the actuators.
4. Insert the cable into the corresponding spring-loaded terminal.
Using shielded cables
When using a shielded cable for the bidirectional inputs/outputs, the following options are
available for the shield connection:
1. Attach the cable shield to a grounded shielding bus immediately after the cable entry
point in the cabinet (strip the insulation off the cable for this purpose).
2. Continue routing the shielded cable as far as the module but do not make a connection to
the shield there.
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