Connecting Digital Inputs/Outputs - Siemens NCU 7x0.3 PN Series Manual

NOTICE
The fast digital inputs/outputs must be shielded.
7.9.3

Connecting digital inputs/outputs

Cable specification
Table 7- 27
Characteristics
Connector type
Connection option
Max. current carrying capacity
Max. cable length
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
2. Continue routing the shielded cable as far as the module but do not make a connection to
NCU 7x0.3 PN
Manual, 09/2011, 6FC5397-1EP40-0BA0
Cable specification at X122 / X132 / X142
point in the cabinet (strip the insulation off the cable for this purpose).
the shield there.
Version
Spring-loaded terminals
0.2 to 1.5 mm
2
6 A
30 m
Connecting
7.9 Digital inputs/outputs
73