Siemens SINUMERIK 840D sl Manual page 54

Interfaces
6.6 Digital inputs/outputs X122 and X132
Wiring diagram and block diagram
The following figure shows the wiring diagram based on an example of the NCU 710 and the
block diagram of the digital inputs and outputs.
Figure 6-8 Wiring diagram and block diagram of the digital inputs/outputs
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Manual, 07/2007, 6FC5397-0AP10-2BA0
NCU