Siemens SIMATIC S7-1500 System Manual page 130

Connecting
8.7 Digital inputs and digital inputs/outputs X122, X132 and X142
Assignment of the input/outputs to functions is freely configurable. Technology functions (for
example measuring input and output cam) can also be assigned to the inputs/outputs.
Table 8- 1
Electrical isolation
Use as:
Inputs/outputs assigned
to the CPU
Inputs/outputs assigned
to SINAMICS Integrated
Inputs of measuring input No
Cam outputs
Oversampling DI
Oversampling DQ
Event/period duration
measurement
Pulse width modulation
PWM
Configuration:
Assignment
You can assign the inputs/outputs with frame 39x of the CPU (see also section
1)
Configuration of the digital inputs and digital inputs/outputs (X122/X132) (Page 195)).
Note
Shielded cables are required to ensure the best possible immunity of the digital inputs if they
are being used as measuring inputs.
Power supply for X142 digital inputs/outputs
If you use the X142 digital inputs/outputs partly as inputs and partly as outputs (mixed
operation), you need to supply the digital inputs over the same power supply as the SIMATIC
Drive Controller (X124 module supply).
This restriction does not apply if you operate the X142 digital inputs/outputs exclusively as
inputs or as outputs.
The X122/X132 digital inputs/outputs are not affected by this restriction.
128
Use
X122, X132
DI0 to DI7, DI17, DI18,
DI20, DI21
Isolated
(ground reference M1
or M2)
Yes
1)
Yes
No
No
No
No
No
Configurable channel-
by-channel on the drive
X142
DI/DQ 8 to 15 DI/DQ 0 to 7
Non-isolated Non-isolated
(ground reference M) (ground reference M)
Yes Yes
1)
Yes No
Yes Yes
Measuring using cen- Measuring using Timer
tral measuring input DI
Measurement using
PROFIdrive telegram
Yes Yes
1)
DQ can be used as cam Timer DQ can be used
output as high-precision cam
output
No Yes
No Yes
No Yes
No Yes
Configurable channel- Configurable channel-
by-channel on the drive by-channel on the CPU
System Manual, 11/2023, A5E46600094-AD
SIMATIC Drive Controller