Pin assignment   
Table 8-18 X122 digital inputs/outputs
Pin Signal 
name
Signal 
type
Meaning Default set‐
ting
1 DI0 I Digital input 0
Input ON/OFF1 infeed (if one infeed with a DRIVE-CLiQ 
connection is operated at the NCU)
x
2 DI1 I Digital input 1
Input 2. Operating condition OFF3 drives
"OFF3 – rapid stop"
Braking with a congurable OFF3 ramp (p1135, p1136, 
p1137); thereafter, pulse suppression and switching on 
inhibited. The drive stops controlled. The braking re‐
sponse can be set separately for each SERVO.
x
3 DI2 I Digital input 2
Selection safe standstill group 1
SH/SBC - Group 1 SINAMICS Safety Integrated (SH = 
p9601 release)
---
4 DI3 I Digital input 3
Selection safe standstill group 2
SH/SBC - Group 2 SINAMICS Safety Integrated (SH = 
p9601 release)
---
5 DI16 I Digital input 16
Freely available
---
6 DI17 I Digital input 17
Freely available
---
7 G1 GND Ground for DI0 - DI3, DI16, DI17 (isolated with respect 
to M)
 
8 M GND Ground for DI8 - DI11  
9 DI/DO8 B Digital input/output 8 (rapid input)
Status safe standstill group 1
SH/SBC - Group 1
SINAMICS Safety Integrated
---
10 DI/DO9 B Digital input/output 9 (rapid input)
Status safe standstill group 2
SH/SBC - Group 2 
SINAMICS Safety Integrated
---
11 M GND Ground for DI8 - DI11 ---
12 DI/DO10 B Digital input/output 10 (rapid input)
Input, external zero mark - BERO 1
---
13 DI/DO11 B Digital input/output 11 
(rapid input)
Input, probe 1 - central 
measuring (check that 
MD13210 = 0)
x
Input, probe 1 - distributed 
measurement (check that 
MD13210 = 1)
---
Connecting
8.10 Digital inputs/outputs
NCU 1750
Equipment Manual, 01/2022, A5E45627807B AE 81