Siemens S7-1200 System Manual page 893

Model
Filter times
Number of inputs on simultaneously
Cable length (meters)
Table A- 108 Wiring diagrams for the digital input SMs
SM 1221 DI 8 x 24 VDC (6ES7 221-1BF32-
0XB0)
①
Table A- 109 Connector pin locations for SM 1221 DI 8 x 24 VDC (6ES7 221-1BF32-0XB0)
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
SM 1221 DI 8 x 24 VDC
0.2, 0.4, 0.8, 1.6, 3.2, 6.4, and 12.8 ms
(selectable in groups of 4)
8
500 m shielded, 300 unshielded
For sinking inputs, connect "-" to "M" (shown). For sourcing inputs, connect "+" to "M".
Pin
1
2
3
4
5
6
7
SM 1221 DI 16 x 24 VDC (6ES7 221-1BH32-
0XB0)
X10
GND
No connection
1M
DI a.0
DI a.1
DI a.2
DI a.3
Technical specifications
A.7 Digital signal modules (SMs)
SM 1221 DI 16 x 24 VDC
0.2, 0.4, 0.8, 1.6, 3.2, 6.4, and 12.8 ms
(selectable in groups of 4)
16
500 m shielded, 300 unshielded
No connection
No connection
2M
DI a.4
DI a.5
DI a.6
DI a.7
X11
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