Siemens SIMATIC S7-1200 - A.9 Digital signal modules (SMs); A.9.1 SM 1221 digital input specifications

Technical specifications
A.9 Digital signal modules (SMs)
S7-1200 Programmable controller
1442 System Manual, V4.2, 09/2016, A5E02486680-AK
A.9
Digital signal modules (SMs)
A.9.1
SM 1221 digital input specifications
Table A- 106 General specifications
Model
SM 1221 DI 8 x 24 V DC
SM 1221 DI 16 x 24 V DC
Article number
6ES7221-1BF32-0XB0
6ES7221-1BH32-0XB0
Dimensions W x H x D (mm) 45 x 100 x 75
Weight
170 grams
210 grams
Power dissipation 1.5 W 2.5 W
Current consumption (SM Bus)
105 mA
130 mA
Current consumption (24 V DC)
4 mA / input used
Table A- 107 Digital inputs
Model
SM 1221 DI 8 x 24 V DC
SM 1221 DI 16 x 24 V DC
Number of inputs
8
16
Type
Sink/Source (IEC Type 1 sink)
Rated voltage
24 V DC at 4 mA, nominal
Continuous permissible voltage
30 V DC, max.
Surge voltage
35 V DC for 0.5 sec.
Logic 1 signal (min.)
15 V DC at 2.5 mA
Logic 0 signal (max.)
5 V DC at 1 mA
Isolation (field side to logic)
707 V DC (type test)
Isolation groups
2
4
Filter times 0.2, 0.4, 0.8, 1.6, 3.2, 6.4, and 12.8 ms
(selectable in groups of 4)
0.2, 0.4, 0.8, 1.6, 3.2, 6.4, and 12.8 ms
(selectable in groups of 4)
Number of inputs on simultaneously
8
16
Cable length (meters)
500 m shielded, 300 unshielded