553BTechnical specifications
A.5 Digital signal modules (SMs)
S7-1200 Programmable controller
System Manual, 11/2011, A5E02486680-05
689
A.5
Digital signal modules (SMs)
A.5.1
SM 1221 Digital Input Specifications
Table A- 56 General specifications
Model
SM 1221 DI 8 x 24 VDC
SM 1221 DI 16 x 24 VDC
Order number
6ES7 221-1BF30-0XB0
6ES7 221-1BH30-0XB0
Dimensions W x H x D (mm)
45 x 100 x 75
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 VDC)
4 mA / input used
4 mA / input used
Table A- 57 Digital inputs
Model
SM 1221 DI 8 x 24 VDC
SM 1221 DI 16 x 24 VDC
Number of inputs
8
16
Type
Sink/Source (IEC Type 1 sink)
Sink/Source (IEC Type 1 sink)
Rated voltage
24 VDC at 4 mA, nominal
24 VDC at 4 mA, nominal
Continuous permissible voltage
30 VDC, max.
30 VDC, max.
Surge voltage
35 VDC for 0.5 sec.
35 VDC for 0.5 sec.
Logic 1 signal (min.)
15 VDC at 2.5 mA
15 VDC at 2.5 mA
Logic 0 signal (max.)
5 VDC at 1 mA
5 VDC at 1 mA
Isolation (field side to logic)
500 VAC for 1 minute
500 VAC for 1 minute
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
500 m shielded, 300 unshielded