Manufacturer: Siemens
Family: S7-1200
Type: Digital Input Module
Model: SM 1221
MRN: 6ES7221-1BH32-0XB0
Supply voltage: 24 V DC
Input Current: max. 130 mA- from backplane bus 5 V DC
No. of digital inputs: 16
Input voltage: 24 V DC
Input delay: 0.2 ms, 0.4 ms, 0.8 ms, 1.6 ms, 3.2 ms, 6.4 ms and 12.8 ms ; selectable
Cable length: 500 m shielded
Digital inputs: max. 4 mA/ channel -from load voltage L+
Power loss: 2.5 W
Protection: IP20
Operating temp.: -20°C…60°C
Dimensions mm: 45 x 100 x 75
Weight: approx. 0.16 kg