Siemens 6ES7 221-1BH32-0XB0 Digital Input Module
SIEMENS SIMATIC S7-1200 SM 1221 DC DIGITAL INPUT MODULE
The Siemens SM 1221 DC is a high-efficiency digital input module from the SIMATIC S7-1200 family, engineered for reliable signal acquisition in compact automation systems. It offers precision performance with selectable input delay times, wide operating temperatures, and IP20-rated protection for industrial environments.
Manufacturer: Siemens
Family: SIMATIC S7-1200
Type: Digital Input Module
Model: SM 1221 DC
MRN: 6ES7221-1BH32-0XB0
SN: ZVE4YAY036744
| 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 | Selectable (0.2 ms to 12.8 ms) |
| Cable Length | 500 m (shielded) |
| Digital Inputs | max. 4 mA/channel (from load voltage L+) |
| Power Loss | 2.5 W |
| Protection | IP20 |
| Operating Temperature | -20°C to 60°C |
| Dimensions (mm) | 45 x 100 x 75 |
