Key Features
- Digital input configuration: SM 1221, DI 8×24 V DC with 8 digital inputs in groups of 2.
- Supply and input data: Rated value (DC): 24 V; permissible range, lower limit (DC): 20.4 V; permissible range, upper limit (DC): 28.8 V.
- Environmental and protection data: Conformal coating, IP20, and ambient temperature during operation: -25 °C to 60 °C; +70 °C for 10 min (OT1, ST1/ST2 acc. to EN 50155).
Technical Summary
| Product type designation | SM 1221, DI 8×24 V DC |
|---|---|
| Based on | 6ES7221-1BF32-0XB0 |
| Number of digital inputs | 8 |
| Input voltage, rated value (DC) | 24 V |
| Supply voltage, rated value (DC) | 24 V |
| Supply voltage, permissible range | 20.4 V to 28.8 V |
| Input current from backplane bus 5 V DC, max. | 105 mA |
| Input current from load voltage L+ (without load), max. | 4 mA; per channel |
| Power loss, typ. | 1.5 W |
| IP degree of protection | IP20 |
Applications
- 24 V DC digital input acquisition: For connecting 24 V DC digital input signals to 8 channels.
- Rail application use: For use in rail applications with the stated railway application and ambient conditions.
Frequently Asked Questions
What is the exact product type of 6AG2221-1BF32-1XB0?
It is an SM 1221, DI 8×24 V DC module.
How many digital inputs does 6AG2221-1BF32-1XB0 have?
It has 8 digital inputs in groups of 2.
What is the rated supply voltage for this Siemens module?
The rated value is 24 V DC, with a permissible range from 20.4 V to 28.8 V.
What are the key installation and protection details for this module?
It has IP20 protection, required front connector, and dimensions of 45 mm x 100 mm x 75 mm.
