Technical Summary
| Product type designation | SM 1221, DI 8×24 V DC |
|---|---|
| Based on | 6ES7221-1BF32-0XB0 |
| Number of digital inputs | 8 |
| Rated value (DC) | 24 V |
| Supply voltage range | 20.4 V to 28.8 V |
| Input current from backplane bus 5 V DC, max. | 105 mA |
| Power loss, typ. | 1.5 W |
| Input characteristic curve in accordance with IEC 61131, type 1 | Yes |
| IP degree of protection | IP20 |
| Ambient temperature during operation | -25 °C to 60 °C; +70 °C for 10 min (OT1, ST1/ST2 acc. to EN 50155) |
| Connection method | required front connector |
Applications
Digital input handling for 8 DI channels at 24 V DC.
Key Features
SM 1221, DI 8×24 V DC for digital input handling.
Configured as a SIPLUS variant based on 6ES7221-1BF32-0XB0.
Printed circuit board assemblies with conformal coating for high reliability.
-25…+60 °C, with OT1 and ST1/ST2 support for +70 °C for 10 minutes.
IP20 degree of protection.
Connection method requires the front connector.
Frequently Asked Questions
What is Siemens 6AG2221-1BF32-1XB0?
It is a SIPLUS S7-1200 SM 1221 digital input module.
How many digital inputs does 6AG2221-1BF32-1XB0 have?
It has 8 digital inputs.
What is the rated voltage of this SM 1221 module?
The rated value is 24 V DC.
What operating temperature range is specified for 6AG2221-1BF32-1XB0?
The operating range is -25…+60 °C, with +70 °C for 10 minutes under OT1 and ST1/ST2.
Is a front connector required for this module?
Yes, the required front connector is specified.
