Technical Summary
| Product type designation | SM 1221, DI 8×24 V DC |
|---|---|
| Based on | 6ES7221-1BF32-0XB0 |
| Digital inputs | 8 |
| Input voltage, rated value (DC) | 24 V |
| Supply voltage, rated value (DC) | 24 V |
| Supply voltage, permissible range (DC) | 20.4 V … 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 … 60 °C; +70 °C for 10 minutes (OT1, ST1/ST2 acc. to EN 50155) |
Key Features
SIPLUS S7-1200 SM 1221 variant
Based on 6ES7221-1BF32-0XB0 and identified as SM 1221 8DI T1 rail.
Based on 6ES7221-1BF32-0XB0 and identified as SM 1221 8DI T1 rail.
8 digital inputs
Digital input module with 8 DI.
Digital input module with 8 DI.
24 V DC sink/source inputs
Input type is 24 V DC, sink/source.
Input type is 24 V DC, sink/source.
Conformal coating
Includes conformal coating for the module.
Includes conformal coating for the module.
Rail temperature detail
Operating range is -25…+60 °C, with OT1 and ST1/2 (+70 °C for 10 minutes).
Operating range is -25…+60 °C, with OT1 and ST1/2 (+70 °C for 10 minutes).
Applications
24 V DC digital signal acquisition
For connecting 24 V DC digital input signals to the module's 8 DI channels.
For connecting 24 V DC digital input signals to the module's 8 DI channels.
Frequently Asked Questions
What is Siemens 6AG2221-1BF32-1XB0 in the SIPLUS S7-1200 range?
It is a SIPLUS S7-1200 SM 1221 RAIL digital input module.
How many digital inputs does 6AG2221-1BF32-1XB0 provide?
It provides 8 digital inputs.
What are the input and supply voltage ratings for 6AG2221-1BF32-1XB0?
The input voltage rated value is 24 V DC, and the supply voltage rated value is also 24 V DC.
What is the operating temperature range of 6AG2221-1BF32-1XB0?
The operating temperature range is -25…+60 °C, with +70 °C for 10 minutes under OT1, ST1/ST2.
What are the dimensions of 6AG2221-1BF32-1XB0?
The dimensions are 45 mm x 100 mm x 75 mm.
