Product Overview
Technical Summary
| Product type | SM 1221, DI 8×24 V DC |
|---|---|
| Digital inputs | 8 |
| Input grouping | In groups of 2 |
| Supply voltage | 24 V DC rated; 20.4 V to 28.8 V permissible range |
| Input signal "0" | 5 V DC at 1 mA |
| Input signal "1" | 15 V DC at 2.5 mA |
| Parameterizable standard inputs | 0.2 ms, 0.4 ms, 0.8 ms, 1.6 ms, 3.2 ms, 6.4 ms and 12.8 ms, selectable in groups of four |
| Protection | IP20 |
| Product lifecycle | Active Product |
Key Features
- Product type designation: SM 1221, DI 8×24 V DC
- Digital inputs: 8 inputs, in groups of 2
- Supply voltage: Rated value: 24 V DC; permissible range: 20.4 V to 28.8 V
- Input signal thresholds: Signal "0": 5 V DC at 1 mA; signal "1": 15 V DC at 2.5 mA
- Parameterizable standard inputs: Yes; 0.2 ms, 0.4 ms, 0.8 ms, 1.6 ms, 3.2 ms, 6.4 ms and 12.8 ms, selectable in groups of four
- Protection: IP20
Frequently Asked Questions
What does 6ES7221-1BF32-0XB0 identify?
It identifies the Siemens SM 1221 digital input, with 8 DI, 24 V DC, and Sink/Source operation.
Which specifications distinguish this configuration?
It has 8 digital inputs in groups of 2, a 24 V DC rated supply voltage, and a permissible supply range of 20.4 V to 28.8 V.
What details are needed for a quotation?
Provide the complete 6ES7221-1BF32-0XB0 code, required quantity, and destination.
