Key Features
- 8 digital inputs: Digital input module with Number of digital inputs: 8.
- 24 V DC input rating: Product type designation: SM 1221, DI 8×24 V DC; Rated value (DC): 24 V; Input voltage for signal "0": 5 V DC at 1 mA; Input voltage for signal "1": 15 V DC at 2.5 mA.
- Sink/source input type: Digital input module with sink/source input characteristic.
- Conformal coating: SIPLUS version with conformal coating for the printed circuit board assemblies.
- Required front connector: Connection method: required front connector.
- IP20 protection: IP degree of protection: IP20.
Applications
- 24 V DC digital signal acquisition: For connecting 24 V DC digital input signals to the module.
- Interrupt input monitoring: For parameterizable interrupt inputs with diagnostics, diagnostic alarm, and input status indication.
Technical Summary
| Product type designation | SM 1221, DI 8×24 V DC |
|---|---|
| Based on | 6ES7221-1BF32-0XB0 |
| Number of digital inputs | 8 |
| Input characteristic curve in accordance with IEC 61131, type 1 | Yes |
| Rated value (DC) | 24 V |
| Supply voltage permissible range, lower limit (DC) | 20.4 V |
| Supply voltage permissible range, upper limit (DC) | 28.8 V |
| Input current from backplane bus 5 V DC, max. | 105 mA |
| Power loss, typ. | 1.5 W |
| Parameterizable input filter times | 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 |
| Diagnostics function | Yes |
| Diagnostic alarm | Yes |
| IP degree of protection | IP20 |
Frequently Asked Questions
What is Siemens 6AG1221-1BF32-4XB0 used for?
It is an SM 1221 digital input module with 8 digital inputs for 24 V DC signals.
How many digital inputs does 6AG1221-1BF32-4XB0 have?
It has 8 digital inputs.
What supply voltage does 6AG1221-1BF32-4XB0 use?
Rated value (DC): 24 V. The permissible range is 20.4 V to 28.8 V.
Does 6AG1221-1BF32-4XB0 support diagnostics and alarms?
Yes. Diagnostics function: Yes; Diagnostic alarm: Yes.
What installation details should be checked for 6AG1221-1BF32-4XB0?
It requires a front connector, has IP20 protection, and the module dimensions are 45 mm wide, 100 mm high, and 75 mm deep.
