Key Features
- 4 digital inputs: 4 DI with current-sourcing inputs.
- 24 V DC input rating: Rated value (DC): 24 V.
- 200 kHz input designation: Product type designation: SB 1221, DI 4×24 V DC 200 kHz.
- Input status diagnostics: Diagnostics indication LED for status of the inputs: Yes.
Technical Summary
| Product type designation | SB 1221, DI 4×24 V DC 200 kHz |
|---|---|
| Number of digital inputs | 4; Current-sourcing |
| Rated value (DC) | 24 V |
| Input current from backplane bus 5 V DC, typ. | 40 mA |
| Power loss, typ. | 1 W |
| in groups of | 4 |
| for standard inputs – Parameterizable | Yes; 0.1 / 0.2 / 0.4 / 0.8 / 1.6 / 3.2 / 6.4 / 10.0 / 12.8 / 20.0 μs; 0.05 / 0.1 / 0.2 / 0.4 / 0.8 / 1.6 / 3.2 / 6.4 / 10.0 / 12.8 / 20.0 ms |
| for interrupt inputs – Parameterizable | Yes |
| for technological functions – Parameterizable | Yes |
| Diagnostics indication LED for status of the inputs | Yes |
| Product lifecycle | Active Product |
Applications
- 24 V DC digital signal monitoring: Monitoring 24 V DC digital input signals through 4 current-sourcing inputs.
- Interrupt input handling: Using parameterizable interrupt inputs for control tasks.
Frequently Asked Questions
What is the exact Siemens model designation for this module?
6ES7221-3BD30-0XB0, SB 1221, DI 4×24 V DC 200 kHz.
How many digital inputs does this module have?
It has 4 digital inputs.
What input rating is specified for the module?
The rated value (DC) is 24 V.
Does this input module support diagnostics for the input status?
Yes. It includes a diagnostics indication LED for the status of the inputs.
What cable length is specified for shielded wiring?
The maximum shielded cable length is 50 m; shielded, twisted pair.
