Technical Summary
| Product type designation | SB 1221, DI 4×24 V DC 200 kHz |
|---|---|
| Number of digital inputs | 4; Current-sourcing |
| Input voltage, rated value (DC) | 24 V |
| Input current from backplane bus 5 V DC, typ. | 40 mA |
| Power loss, typ. | 1 W |
| 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 |
| Interrupt inputs, parameterizable | Yes |
| Technological functions, parameterizable | Yes |
| Diagnostics indication LED for status of the inputs | Yes |
| Product lifecycle | Active Product |
Key Features
SIMATIC S7-1200 SB 1221 module
Digital input SB 1221 for the SIMATIC S7-1200 family.
Digital input SB 1221 for the SIMATIC S7-1200 family.
4 digital inputs
Provides 4 current-sourcing digital inputs.
Provides 4 current-sourcing digital inputs.
24 V DC, 200 kHz
Input rating is 24 V DC with 200 kHz.
Input rating is 24 V DC with 200 kHz.
Parameterizable input behavior
Standard inputs are parameterizable with multiple timing values.
Standard inputs are parameterizable with multiple timing values.
Interrupt and technological functions
Interrupt inputs and technological functions are parameterizable.
Interrupt inputs and technological functions are parameterizable.
Applications
24 V DC digital signal input
For receiving 24 V DC digital input signals.
For receiving 24 V DC digital input signals.
Interrupt-based input handling
For input use where interrupt inputs are needed.
For input use where interrupt inputs are needed.
Configurable input timing
For input processing with parameterizable timing values.
For input processing with parameterizable timing values.
Frequently Asked Questions
What is the exact product model of this Siemens SB 1221 module?
6ES7221-3BD30-0XB0, identified as SB 1221, DI 4×24 V DC 200 kHz.
How many digital inputs does 6ES7221-3BD30-0XB0 provide?
It provides 4 digital inputs.
What is the input rating of this SB 1221 digital input module?
The rated input value is 24 V DC.
What is the maximum cable length for this module with shielded cable?
The maximum cable length is 50 m; shielded, twisted pair.
