Product Description
Key Features
- Exact product identity: SIMATIC S7-1200 Digital input SB 1221, order number 6ES7221-3BD30-0XB0; product type designation: SB 1221, DI 4×24 V DC 200 kHz.
- Digital input capacity: Has 4 digital inputs, current-sourcing, in groups of 4.
- Input rating: Rated input voltage: 24 V DC.
- High-speed input: The supplied product description specifies 200 kHz operation.
- Input diagnostics: LED indication for input status is available.
- Lifecycle data: Lifecycle: Active Product.
Technical Summary
| Product type | SB 1221, DI 4×24 V DC 200 kHz |
|---|---|
| Digital inputs | 4; Current-sourcing |
| Rated input voltage | 24 V DC |
| Input current from backplane bus | 5 V DC, typ.: 40 mA |
| Power loss | typ.: 1 W |
| Signal 0 input current | max. 1.4 mA |
| Signal 1 input current | min. 2.9 mA; typ. 7 mA |
| Parameterizable standard inputs | 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 |
| Input status LED | Yes |
| Lifecycle | Active Product |
Frequently Asked Questions
What exact Siemens order number should be checked?
Check order number 6ES7221-3BD30-0XB0 and the SB 1221 product type designation.
How many digital inputs does this module have?
It has 4 current-sourcing digital inputs, arranged in groups of 4.
What input voltage is specified?
The rated input voltage is 24 V DC.
What cable length is supported?
The maximum shielded cable length is 50 m using a shielded, twisted pair.
