Product information
Overview
Key Features
- Digital input capacity: Has 8 digital inputs, sink/source, in groups of 8.
- Input voltage and performance: Rated input voltage is 24 V DC, with 100 kHz digital inputs.
- Configuration: STEP 7 TIA Portal configurable/integrated from version V20 or higher.
- Cable length: Maximum cable length is 500 m shielded, 50 m shielded for HSC inputs, or 300 m unshielded.
- Diagnostics and protection: Has diagnostics, DIAG LED, input-status LED, and IP20 protection.
Technical Summary
| Product type | SB 1221, DI 8x 24 V DC 100 kHz |
|---|---|
| Digital inputs | 8; sink / source |
| Rated input voltage | 24 V DC |
| Input frequency | 100 kHz |
| Engineering software | STEP 7 TIA Portal configurable/integrated from version V20 or higher |
| Input current from backplane bus | 108 mA typ. |
| Power loss | 2.4 W typ. |
| Protection degree | IP20 |
Frequently Asked Questions
What is the exact product type of Siemens 6ES7221-3BF50-0XB0?
It is an SB 1221 digital input module with 8 DI 24 V DC 100 kHz inputs.
How are the digital inputs configured?
STEP 7 TIA Portal is configurable/integrated from version V20 or higher. Standard inputs are parameterizable, and interrupt inputs and technological functions are parameterizable.
What cable lengths are supported?
Maximum cable length is 500 m shielded, 50 m shielded for HSC inputs, or 300 m unshielded.
What information should be included for a quotation request?
Send the required quantity, destination, and project list or procurement context for model-specific quotation support.
