Product information
Overview
Key Features
- Digital input capacity: Has 4 digital inputs, current-sourcing, arranged in groups of 4.
- Input voltage: Rated input voltage is 24 V DC. For signal "0": (L+ minus 5.0 V DC) … L+ (1.4 … 0 mA); for signal "1": 0 V … (L+ minus 10 V DC (10 … 2.9 mA)).
- High-speed input capability: The product description specifies 200 kHz for the 4 DI, and input behavior is parameterizable for standard, interrupt and technological functions.
- Input current: Signal "0" maximum permissible quiescent current is 1.4 mA; signal "1" minimum is 2.9 mA and typical is 7 mA.
- Cable and diagnostics: Supports shielded twisted-pair cable up to 50 m and has an LED for input status indication.
- Power requirements: Backplane bus input current is typically 40 mA at 5 V DC; typical power loss is 1 W.
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 frequency | 200 kHz |
| Signal "0" input current, max. | 1.4 mA |
| Signal "1" input current, min. | 2.9 mA |
| Signal "1" input current, typ. | 7 mA |
| Standard input parameterization | 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 indication | Yes |
| Product lifecycle | Active Product |
Frequently Asked Questions
What is Siemens 6ES7221-3BD30-0XB0?
It is a SIMATIC S7-1200 SB 1221 digital input module with 4 current-sourcing DI, 24 V DC rated input and 200 kHz capability.
How many digital inputs does this SB 1221 module have?
It has 4 digital inputs, arranged in groups of 4.
What cable length is supported?
The maximum shielded cable length is 50 m using shielded, twisted-pair cable.
Can the input behavior be parameterized?
Yes. Parameterization is supported for standard inputs, interrupt inputs and technological functions; standard-input values include the listed μs and ms settings.
How can I request a quotation for this exact module?
Send the required quantity, destination and any project-list context for a model-specific quotation request.
