Product Overview
Technical Summary
| Parameter | Value |
|---|---|
| Product type | SB 1221, DI 8x 24 V DC 100 kHz |
| Digital input channels | 8; sink / source |
| Rated input voltage | 24 V DC |
| Input signal 0 | 5 V DC or 0.5 mA |
| Input signal 1 | 15 V DC at 2.5 mA |
| Input frequency | 100 kHz |
| Backplane bus current | 108 mA at 5 V DC, typical |
| Protection degree | IP20 |
Applications
- Digital signal acquisition: Acquires 24 V DC digital signals through 8 sink/source digital inputs.
Key Features
- Digital input channels: 8 digital inputs, sink/source, arranged in groups of 8.
- Input voltage: Rated input voltage: 24 V DC; signal 0: 5 V DC or 0.5 mA; signal 1: 15 V DC at 2.5 mA.
- High-speed input performance: Digital inputs support 100 kHz.
- Configurable input timing: Standard inputs support parameterizable times from 0.1 μs to 20.0 μs and from 0.05 ms to 20.0 ms.
- Diagnostics and isolation: Diagnostics function, DIAG LED, and input-status indication are provided. There is no potential separation between channels; channels and the backplane bus have 707 V DC type-test separation.
- Dimensions and protection: Packaging dimensions: 82.00 x 34.00 x 79.00 mm. Protection degree: IP20.
Frequently Asked Questions
1. How many digital inputs does the 6ES7221-3BF50-0XB0 provide?
It provides 8 digital inputs, sink/source, in groups of 8.
2. What input voltage does the SB 1221 use?
The rated input voltage is 24 V DC. Signal 0 is 5 V DC or 0.5 mA, and signal 1 is 15 V DC at 2.5 mA.
3. What input speed is supported?
The digital inputs support 100 kHz.
4. Does the module provide diagnostics?
Yes. It has a diagnostics function, a DIAG LED, and input-status indication.
5. What should be verified before requesting a quote?
Verify the exact order number, 8-channel sink/source input configuration, 24 V DC signal requirements, 100 kHz performance, and IP20 protection degree.
