Product Overview
Technical Summary
| Parameter | Value |
|---|---|
| Product type | SM 1221, DI 16×24 V DC |
| Digital inputs | 16 |
| Input configuration | Sink/Source |
| Rated input voltage | 24 V DC |
| Signal 0 | 5 V DC at 1 mA |
| Signal 1 | 15 V DC at 2.5 mA |
| Supply voltage | 24 V; 20.4 V to 28.8 V |
| Protection | IP20 |
Key Features
- Digital inputs: 16 digital inputs, arranged in groups of 4, with an IEC 61131 type 1 input characteristic curve.
- 24 V DC signal levels: Rated input voltage is 24 V DC; signal 0 is 5 V DC at 1 mA, and signal 1 is 15 V DC at 2.5 mA.
- Supply voltage: Rated supply voltage is 24 V, with a permissible range from 20.4 V to 28.8 V.
- Diagnostics and indication: The module has a diagnostic alarm and LEDs for input status.
- Input timing: Standard inputs have parameterizable times of 0.2 ms, 0.4 ms, 0.8 ms, 1.6 ms, 3.2 ms, 6.4 ms and 12.8 ms, selectable in groups of four.
- Installation and protection: IP20 protection; the module supports horizontal installation up to 50 °C with 16 inputs and vertical installation up to 40 °C with 16 inputs.
Frequently Asked Questions
1. How many digital inputs does the 6ES7221-1BH32-0XB0 have?
It has 16 digital inputs arranged in groups of 4.
2. What input signal levels does the module support?
The rated input voltage is 24 V DC. Signal 0 is 5 V DC at 1 mA, and signal 1 is 15 V DC at 2.5 mA.
3. What supply voltage is required?
The rated supply voltage is 24 V, with a permissible range from 20.4 V to 28.8 V.
4. Does the module provide diagnostics and input indication?
Yes. It has a diagnostic alarm and LEDs for input status.
5. What installation and protection details should be verified before inquiry?
Verify the installation orientation and temperature condition: 16 inputs are supported for horizontal installation up to 50 °C and vertical installation up to 40 °C. Protection is IP20.
