Product Overview
Technical Summary
| Product type designation | SM 1221, DI 16×24 V DC |
|---|---|
| Digital inputs | 16 |
| Input configuration | Sink/Source |
| Rated supply voltage | 24 V DC |
| Permissible supply voltage | 20.4 V to 28.8 V |
| Input voltage, signal 0 | 5 V DC at 1 mA |
| Input voltage, signal 1 | 15 V DC at 2.5 mA |
| Protection | IP20 |
| Product lifecycle | Active Product |
Key Features
- Product designation: SM 1221, DI 16×24 V DC digital input module.
- Digital inputs: 16 digital inputs, arranged in groups of 4.
- Input configuration: 24 V DC inputs with Sink/Source capability.
- Supply voltage: Rated supply voltage: 24 V DC; permissible range: 20.4 V to 28.8 V.
- Input characteristics: Signal 0: 5 V DC at 1 mA; signal 1: 15 V DC at 2.5 mA.
- Protection and diagnostics: IP20 protection, diagnostic alarm, and input-status LED indication.
Frequently Asked Questions
Which specifications distinguish 6ES7221-1BH32-0XB0?
The listed variant is an SM 1221 digital input module with 16 DI, 24 V DC, and Sink/Source inputs.
What input voltage values should be checked for this module?
Check 5 V DC at 1 mA for signal 0 and 15 V DC at 2.5 mA for signal 1.
What code and nameplate details should be verified?
Verify the complete order number 6ES7221-1BH32-0XB0 and the SM 1221, DI 16×24 V DC designation.
What information is needed for a quotation?
Provide the required quantity and destination together with the complete order number.
