Product Overview
Technical Summary
| Product type designation | SM 1221, DI 16×24 V DC |
|---|---|
| Based on | 6ES7221-1BH32-0XB0 |
| Digital inputs | 16 |
| Supply voltage | 24 V DC |
| Permissible supply voltage | 20.4 V to 28.8 V DC |
| Input grouping | In groups of 4 |
| Input characteristic | IEC 61131, type 1 |
| Protection | IP20 |
| Lifecycle | Active Product |
Key Features
- Product designation: SM 1221, DI 16×24 V DC.
- Digital inputs: 16 digital inputs, in groups of 4.
- Supply voltage: Rated supply voltage: 24 V DC; permissible range: 20.4 V to 28.8 V DC.
- Input characteristics: Input characteristic curve in accordance with IEC 61131, type 1.
- Conformal coating: Conformal coating for printed circuit board assemblies acc. to EN 61086, Class 2 for high reliability.
- Operating temperature: Ambient temperature during operation: -20 °C to 60 °C; cold restart minimum: 0 °C.
Frequently Asked Questions
What does Siemens 6AG1221-1BH32-4XB0 identify?
It identifies a SIPLUS S7-1200 SM 1221 digital input module with 16 inputs at 24 V DC.
Which specifications distinguish this exact variant?
The listed variant has conformal coating, an operating temperature range of -20 °C to 60 °C, and is based on 6ES7221-1BH32-0XB0.
What should be checked when verifying the MLFB?
Check the complete order number 6AG1221-1BH32-4XB0, the product designation SM 1221, DI 16×24 V DC, and the nameplate details.
What information is needed for a quotation?
Provide the required quantity and destination together with the complete order number.
