Product Overview
Technical Summary
| Product designation | SM 1221, DI 8×24 V DC |
|---|---|
| Based on | 6ES7221-1BF32-0XB0 |
| Digital inputs | 8 |
| Rated supply voltage | 24 V DC |
| Permissible supply voltage | 20.4 V to 28.8 V DC |
| Input groups | 2 |
| Operating temperature | -40 °C to 70 °C; start-up at -25 °C |
| Protection | IP20 |
| Lifecycle | Active Product |
Key Features
- Product designation: SM 1221, DI 8×24 V DC; based on 6ES7221-1BF32-0XB0.
- Digital inputs: 8 digital inputs, in groups of 2, with IEC 61131 type 1 input characteristic.
- Supply voltage: Rated supply voltage: 24 V DC; permissible range: 20.4 V to 28.8 V DC.
- Conformal coating: Conformal coating is provided, including Class 2 for high reliability and Type 1 protection against fouling.
- Operating temperature: Ambient temperature during operation: -40 °C to 70 °C; start-up at -25 °C. At Tmax > +60 °C, 4 inputs may be activated simultaneously for horizontal mounting.
- Protection and connection: IP20 degree of protection; required front connector; front enclosure material is plastic.
Applications
- Stationary industrial systems: The source states use in stationary industrial systems with biological, chemical, and mechanically active substances classified under EN 60721-3-3.
- Ships and sea use: The source states use on ships/at sea with biological, chemical, and mechanically active substances classified under EN 60721-3-6.
- Industrial process technology: The source states use in industrial process technology under EN 60654-4 and ANSI/ISA-71.04 environmental classifications.
Frequently Asked Questions
What product does Siemens order number 6AG1221-1BF32-2XB0 identify?
It identifies a SIPLUS S7-1200 SM 1221 digital input module with 8 DI and 24 V DC supply, based on 6ES7221-1BF32-0XB0.
Which specifications distinguish this MLFB variant?
The listed variant has conformal coating, -40…+70 °C operation, and start-up at -25 °C.
What code and nameplate details should be checked before inquiry?
Check the complete order number 6AG1221-1BF32-2XB0 and the product designation SM 1221, DI 8×24 V DC.
What quantity and destination are needed for a quotation?
Provide the required quantity and delivery destination for quotation.
