Key Features
- SIPLUS S7-1200 SM 1221 digital input module: Digital input module for the S7-1200 family, designated SM 1221 16DI.
- 16 DI, 24 V DC: Provides 16 digital inputs for 24 V DC signals.
- Conformal coating and temperature range: Includes conformal coating and a -20…+60 °C operating range.
- Sink/source: Input type is sink/source.
Technical Summary
| Product type designation | SM 1221, DI 16×24 V DC |
|---|---|
| Based on | 6ES7221-1BH32-0XB0 |
| Number of digital inputs | 16 |
| Input voltage, rated value (DC) | 24 V |
| Supply voltage, rated value (DC) | 24 V |
| Supply voltage, permissible range, lower limit (DC) | 20.4 V |
| Supply voltage, permissible range, upper limit (DC) | 28.8 V |
| Input characteristic curve in accordance with IEC 61131, type 1 | Yes |
| Input current from load voltage L+ (without load), max. | 4 mA; per channel |
| Power loss, typ. | 2.5 W |
| IP degree of protection | IP20 |
Applications
- 24 V DC digital signal acquisition: For connecting 24 V DC digital input signals to a controller.
Frequently Asked Questions
What is the exact Siemens model of this digital input module?
The exact model is 6AG1221-1BH32-4XB0.
How many digital inputs does 6AG1221-1BH32-4XB0 have and what signal voltage does it use?
It has 16 digital inputs and uses 24 V DC signals.
What is the permitted supply voltage range for 6AG1221-1BH32-4XB0?
The permitted supply voltage range is 20.4 V to 28.8 V DC.
What are the dimensions of the module?
Width 45 mm, height 100 mm, depth 75 mm.
