Technical Summary
| Product type designation | SM 1221, DI 16×24 V DC |
|---|---|
| Number of digital inputs | 16 |
| Rated value (DC) | 24 V |
| Permissible range, lower limit (DC) | 20.4 V |
| Permissible range, upper limit (DC) | 28.8 V |
| Input current from backplane bus 5 V DC, max. | 130 mA |
| Digital inputs from load voltage L+ (without load), max. | 4 mA; per channel |
| Input voltage for signal "0" | 5 V DC at 1 mA |
| Input voltage for signal "1" | 15 V DC at 2.5 mA |
| Diagnostic alarm | Yes |
| Degree of protection | IP20 |
Applications
24 V DC digital input acquisition
For connecting 24 V DC digital input signals to a SIMATIC S7-1200 controller.
Key Features
16 digital inputs
Digital input module with 16 DI.
24 V DC input rating
Rated value (DC): 24 V.
IEC 61131 type 1 input characteristic
Input characteristic curve in accordance with IEC 61131, type 1.
Diagnostic alarm
Diagnostic alarm: Yes.
IP20 protection
Degree of protection: IP20.
Active Product lifecycle
Product lifecycle: Active Product.
Frequently Asked Questions
What is Siemens 6ES7221-1BH32-0XB0?
It is a SIMATIC S7-1200 digital input SM 1221 module, SM 1221, DI 16×24 V DC.
How many digital inputs does 6ES7221-1BH32-0XB0 have?
It has 16 digital inputs.
What is the rated DC voltage for 6ES7221-1BH32-0XB0?
Rated value (DC): 24 V. The permissible range is 20.4 V to 28.8 V.
What protection rating is listed for 6ES7221-1BH32-0XB0?
Degree of protection: IP20.
