Key Features
- SM 1221 digital input module: SIMATIC S7-1200 G2 SM 1221 digital input module for 16 DI.
- 24 V DC sink/source inputs: Inputs: 16x DI 24 V DC sink/source.
- Diagnostics functions: Diagnostics function: Yes. Diagnostics indication LED for status of the inputs: Yes. Diagnostics indication LED for maintenance: Yes.
Technical Summary
| Product type designation | SM 1221, DI 16x 24 V DC |
|---|---|
| Number of digital inputs | 16 |
| Input voltage, rated value (DC) | 24 V |
| Input voltage for signal "0" | 5 V DC or 0.5 mA |
| Input voltage for signal "1" | 15 V DC at 2.5 mA |
| Input current from backplane bus 5 V DC, max. | 90 mA |
| Power loss, typ. | 3.2 W |
| Potential separation digital inputs between the channels and backplane bus | Yes; 707 V DC (type test) |
| IP degree of protection | IP20 |
| Product lifecycle | Active Product |
Applications
- 24 V DC digital signal input: Collecting 24 V DC sink/source digital input signals through 16 DI channels.
Frequently Asked Questions
What is Siemens 6ES7221-1BH50-0XB0?
It is a SIMATIC S7-1200 G2 SM 1221 digital input module.
How many digital inputs does 6ES7221-1BH50-0XB0 have?
It has 16 digital inputs.
What input voltage does the 6ES7221-1BH50-0XB0 use?
Rated input voltage is 24 V DC.
What are the signal levels for 6ES7221-1BH50-0XB0 digital inputs?
Signal "0" is 5 V DC or 0.5 mA, and signal "1" is 15 V DC at 2.5 mA.
