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 current from backplane bus 5 V DC, max. | 130 mA |
| Input characteristic curve in accordance with IEC 61131, type 1 | Yes |
| Conformal coating | Yes; Class 2 for high reliability |
| Ambient temperature during operation | -20 °C; = Tmin (incl. condensation/frost); start-up @ 0 °C |
| IP degree of protection | IP20 |
Key Features
16 DI digital input module
Product type designation: SM 1221, DI 16×24 V DC.
Product type designation: SM 1221, DI 16×24 V DC.
SIPLUS version with conformal coating
Based on 6ES7221-1BH32-0XB0 with conformal coating.
Based on 6ES7221-1BH32-0XB0 with conformal coating.
24 V DC input rating
Rated value (DC): 24 V; permissible range: 20.4 V to 28.8 V.
Rated value (DC): 24 V; permissible range: 20.4 V to 28.8 V.
Sink/source input behavior
16 DI, 24 V DC, sink/source.
16 DI, 24 V DC, sink/source.
Temperature range
Ambient temperature during operation: -20 °C to 60 °C; start-up @ 0 °C.
Ambient temperature during operation: -20 °C to 60 °C; start-up @ 0 °C.
Applications
16-channel digital input signal acquisition
For connecting 24 V DC digital input signals to 16 DI.
For connecting 24 V DC digital input signals to 16 DI.
Frequently Asked Questions
What is Siemens 6AG1221-1BH32-4XB0 in the SIPLUS S7-1200 range?
It is a SIPLUS S7-1200 SM 1221 digital input module.
How many digital inputs does 6AG1221-1BH32-4XB0 provide?
It provides 16 digital inputs.
What input voltage does 6AG1221-1BH32-4XB0 use?
The rated input voltage is 24 V DC, with a permissible range of 20.4 V to 28.8 V.
Does 6AG1221-1BH32-4XB0 have conformal coating?
Yes, it is supplied with conformal coating.
