Technical Summary
| Product type designation | SM 1221, DI 16×24 V DC |
|---|---|
| Based on | 6ES7221-1BH32-0XB0 |
| Number of digital inputs | 16 |
| 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 |
| Power loss, typ. | 2.5 W |
| Input characteristic curve in accordance with IEC 61131, type 1 | Yes |
| Input voltage for signal "0" | 5 V DC at 1 mA |
| Input voltage for signal "1" | 15 V DC at 2.5 mA |
| Operating temperature | -40 °C; = Tmin (incl. condensation/frost); start-up @ -25 °C |
Key Features
SIPLUS S7-1200 SM 1221 module
Digital input module for the SIMATIC S7-1200 family.
Digital input module for the SIMATIC S7-1200 family.
16 digital inputs
Product type designation: SM 1221, DI 16×24 V DC.
Product type designation: SM 1221, DI 16×24 V DC.
24 V DC input ratings
Rated value (DC): 24 V. Input voltage for signal "0": 5 V DC at 1 mA. Input voltage for signal "1": 15 V DC at 2.5 mA.
Rated value (DC): 24 V. Input voltage for signal "0": 5 V DC at 1 mA. Input voltage for signal "1": 15 V DC at 2.5 mA.
Conformal coating
Designed with conformal coating for industrial process technology use.
Designed with conformal coating for industrial process technology use.
Temperature range
-40…+70 °C operating temperature, with start up -25 °C.
-40…+70 °C operating temperature, with start up -25 °C.
Front connector required
Connection method requires a front connector.
Connection method requires a front connector.
Applications
24 V DC digital signal input
Connection of 16 x 24 V DC digital input signals to a SIMATIC S7-1200 station.
Connection of 16 x 24 V DC digital input signals to a SIMATIC S7-1200 station.
Frequently Asked Questions
What is Siemens 6AG1221-1BH32-2XB0?
It is a SIPLUS S7-1200 SM 1221 digital input module with 16 DI.
How many digital inputs does 6AG1221-1BH32-2XB0 have?
It has 16 digital inputs.
What are the supply voltage limits for 6AG1221-1BH32-2XB0?
The rated value is 24 V DC, with a permissible range from 20.4 V DC to 28.8 V DC.
Does 6AG1221-1BH32-2XB0 require a front connector?
Yes, a front connector is required.
