Product Description
Key Features
- Digital input configuration: SM 1221, DI 16×24 V DC; 16 digital inputs in groups of 4.
- Supply and input voltage: Rated supply voltage: 24 V DC, permissible range 20.4 V to 28.8 V. Rated input voltage: 24 V DC.
- Product identity: SIPLUS S7-1200 module based on 6ES7221-1BH32-0XB0.
- Environmental protection: Conformal coating; IP20 degree of protection; operating ambient temperature from -20 °C to 60 °C.
- Installation and connection: Required front connector; width 45 mm, height 100 mm, depth 75 mm; weight approx. 210 g.
- Lifecycle status: Active Product.
Technical Summary
| Product type designation | SM 1221, DI 16×24 V DC |
|---|---|
| Digital inputs | 16; in groups of 4 |
| Rated supply voltage | 24 V DC |
| Permissible supply voltage range | 20.4 V to 28.8 V DC |
| Input voltage for signal "0" | 5 V DC at 1 mA |
| Input voltage for signal "1" | 15 V DC at 2.5 mA |
| Operating ambient temperature | -20 °C to 60 °C; cold restart minimum 0 °C |
| IP degree of protection | IP20 |
| Required front connector | Yes |
| Product lifecycle | Active Product |
Frequently Asked Questions
What exact Siemens model should be confirmed for this digital input module?
Confirm Siemens 6AG1221-1BH32-4XB0, SIPLUS S7-1200 SM 1221, DI 16×24 V DC, based on 6ES7221-1BH32-0XB0.
What supply voltage does the module use?
The rated supply voltage is 24 V DC, with a permissible range of 20.4 V to 28.8 V DC.
How many digital inputs are provided?
It has 16 digital inputs arranged in groups of 4.
What operating temperature is specified?
The ambient operating temperature is -20 °C to 60 °C; cold restart has a minimum of 0 °C.
