Product Description
Key Features
- Exact product identity: SIMATIC S7-1200 G2 SB 1221 digital input; product type designation: SB 1221, DI 8x 24 V DC 100 kHz.
- Digital input capacity: 8 digital inputs, sink/source, arranged in groups of 8.
- Input voltage and current: Rated input voltage: 24 V DC. Signal 0: 5 V DC or 0.5 mA; signal 1: 15 V DC at 2.5 mA.
- High-speed input performance: Input frequency: 100 kHz. Shielded cable length: max. 500 m; 50 m shielded for HSC inputs. Unshielded cable length: max. 300 m.
- Configuration and diagnostics: Configurable/integrated with STEP 7 TIA Portal V20 or higher. Diagnostics function and DIAG LED are available; diagnostic alarm is not available.
Applications
- Digital signal input: Accepts 8 digital 24 V DC sink/source signals.
- Technological functions: Technological functions are parameterizable.
- Interrupt inputs: Interrupt inputs are parameterizable.
Technical Summary
| Product type designation | SB 1221, DI 8x 24 V DC 100 kHz |
|---|---|
| Product lifecycle | Active Product |
| Number of digital inputs | 8; sink / source |
| Rated input voltage (DC) | 24 V |
| Input frequency | 100 kHz |
| Signal 0 input voltage | 5 V DC or 0.5 mA |
| Signal 1 input voltage | 15 V DC at 2.5 mA |
| STEP 7 TIA Portal version | V20 or higher |
| Input current from backplane bus | 5 V DC, typ. 108 mA |
| Power loss | Typ. 2.4 W |
| IP degree of protection | IP20 |
Frequently Asked Questions
What order number should be confirmed for this SB 1221 input module?
Confirm Siemens order number 6ES7221-3BF50-0XB0 and product type SB 1221, DI 8x 24 V DC 100 kHz.
How many digital inputs does the module have?
It has 8 digital inputs with sink/source operation, arranged in groups of 8.
What voltage and signal levels does it use?
The rated input voltage is 24 V DC. Signal 0 is 5 V DC or 0.5 mA, and signal 1 is 15 V DC at 2.5 mA.
Which STEP 7 TIA Portal version is required?
It is configurable/integrated with STEP 7 TIA Portal V20 or higher.
What configuration details should be confirmed for an inquiry?
Confirm the installed order number, required quantity, destination, and preferred condition.
