| Manufacturer part number (MPN) | 6ES7221-3BF50-0XB0 |
| EAN / GTIN | 4047623417187 |
| Sales unit | pcs |
| Number of digital inputs | 8 |
| Digital inputs configurable | Yes |
| Digital outputs configurable | Yes |
| Input current at signal 1 | 6 mA |
| Permitted voltage at input | 0–30 V |
| Type of voltage (input voltage) | DC |
| Redundancy | No |
| Type of electric connection | Spring clamp connection |
| Time delay at signal change | 0.1–20 ms |
| Suitable for safety functions | No |
| Appendant operation agent (Ex ia) | No |
| Explosion safety category for gas | ATEX gas-ex-protection, Cat. 3G |
| Explosion safety category for dust | None |
| Width | 15 mm |
| Height | 62 mm |
| Depth | 63 mm |
| Country of origin | China |