| Manufacturer part number (MPN) | 6ES7521-1BH50-0AA0 |
| EAN / GTIN | 4025515080251 |
| Sales unit | pcs |
| Voltage type (supply voltage) | DC |
| Number of digital inputs | 16 |
| Digital outputs configurable | Yes |
| Input current at signal 1 | 4.5 mA |
| Type of voltage (input voltage) | DC |
| Type of digital output | None |
| Short-circuit protection, outputs available | No |
| Type of electric connection | Plug-in connection |
| Explosion safety category for gas | ATEX gas-ex-protection, Cat. 3G |
| Explosion safety category for dust | None |
| Width | 35 mm |
| Height | 147 mm |
| Depth | 129 mm |
| Country of origin | Germany |