| Type | Nominal voltage (V) | Order No. | Voltage range (V) | Nominal current (mA) |
| BU1 | 12 V DC | B100 510 004 | 6 - 15 | 300 |
| 24 V DC | B100 510 005 | 12 - 28 |
| Type | Nominal voltage (V) | Order No. | Voltage range (V) | Nominal current (mA) |
| BU1 | 12 V DC | B100 510 004 | 6 - 15 | 300 |
| 24 V DC | B100 510 005 | 12 - 28 |