Modbus RTU options are available for all CT Digistart soft starters.
- The Modbus RTU Module for Digistart D1/D2 clips onto the side of the soft starter.
- The Modbus RTU Card for Digistart D4/D5 slots inside the soft starter from the top.
| Description | File Size | Date |
| 710-21374-00A Modbus RTU Module for Digistart D1/D2 | 320 kb | 14 November 2019 |
| 710-19619-00B Modbus RTU Card for Digistart D4/D5 | 474 kb | 3 August 2021 |