| Category | Model No. | Description | Suitable for |
| IO Card | MD38IO1 | I/O extension card 1, provides: 5x DI, 1x AI, 1x relay output, 1x DO, 1x AO, Modbus-RTU and CANlink. | Frame sizes T4-T12 |
| MD38IO2 | I/O extension card 2, provides 3x extra DI terminals. | All | |
| MD38IO3 | I/O extension card 3, provides 3x DI, 1x relay output, Modbus-RTU. RS485 port | All |
3 Year NZ Warranty