| DIO board | Feature | Terminal mark | Terminal function description | Electrical specification |
| Input/output | Extended input/output signal interface | IN5 | Extended input 5 | Input point mode:DC Input voltage:24VDC Input current:5mA |
| IN6 | Extended input 6 |
| IN7 | Extended input 7 |
| IN8 | Extended input 8 |
| COM3 | Extended input 5~8 Com |
| OUT5 | Extended output 5 | Input point mode:DC Current:2A/1point Voltage:250VAC,30VDC Maximum load:10W | Input point mode:transistor Current:0.2A/1point Voltage:30VDC Maximum load:10W |
| OUT6 | Extended output 6 |
| OUT7 | Extended output 7 |
| OUT8 | Extended output 8 |
| COM4 | Extended output 5~8 Com |