| Red | Live (9-32v DC) | |
| Black | Neutral (0v DC) | |
| Pink | RS-232 RX | |
| Blue | RS-232 TX | |
| Yellow | Channel 0 - Digital input | Pull to 0v for ‘LOW’, leave floating for ‘HIGH’ (dry contact - 300uA wetting current) |
| Green | Channel 1 - Digital input | Pull to 0v for ‘LOW’, leave floating for ‘HIGH’ (dry contact - 300uA wetting current) |
| Grey | Channel 2 | When configured for input, pull to 0v for ‘LOW’, leave floating for ‘HIGH’. When configured for output, operates as an open drain. 1 open drain output (Max 30V open, 100mA closed) |
| White | Channel 3 - Analogue input | Impedance: 620kohm in voltage mode, 100ohm in current mode |