Digital input
Nominal input: 24V ± 10%.

Pin  | Signal Name  | Dir  | Description  | 
|---|---|---|---|
1  | 24V_OUT  | Power out  | |
2  | 24V_OUT  | Power out  | For pin 1-5: Maximum cable length 3 m. The I/O IN connector includes a low current 24 V / max 50 mA output intended to drive the opto couplers, which are sinking 24 V inputs.  | 
3  | GND_GND  | Power out  | |
4  | GND_GND  | Power out  | |
5  | GND_GND  | Power out  | |
6  | DIG_IN_GND  | Input Gnd  | Common Input Gnd.  | 
7  | DIG_IN1  | Input  | Sinking input.  | 
8  | DIG_IN2  | Input  | Sinking input.  | 
9  | DIG_IN3  | Input  | Sinking input.  | 
10  | DIG_IN4  | Input  | Sinking input.  |