Robustel R5020 User Guide
RT_UG_R5020_v.1.0.2 Mar. 17, 2023 26/167
2.13 DI/DO Interface
The R5020 supports 1 channel DI and 1 channel DO by default. It can support 2 channels of DI or 2 channels of DO by
BOM modification. DI signal access, can be used for NPN/PNP type sensor signal or switch signal acquisition, power
supply can only be accessed from IN, not reversed. DO signal output, can be used for NPN/PNP sensor control.
1. Application mode of DI connected with NPN sensor
IN corresponds to IN on 2*5 3.5mm interface, and IGND corresponds to IGND on 2*5 3.5mm interface. The voltage
range of external power supply (DC) is 3V ~ 30V. The internal flow of the device is limited. In the normal voltage
range, the external power supply does not need to be limited.
Notes: The above example NPN Sensor is a DC three-wire NPN photoelectric switch or proximity switch.