Industrial Cellular VPN Router NR500 Series User Manual
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Appendix C -Digital IO Scenario
Digital Input
Typical Application Diagram
DI1
DI2
GND
TX
RX
1
2
3
4
5
V+
V-
PGND
1
2
3
DI ELECTRICAL CHARACTERISTICS
1、galvanic isolation;
2、Over-Voltage Protection: 36 VDC
3、Over-Current Protection:100mA per channel @ 25°C
Dry Contact Typical Application
Switch ON(Short to V-): DI Logic LOW
Switch OFF(Open): DI Logic HIGH
Switch1 Switch2
Digital Output
Typical Application Diagram
B
6
7
8
9
10
DO1
DO2
COM
A
V+
V-
PGND
1
2
3
DO ELECTRICAL CHARACTERISTICS
1、galvanic isolation;
2、Over-Voltage Protection: 36 VDC
Wet Contact Typical Application
DO Logic LOW: Switch ON(Led ON)
DO Logic HIGH: Switch OFF(Led OFF)