User Manual
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Table 3 IO modbus address
2.4. Power supply
The USR-M100 I/O gateway provides 2-pin power supply input terminal. The power supply support anti-reverse protection. Power
supply range: 9~36VDC.
2.5. Ethernet RJ45 interface
The 10Base-T/100Base-TX adaptive Ethernet RJ45 interface supports automatic MDI/MDIX connection, refer to Fig.7 below for the pin
distribution of the RJ45 interface.
Link LED: green color. Lights(steady on) when the module is connected to a network.
Activity LED: orange color. Blinks when network data is transmitted through the port.
Fig. 7 RJ45 with light
Table 4 Ethernet pin assignments
2.6. LED indicators
The USR-M100 smart RTU provides LED indicators to monitor the device working status with a comprehensive simplified
troubleshooting, the LED indicator behaviors are defined below.