As the common serial communication port, RS485 interface is widely used in various industrial equipment. With the development of the Internet of Things and the demand for equipment remote monitoring, a single RS485 interface can no longer meet different monitoring demands. SmartGen has developed one RS485 interface expansion module SG485-3 to meet the product market demand.
Main Functions
1.MODBUS RTU communication protocol;
2.DC 8~35V supply;
3.Guide rail installation;
4.1 RS485 interface is expanded to 2 RS485 interfaces;
5.Power, communication status LED indication;
6.Built-in 120Ω matching resistor;
7.8-digit dial switch can set master and slave communication address.
Communication Connection Diagram
Terminal and Communication Address Setting
MODBUS Tips
1.MODBUS is an international communication protocol for exchanging data between equipment of different manufacturers;
2.MODBUS protocol has three modes: MODBUS RTU, MODBUS ASCII, MODBUS TCP;
3.The physical hardware interfaces of MODBUS RTU, MODBUS ASCII are serial communication ports (such as RS485, RS232, RS422);
4.The physical hardware interface of MODBUS TCP is EHTERNET interface.
