1. Applicable models
This note is applicable to ME31-AXAX0404, ME31-AAAX2240, ME31-XAAX0440, ME31-XAXA0404 and other network IO devices.
2. Function description
2.1 RS-485 cascade expansion
ME31 series network IO supports connecting to RTU devices through the serial port to expand industrial IoT terminals the number and types of IO, such as connecting MA01-XXCX0080 to expand 8-way relay output, connecting to MA01-AXCX4040 to expand 4-way switch value acquisition, which can realize access to the user's own RTU node through the Ethernet interface .
3. Functional application introduction
ME31-XAXA0404 (Modbus addr: 1) uses RS-485 bus to connect MA01-AXCX4040 (Modbus addr: 10) Bluetooth Module and MA01-AACX0440 (Modbus addr: 11), to achieve 8-way switch control, 2-way digital acquisition, 2-way Analog acquisition expansion;