Modbus rtu 8-way relay with local button switch 485 serial relay module
Power requirements: DC9-35V, inside and outside the negative PCB size: length 122mm X width 86mm Functional Description:
Through the 485 control 8-way relay pull, release, support 1-255 seconds delay, jog, 8-way local button can be configured for self-locking, follow, jog or digital acquisition mode, with 485 communication indicator, industrial Chip-plus lightning protection circuit to ensure stable operation of the module. The ModBus RTU protocol supports the 01, 02, 03, 05, 06, 15 and 16 commands, allowing you to flexibly select different commands to access the relay and input status. Provide 485 configuration tool to modify the module address, and can use the jumper lock module configuration to prevent misplaced, with configuration tool source code (through the DLL call to achieve). To provide C # host computer program, presented C # host computer source code, select the relay in the graphical interface and acquisition instructions, you can directly read the 485 to send the optimized ModBus command; instructions sent after the return code. You do not need to understand the ModBus protocol, nor do you need to refer to the module instruction table to minimize the difficulty of secondary development. Recommended LIBMODBUS with the module for ModBus application development, presented LIBMODBUS source files, VC2008 can be successfully compiled for the DLL, and another VC6.0 call LIBMODBUS DLL instance.
Module structure diagram:
Industrial chip with lightning protection circuit Onboard 8-way relay with absorption diode circuit, each LED indicator, light relay relay The 8-way local button can be configured for self-locking, follow, jog or digital acquisition modes With a road power indicator, 485 communication indicator Through the 485 configuration module address, jumper lock module configuration to prevent misplaced, with configuration tool source code 1.6mm thick PCB made of military grade FR-4 plate, PCB size 122mm X 86mm, reserved for mounting holes ModBus RTU protocol supports 01,02,03,05,06,15 and 16 commands, can be used flexibly Supports ModBus Poll