Multi-master shared serial port server and MODBUS TCP/RTU gateway. Realize up to 96 masters to monitor a slave station serial device or multiple slave station serial devices on a serial bus simultaneously in real time without changing the existing communication protocols and software; These masters can be multiple computers, touch panels, PLC masters, etc.; Supports protocol-free transparent transmission and MODBUS TCP/RTU gateway; Industrial grade design; Network interface-serial interface-power interface completely isolated; Working temperature: -40℃-+85℃; DIN35 standard lead rail mounting.