The BMS Module is an industrial 8-channel module with relays controlled by TCP/IP protocol with transparent Modbus communication mode. The whole unit is enclosed in an aesthetic ABS housing compatible with DIN rail. Module can be connected to an external high-current AC contactor and relay. It deliveres reliable communication. Automatic IP address acquisition is supported and support of 10 TCP client connections under TCP server is delivered. With the supplied configuration software, 5 operation modes can be configured: TCP server, TCP client, UDP server, UDP client, DNS domain name. It has RS485 and Ethernet port. It has 8 programmable relays, 8 inputs. The function of saving when the power is off (saving the relay status). The product can withstand high temperature and work in the range of -40 ℃ to + 85 ℃.