Extensible RS485 repeater hub. Applicable for a variety of communication networks with RS485 physical interfaces, such as MODBUS; A single device can be used as a repeater, and multiple devices (N pcs) can form a 2N-port hub; Communication rate: 0-500kbps, self-adaptive; Support redundant power supply; Realize RS485 bus, star and hybrid network topologies to facilitate network cabling; Transparent data transmission without delay; Bi-directional extended communication distance in line with the RS485 standard; With communication indicator; 9-40VDC wide voltage isolated power supply; Power supply-RS485-RS485 completely isolated; Lightning and surge protection; Interface: terminal block in accordance with the RS485 standard;  DIN35 standard lead rail mounting.