HEUS-T-035 is an USB to RS-485/422 converter with no external power supply, built-in photoelectric isolator and DC/DC power isolation module. Compatible with USB, RS-422, RS-485 standards, it can convert single-ended USB signals to balanced differential RS-422 or RS-485 signals with built-in photoelectric isolator, capable of providing isolation voltages up to 2,500 Vrms, with fast transient voltage suppression protector, which is designed to protect RS-485/422 interfaces, using today's advanced TVS (TRANSIENT VOLTAGE SUPPRESSOR). Under normal conditions TVS tube is a high resistance state, when the two ends of the TVS tube is subjected to an instantaneous high-energy shock, it can reduce the impedance of the two ends at a very high rate, absorbing a large current, thus clamping the voltage at its two ends at a predetermined value to protect the back circuit components from damage due to transient high-voltage shock. This protector effectively suppresses lightning and ESD, providing 600W per wire of lightning strike, surge voltage and transient over-voltage from various causes on the wire, and the extremely small inter-pole capacitance ensures high speed transmission of the RS-485/422 interface, with the RS-485 and RS-422 ends connected via DB9 male connectors. The converter is equipped with zero delay automatic transceiver, unique I/O circuit automatically controls the data flow direction without any handshaking signal (such as RTS, DTR, etc.). No jumper setting is required to achieve full-duplex (RS-422) and half-duplex (RS-485) mode conversion, plug-and-play. Ensure that all existing communication software and interface hardware are suitable.
HEUS-T-035 photoelectric-isolated interface converter can provide reliable connection for point-to-point and point-to-multipoint communication, each port of point-to-multipoint can allow connection of 128 RS-422 or RS-485 interface devices, data communication rate 300-128,000 bps, with power indicator and data flow indicator to indicate the fault.