Twisted Pair Cable Or Shielded Cable Usb To Serial Converters , EIA Standard

Twisted-pair Cable or Shielded Cable USB Serial Cable Converter , EIA Standard

Specifications:

Connector and signal

RS-485/RS-422 output signals and PIN assignment

UT-820E is a universal USB/RS-485/422 converter. UT-820E has a built-in photo electrical isolator and DC/DC isolation module without external power supply needed. Compatible with USB, RS-422 and RS-485 standards, UT-820E is capable to perform the conversion from single-ended USB signal into balanced differential signal of RS-422 or RS-485. The built-in photoelectric isolator can provide an isolation voltage of as high as 2,500Vrms. Quick state-of-the-art transient voltage suppressor (TVS) and discharge tube are adopted to protect the RS-422/485 interfaces. Under normal conditions, the TVS tube is in the state of high resistance. However, when both ends of the TVS tube are hit by a transient high energy, the impedance at both ends can be depressed by the TVS at a very high speed, and after absorbing a high current, the voltage between the two ends is suppressed and kept at a pre-set value, therefore no damage is caused to the electrical components behind by the transient high voltage impact.

The protector can effectively restrain lightning or ESD (electro static discharge) with a protection voltage of 1,500W on each line for lightning surge and surge voltage or transient over voltage possibly caused up by various reasons, and at the same time, a high-speed transmission of RS-422/ 485 interfaces is ensured by the tiny capacitance between the poles. RJ45 and DB9 male connectors are used for connection from RS-422/485 to other equipments. The unique I/O circuit of the internal zero-delay auto transceiver contained in the converter controls the data stream direction automatically without any handshaking signal (for example RTS, DTR etc). The converter is plug & play without any jumper settings needed for mode shift between full-duplex (RS-422) and half-duplex (RS-485). All these features ensure a universal application on all the existing communication software and hardware interfaces.

A reliable and stable point-to-point and point-to-multipoint communication can be ensured by UT-820E photoelectric isolation interface converter. For point-to-multipoint communication, as many as 128 interface facilities of RS-422 or RS-485 standard can be connected to each converter, and a high data transmission rate of 300-128000bps can be achieved. Power indicator light and data traffic indicator light are also available with the converter for malfunction indication. Conversions from USB to RS-422 and USB to RS-485 are supported.