Specifications

+/-1.5KV ESD protected usb to rs485 converter
master chip from TaiWan
USB2.0 version, plug&play
with CE/RoHS/FCC approval

+/-1.5KV ESD protected usb to rs485 converter details:

 

With rapid development of computer industry, USB is taking the place ofvarious kinds of traditional low speed peripheral interfaces. However, RS-485422 interface designs are still used in many of the important facilities under current industrial environment; therefore, converter is used by many users to implement the data transmission from USB of a computer to RS-485422 equipment.

HighTek HU-03 is a universal USB to RS-485422 interface converter. No external power supply needed. Compatible with USB and RS-485422 standards, HU-03 is capable to perform the conversion from single-ended USB signal into UART signal of RS-485422. DB9 male connectors are used for connection from RS-422485 interface. The unique I/O circuit of the internal zero delay auto transceiver contained in the converter controls the data stream direction automatically.

The converter is plug-and-play. All these features ensure a universal application on all the existing communication software and hardware interfaces.

The data communication rate can be as high as 300-921.6Kbps by the point-to-point communication by HU-03 interface. Power indicator light and data traffic indicator light are also available with the converter for malfunction indication. Conversion from USB to RS-485422 is supported.

 

Functions

HU-03 interface converter supports the following communication mode:

1. Point-to-point communication mode.

 

Hardware installment and application

Read the user manual carefully before installing the HU-03 interface converter. Put the signal cable of the equipment into the USB socket.

USB/DB9 male connectors are adopted for input/output interface connection for this product.

 

Performance parameters

1. Standards: conforming to USBV1.1 and 1.0, EIA RS-485 and RS-422, backwards compatible.

2. USB signals: VCC DATA+ DATA- GND FG

3. RS-485 signals: T+, T-, GND.

4. RS-422 signals: T+, T-, R+, R-, GND.

5. Working modes: asynchronous, point-to-point or point-to-multipoint, 2-line half duplex and 4-line full duplex.

6. Direction control: adoption of automatic data stream control for automatic recognition and control of data transmission direction.

7. Baud rate: 300-128,000bps, automatic detection of the transmission rate of the serial interface signal.

8. Workload ability: point-to-multipoint supported, a maximum of 32 RS-422 or RS-485 interface equipments are supported.

9. Transmission distance: 1200 meters for RS-485/422 end (when 9,600bps) and a maximum of 5 meters for USB.

10. Signal indication: 3 indicator lights for Power (PWR), Send (TXD) and Receive (RXD).

11. Transmission media: twisted-pair cable or shielded cable.

12. Transmission rate: 128,000bps to 300M.

                                          38,400bps to 600M.

                                          9,600bps to 1200M.

13. Dimensions: 1555mm 36mm 16mm.

14.Working environment: -25 to 70 , relative humidity5% to 95%.

15. Transmission distance: 0-1200meters (128,000bps-9,600bps)

16. Windows95/98/2000/XP/Vista/Win7/Linux and IMAG are supported.

 

Connector and signal

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

2. USB-B female: USB output signals and PIN assignment

Communication Connection Chart

1-      Standard USB A type male connector

2-      Filter magnetic pole

3-      Transparent and shielded standard 2.0 communication line

4-      Fine shell(blue)

5-      Standard DB9 male connector

6-      MCU adopts the product of the TaiWan chip

 

Problems and troubleshooting

1. Data communication failure

A. Check to make sure USB cable is OK.

B. Make sure RS-485422 output interface connection is correct.

C. Make sure power supply is OK.

D. Make sure the wire terminal connection is OK.

E. Make sure the indicator lights flash when receiving.

F. Make sure the indicator lights flash when sending.

2. Data missing or incorrect

A. Check to see whether the data rate and format at both ends of the communication equipment are consistent.