Hexin Technology HXSP-2108G USB 2.0 To RS-485/RS-422 Converter - Manual (Page 4)

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IV. Features
● USB port to serial port signal conversion.
● Regular voltage range of RS-485 port:-7V~+12V
● Support Windows98/ME and Windows2000/XP
● Support MAC Apple and Linux v5.0
● Compatible with USB v1.1 and USB CDC V1.1
● USB full-speed transmission
● USB bus self powered
● Support auto-handshaking agreement
● Transmission speed up to 57.6kbps in the distance of 1200m
● RS485-422 standard of TIA/EIA
● Support remote waking up and power management
● Support communication of multiple ends up to 32 RS485-422 equipment
TIPS
The transmission speed of USB to RS485-422 is decided by the distance.
The longer the distance, the lower the speed rate would be. (Table)
Distance 0~10m 300m 1200m 5000m
Rate (Max) 230kbps 115kbps 57.6kbps 9600bps
V. PIN OUT
RS485/RSRS422（DB9M pin）
DB9M 1 2 3 4 5 6 7 8 9
RS485-422 T-/D- T+/D+ R+ R- GND
VI. System requirement
 Intel CPU compatible 486DX4-100 MHz or higher
 One standard USB interface (4-pin)
 Windows 98/Me or Windows 2000/XP operating system
VII. Driver installation
1) Put in drive disk
2) Find Pcomm26 folder, and run [Setup]