USB4485 User Manual
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1. Introduction
A quick and easy way to expand your PC's port count and to adapt serial devices to your USB
PC. Edge port USB-to-Serial converters are intelligent expansion units that connect to a PC,
thin client or server via a USB port. USB4485 provides four RS-485/422 serial ports, is
compliant with USB 1.1 and 2.0 specifications, and meet the 480 Mbps high-speed
requirement of Hi-Speed USB 2.0. Using your computer’s USB ports to connect serial
devices reduces the total cost of ownership, investment in hardware, and long term
management and integration costs.
2. Packing List
USB4485 product is shipped with the following items:
◎ USB4485
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1
◎ 5VDC power adapter
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1
◎ CD for software
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1
◎ User manual
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1
3. Features
◎ USB to 4-port RS-485/422 converters
◎ Single chip(ASIC) USB port to serial port communication
◎ Support Windows98/ME and Windows2000/XP,Windows Server 2003/2008, Windows
7/Vista
◎ Support Linux, Mac
◎ Support powered from USB or 5VDC external power input
◎ No IRQ, I/O Address
◎ Support USB2.0, baud rate can reach up to 12Mbps
◎ 15KV ESD protection
4. Specifications
USB
Compliance: USB1.1/2.0 compliant
USB signal: VCC, DATA+, DATA-, GND, FG
Speed: 480Mbps (high-speed), 12Mbps (full-speed)
Connector for External Antenna: USB type B female
RS-485/422
Standards: RS-485, RS-422
Number of Ports: 4
Connectors: DB9 male
RS-422 signal: TX+(A), TX-(B), RX+(A), RX-(B),GND
RS-485 signal: D+(A), D-(B),GND
Working mode: Asynchronous, point to point, 2 wires half duplex, 4 wires full duplex
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