Low-cost standard USB to RS422 / RS485 adapter suitable for most older operating systems and applications, including industrial, commercial and any general office computer device.
This is a bi-directional, (meaning it communicates in both directions), basic and cost-effective converter that lets you connect any RS422 or RS485 device directly to your computer's USB port, efficiently converting USB signals to half-duplex RS485 signals and full-duplex RS422 signals and vice versa.
It is build around the PL-2303HX processor chip from Profilic which is a good all-round processor for general use with most older operating systems, however not recommended for complex systems and applications.
This USB to RS422 / RS485 adapter is powered from the USB port so no external power supply is needed. The RS422 / RS485 end is a standard 9-pin D-sub connector with a optional screw terminal board included for easy connection of cables or single wires.
Automatic send data control is enabled by default so no external flow or handshake control is needed.
Drivers for this USB to RS422 / RS485 adapter are fully compatible with Windows 98Se, ME, 2000, XP, Server 2003, Mac and older versions of Linux but has only limited compatibility with Windows 7 and Vista, (our Pro USB to RS422 / RS485 adapter is optimized and fully compatible with Windows Vista and Windows 7 and 8).
- Best for only older operating systems
- Low-cost solution
- USB port powered USB to RS485 converter
- Terminal board included with each converter
- Hexagonal nut stand-offs for connecting thumbscrews
- Processor: Prolific PL2303HX
- Windows 98, ME, 2000, XP32, Server 2003
Since this is a low-cost adapter it has limited compatibility and is not recommended for Windows Vista, Windows 7 and it will not work with Windows 8
- Mac OS X 8, 9, 10, 10.6
- Windows CE 5.0
|RS485 / RS422 Interface
||DB9 Male / included screw terminal header
||Standard Type A Male
||- RS485: D+, D-, GND
- RS422: TX+, RX-, TX+, RX-, GND
|Power on pin 9
||300bps to 115200bps
|| None, Odd, Even, Mark, Space
||5, 6, 7 or 8
||One, one and a half, or two stop bits
|TX / RX buffer size
||Configurable 512-byte bi-directional data buffer
- 256-byte outbound buffer and 256-byte inbound buffer; or
- 128-byte outbound buffer and 384-byte inbound buffer
|Adjustable USB transfer sizes for TX and RX
||From 64 bytes to 4096 bytes
||None, Xon/Xoff, Hardware
|COM port accessible by
||Included virtual COM port drivers
|Electrostatic (ESD) protection
||600W surge protection, 15KV static electricity protection
||less than 100mA
||USB1.1,2.0,3.0, EIA/TIA RS-232
||FCC, CE and RoHS
||-20°C to 60°C
||1 year limited warranty
For alternative USB to serial RS485 and RS422 solutions please see our full selection of USB to Serial RS485 converters