USB RS422 Converter / USB to RS422 Adapter

USB TO RS422 CONVERTER

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USB TO RS422 ADAPTER

USB RS422 Converter / Adapter

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USB to RS422 Converter / Adapter    

USB TO RS422 CONVERTER / ADAPTER

- Adds single/dual RS422 ports to USB.
- Great range of OS support (including
  Windows 7/Vista/XP, CE, Mac and Linux).
- Built-in 120
Ω end-of-line terminator.
- Plug-and-play.
- CE certified.
- 5-year manufacturer's warranty.
         
 

USB Serial Adapters

 

USB TO RS422 CONVERTER / USB TO RS422 ADAPTER

 

USB to Single RS232 Adapter

 
 

USB to Dual RS232 Adapter

 
 

USB to RS485 Converter

 
 

USB to dual RS485 Converter

 
 

USB to RS422 Converter

 
 

USB to dual RS422 Converter

 
 

USB to TTL Converter

 
 

USB to dual TTL Converter

 
 

USB to TTL 3.3V Converter

 
 

USB to dual TTL 3.3V Converter

 
     
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RS232 to RS422 Converters

 
 

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RS232 RS485 RS422 to TTL Converters

 
 

RS232 RS485 RS422 Repeaters

 
 

Fiber Optic Converters

 
 

RS232 Serial Analyzer

 
 
 

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Testimonials


"You have a great product.  Plugged it in and it worked right out of the box.., on the first try. Thanks for saving my old serial port devices in a world that thinks newer is better.  I am glad there are people like you who provide the compatibility that the industry doesn't care about anymore."

Chester

"I am communicating with kWh (energy) meters that have the RS485 built in, the port-powered converter's auto-turnaround feature works really well for my application, and I don't have to change any configuration."
Peter

 
 
   

         

INTRODUCTION (USB TO RS422 CONVERTER)

USB RS422 Converter
(Windows 7 supported!)
$94.95
$82.95
Order Here

This USB to RS422 converter / USB to RS485 converter is a port-powered bi-directional USB to RS422 / RS485 converter, which can be used to convert any standard full-duplex USB port into a four-wire RS485 / RS422 port or a 2-wire RS485 port and vice versa. The unit can be used to communicate with one loop of up to 128 units of RS422 / RS485 devices, and it comes with a built-in 120 Ohm terminator for easy installation.

The USB to RS422 converter / USB to RS485 converter is powered from the USB port and it supports data auto-sensing & self-adjusting, no baud rate setting is required. And with the data direction auto-turnaround technology, no external power or flow control is required for RS485 communications.

The USB to RS422 converter / USB to RS485 converter uses the latest FTDI chipset and is fully compatible with Windows 7/Vista/XP/Server2008/ Server2003/2000/98 (32-bit), Windows 7/Vista/XP/ Server2008/Server2003 (64-bit), Win CE, Mac, and Linux.

data sheet | download drivers | FAQs

FEATURES (USB TO RS422 CONVERTER)

-   Adds one 4-wire RS-422 / RS-485 (or 2-wire RS485) port to your USB port.
-   Communicate with one loop of up to 128 units of RS422 / RS485 devices.
-   Built-in 120Ω end-of-line terminator for easy installation.
-   Data direction auto-turnaround, no flow control is required.
-   Supports 300 to 115,200 baud (auto-sensing and self-adjusting)
-   Supports Windows 7/Vista/XP/Server2008/Server2003/2000/98 (32-bit), Windows 7/Vista/XP/Server2008/Server2003 (64-bit), Win CE, Mac, and Linux.
-   Supports remote wakeup and power management.
-   Plug and play (hot-pluggable, data format auto-sensing and self-adjusting).
-   Port-powered, no external power required.
-   No IRQs required, no IRQ conflicts.
-   CE certified.
-   5-year manufacturer's warranty.
 
 

SPECIFICATIONS  (USB TO RS422 CONVERTER / ADAPTER)

 
 

Part Number:

USB-232-1+CVT-485_422-1

Compatibility:

USB 2.0 (backward compatible) and EIA/TIA RS-485 / RS-422 standards

Power Source:

From USB port

Current Consumption: Less than 100mA

Baud Rates:

300 to 115,200bps (Auto-sensing & Self-adjusting)

Distances:

USB side: 10ft (3m); RS-485/RS-422 side: Depending on the power from USB port, will transmit up to 4000ft (1.2km) at 19,200bps

Connectors:

USB Side: Type A Female; RS-485/RS-422 Side: DB-9 Male; Termination Board: DB-9 Female and a 6-Way Terminal Block

Maximum number of drops:

128

End of Line Terminator:

120Ω (Built-in)

Dimensions (H x W x D):

0.63 x 1.3 x 5.5 in (16 x 32 x 140 mm) (excluding cable)

Cable Length: 3.3 ft (1 m)

Weight:

4.3 oz (123 g)

Operating Temperature:

32ºF to 95ºF (0ºC to 35ºC)

Operating Humidity:

Up to 90% RH (no condensation)

   
 

CONVERTER CONNECTOR / TERMINAL BLOCK PINOUTS

 
 

USB Side

USB to RS422 Converter - USB Connector  

USB Type A Connector (view from front)

RS485 / RS422 Side

Pin 1 2 3 4 5 6 7 8 4
Jumper J2
(default: ON)
J3
(default: ON)
  J1
(default: ON)
J4
(default: ON)
RS485 A+ (J2 ON) B- (J3 ON) GND (J1 ON) Terminate/remove Jumper J4
to turn ON/OFF the 120Ω
end-of-line terminator.
RS422 (J2 OFF) (J3 OFF) GND (J1 OFF)
TX+ RX+ TX- RX- GND
  USB to RS422 adapter - DB9 and Terminal Block pinoutsNote: The USB RS422 Converter comes with a 6-way terminal block (RS485/RS422 side) for easy wire connections. However, you may choose not to use the terminal block provided and simply follow the above table for pin assignments.
  DB-9 Male (view from front) / Terminal Block
   
 

JUMPER SETTINGS FOR RS485 / RS422 MODES AND 120 OHM END-OF-LINE TERMINATOR

 
  1) USB to RS485 Mode
  USB to RS422 Converter - RS485 Mode
- Turn ON Jumper 1, 2 & 3 for RS-485 mode;
- IMPORTANT: Turn ON J4 (120 Ohm End-Of-Line Terminator) at both ends of the RS-485 bus.
   
  2) USB to RS422 Mode
  USB to RS422 Converter - RS422 Mode
  - Turn OFF Jumper 1, 2 & 3 for RS-422 mode;
- IMPORTANT: Turn ON J4 (120 Ohm End-Of-Line Terminator) at both ends of the RS-422 (or 4-wire RS-485) bus.
   
 

CONNECTIONS (RS485 BUS / RS422 BUS)

  USB to RS485 Converter - Connection
 
USB to RS422 Converter - Connection
   
 

TROUBLESHOOTING INSTRUCTIONS FOR USB TO RS422 CONVERTER

 
 
1) Driver installation
USB to RS422 Converter - USB driver installation
  Make sure that the USB-RS422 converter is connected to your USB port, and the driver is installed correctly (as shown above); otherwise, please reinstall the driver (refer to user manual for details).
 
  2) Port power measurement
  USB to RS422 converter - 5V measurement
 
  Measure pin +5V and GND with a voltmeter, and be sure that it is around +5VDC (when USB port is connected).
   
  3) Loopback Test
  USB to RS422 converter: loopback test
 
  • Connect a USB-RS422 converter to your PC's USB port and remove Jumper 1 and terminate Jumper 2 and 3 on the RS485/422 terminal block (as shown above).
  • Run 232Analyzer FREE version software on your computer.
  • Select "ASCII" for both the Send and Receive data formats. Then send command and/or string such as "CommFront" from the 232Analyzer software. You should receive an echo of the command/string sent ("CommFront"). By performing a simple loopback test like this, you can test both the transmitter and receiver of the converter. This is very helpful when you are in doubt about the performance of your converter.
  USB RS422 Converter: Loopback Test 2
Screenshot: Send/receive commands from 232Analyzer software.

 

  232Analyzer is an advanced RS232 Serial Protocol Analyzer software that allows you to control, monitor and analyze serial port (RS232 / RS485 / RS422 / TTL, etc.) activities. Not just the data, it also allows you to monitor or change RS-232's line states: RTS, CTS, DTR, DSR, DCD, and RI.

The FREE version (no time limitation) can be downloaded from here.

TECH NOTES
RS-232: 3 easy steps to understand and control your RS232 devices