Vetra Systems Corporation
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Convert
USB Keyboard to RS-232 Serial ASCII
USB-341 Converter
 USB-341 Converter
(Front and Rear View)

 
USB-341  ReversePipe™, USB Keyboard to RS-232 Converter 
The USB-341 USB keyboard to ASCII serial RS-232 converter accepts a standard USB Keyboard and generates serial ASCII codes when USB keyboard keys are activated.
$179.00 

Description:

The USB-341 “ReversePipe”™ Protocol Converter converts the output of a standard USB keyboard to serial ASCII RS-232 format, effectively making it an ASCII keyboard. The USB-341 USB keyboard to serial ASCII Converter is powered from a 5V DC wall mount power supply which is purchased separately. We recommend the VIP-211, for 100 - 240 V AC 47-63 Hz input, however, you may provide your own supply (see specifications below).

Code Conversion for the VIP-345

The standard ASCII code set is very common in RS-232 applications, but the standard PC keyboard does not generate ASCII codes, but its own set of scan codes. If ASCII codes are desired from a PC keyboard, translation to ASCII is necessary.

The ASCII codes generated for USB keyboard keys are shown in the "PC Key Code to ASCII Translation" Table. To use the table, find the key in the table, then read the code in hex from the column/row digits. The most significant hex digit is in the top row, the least significant is in the left column. For example, the @ sign will produce hex 40. Codes beyond the standard ASCII table have been added to support keys found on the PC keyboard, but not in the ASCII character set. For instance, hex codes A0 to AB will be generated for the twelve function keys, F1 to F12.

The ASCII code is generated when a keyboard key is pressed. No code is generated when a key is released. The Alt and Control keys, both left and right, are an exception, as shown in the Table above. Separate codes are generated when one of these key is pressed, and when it is released. If the Shift key is held down, upper case ASCII characters, or characters, such as the @ sign, will be generated.

The DB-9 connector on the USB-341 transmits data on Pin 3, and Pin 5 is ground.

The USB-341 uses the following RS-232 format: 1 start bit, 1 stop bit, 8 data bits, and no parity.

In addition to the default baud rate of 9,600 baud, 4,800 baud and 19,200 baud are available.


Features:

  • Designed and manufactured in the USA for use around the world
  • Backed by a Limited 3 Year Warranty
  • USB Hot Plug feature allows USB keyboards to be plugged in or out at any time!
  • Three baud rates are available. In addition to the default 9,600 baud, 4,800 baud and 19,200 baud are also available.

Connections:


Connections between the unit and the serial data destination are made via a DB-9 cable. A six foot (approx. 183 cm) female/female DB-9 cable is supplied with the unit. The USB keyboard plugs directly into the unit.

The USB-341 ReversePipe™ Serial Converter is powered from an external power source. We recommend the VIP-211, but you may provide your own supply (5VDC regulated, 300 mA minimum, plug type must be
PL06 2.5mm / 5.5mm barrel type with +5V on the center pin).

Specifications:


Unit dimensions of the USB-341 USB Keyboard to Serial Converters are 1.02 in H x 2.50 in W x 3.00 in D (2.59 cm x 6.35 cm x 7.62 cm). All housings are molded of black GE Cycolac-T, a high impact ABS material. FCC and CE marked. Shipping weight is under 1 lb.
 Environmental Operating Temp:
Storage Temp:
5 to 104 deg. F (-15 - 40 deg. C) 
-4 to 122 deg. F (-20 - 50 deg. C)
 Supported Hardware Computer:  
Peripherals:
Any device accepting RS-232 serial data
USB keyboards
ReversePipe™ is a trademark of Vetra Systems Corporation
Copyright © by Vetra Systems Corporation. All Rights Reserved

For user instructions in PDF format.
For a copy of Adobe's Acrobat® Reader

All prices are subject to change without notice.
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