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PS2PROX-xxx   by Versalent   Home

Converts PS/2 Keyboard to RS232 Serial Keyboard

eXtended version of the popular PS2PRO. All keyboard keys now re-programmable, and with longer strings. Compatible with PS2PRO devices.

A small low-cost module to convert a PC wired keyboard (PS/2) to an RS232 serial keyboard. Outputs the simple ASCII (serial) characters printed on the keyboard keys or your custom strings. Accepts a PS2 connector from the keyboard and provides a standard DB9 RS-232 output to connect to your asynchronous serial port. Can be powered by supplying +5VDC, or +6 to +12VDC through the DB9 connector, or by the optional 6V wall adapter (purchased separately). Multiple DCE or DTE* pin configurations (both with DB9 female) available for minimal pin-swapping. See configuration notes here.

NOTE:   To program a PS2PROX it must be plugged into a PC COM port. To supply power, consider the Progit-1 USB programming adapter which provides power and a USB COM port.
For wireless keyboard version see WLKB232 model

  PS2 Facts/Info    Typical Application    Manual    Default Key-Outputs
PS/2 Converter
more pictures
Serial Terminal
PS2PROX Datasheet by Versalent
  • Converts PC-Keyboard Codes to Simple ASCII
  • All 102 keys user-programable for 0-10 char string (non-volatile storage)
  • Non-ASCII Keys Send 8-bit Characters
  • Keyboard LEDs Fully Operational
  • ALT/CTRL Keys Easily Detected By Host
  • RS-232 Connection To Host W/Selectable Baud/Parity. Baud rates from 1200 to 115k
  • Works with wired PS/2 keyboards
  • Operates on your 5VDC, or 6-12VDC,or w/optional wall adapter (PS2-PWR)
  • Keyboard is 'Hot-Pluggable'
  • Low cost
  • Systems without PS/2 protocol support
  • Embedded systems requiring low cost/full size keyboards
  • Full size override of miniature or limited-key keypads
  • CNC machine keyboard replacements

       PS2PROX is a 2.6" X 1.7" X 0.8" module which provides a complete interface to a standard IBM PC PS/2 keyboard handling the 2-wire keyboard protocol, and converting all the default SCAN SET 2 keycodes to simple ASCII characters. This allows non-PC systems using low-end microcontrollers, or powerhouse microcomputers to use inexpensive PC keyboards without dealing with the complexities of multiple keycodes in real-time. PS2PROX handles all the real-time response requirements of the keyboard protocol and even transparently manages the keyboard LEDs (CAPS LOCK, NUM LOCK, SCROLL LOCK) independent of the host computer. The host receives just the ASCII characters as printed on the keyboard`s keys (or the custom programmed characters/string) with any modifiers such as the SHIFT keys already applied.
       PS2PROX auto-detects the presence or absence of the keyboard on power up and reports the condition to the host. Full manual is available here. A diagram of all 102 keys and their corresponding serial-character outputs is available here.

PS2PROX-XXX is available with power source and RS-232 options to provide the flexibility to mate to a variety of systems without additional adapters.
*All units whether DTE or DCE provide DB9 female connector
Support Utilities
(Download and run the included .exe)
Simple Term (terminal emulator/displays even non-printable characters) download

ProXConfig (configuration program that allows you to define custom output strings) download
See configuration notes here.
Models Available

Model NumberDefining Features
PS2PROX-014 DB9=DCE, +5.0VDC Power supplied via DB9 Pin 4
PS2PROX-016 DB9=DCE, +5.0VDC Power supplied via DB9 Pin 6
PS2PROX-024* DB9=DCE, 6VDC to 12VDC Power supplied via DB9 Pin 4, or optional 6V wall adapter
PS2PROX-026* DB9=DCE, 6VDC to 12VDC Power supplied via DB9 Pin 6, or optional 6V wall adapter
PS2PROX-034 DB9=DTE, +5.0VDC Power supplied via DB9 Pin 4
PS2PROX-036 DB9=DTE, +5.0VDC Power supplied via DB9 Pin 6
PS2PROX-044* DB9=DTE, 6VDC to 12VDC Power supplied via DB9 Pin 4, or optional 6V wall adapter
PS2PROX-046* DB9=DTE, 6VDC to 12VDC Power supplied via DB9 Pin 6, or optional 6V wall adapter
* These models cost slightly more due to additional internal regulator.
Note: DCE Models plug directly into COM port with no pin-swaping

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