Model PMDX-122 Rev D

Buffered Bi-Directional Breakout Board
with "Charge Pump"

Click on image for larger view

The PMDX-122 is a motion control breakout board for interfacing with the parallel port of an IBM-PC style computer.

NOTE: new revision D board now uses DB-25 female connector for printer port connection

Features of the PMDX-122

• Supports all signals present on a standard printer port. (8 data, 5 input, 4 output)
• Allows the 8 bit data port to be used as outputs (step/dir/etc) or as 8 input bits.
• Great for second parallel port usage when using encoders or lots of feedback signals.
• New revision D now has terminations to assure signals from printer port go low on disconnect.
• New revision D now has noise filters on inputs for pins 11, 12, 13, and 15.
• New revision D uses DB-25 female connector to accept printer cable for connection to PC.
• Connection to PC can also be via a 26 pin ribbon cable which allows a remote DB-25 to be used.
• Provides LED status indicators on all 8 data port signals,  5 input and 4 output signals.
• Supports the MACH "charge pump" signal to inhibit outputs when the MACH software is not running.
• The "charge pump" function can be daisy chained between boards
• Inhibits outputs when E-Stop or Fault inputs are asserted.
• Reports E-Stop to computer on loss of power, E-Stop loop open,  Fault input grounded, or printer cable disconnected
• Provides one 10 Amp. relay on board for spindle or other I/O output function.
• Inputs have pull-ups to +5 volts and are filtered to suppress noise.
• Step and direction outputs from data bits can be common ground or common +5 volts for driving opto inputs.
• All I/O connections are made via wire clamp screw terminal strips.
• Auxiliary +5 volt DC output available to power sensors.
• Three power supply options. (external DC, external AC, or USB port power steal)
• LED to indicate "outputs enabled" status so "charge pump" status can be seen.
• Jumpers to control "charge pump" functionality, E-Stop behavior, and data port direction

Breakout board feature comparison table

Download the full Rev D manual in PDF format here (revision 1.12, 379 KB).
For the PMDX-122 Revision C manual, see the archives here.

The PMDX-122 is priced at $81.00

Cables are sold separately, please order the ones that you need.

For International customers or for alternate payment options - click HERE

For accessory cables CLICK HERE

For accessory switches and sensors CLICK HERE