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PMDX

an affiliate of Practical Micro Design, Inc.

Products for CNC and motion control applications since 1998.
Design, manufacturing, and support based in the USA.

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Breakout, I/O, and Isolation Board Features Table

Features PMDX-132 PMDX-133 PMDX-134 PMDX-126 PMDX-122 PMDX-109 PMDX-108-Input PMDX-108-Output PMDX-105 PMDX-104 PMDX-103
8 Data bit outputs 16 mA buffered for step and direction non-buffered, direct from ribbon header to 3 Geckos and chained output to 3 more on next PMDX-133 non-buffered, direct from ribbon header to 4 Gecko drivers 16 mA buffered for step and direction 16 mA buffered for step and direction when configured for output see relays below none see relays below none none 4 mA output with full isolation
8 Data bit inputs no no no no 5 volt logic signal inputs when configured for input no isolated inputs with pull up to 5 volts, use with switch to ground, 5 volt logic signals, or 24 volt PLC signals no no no no
Selectable "common" for step and direction yes, via jumper for each Gecko location no, uses ground for all three drivers no, uses ground for all four drivers yes, each step and direction connector has both a  +5 volt and a Ground terminal available yes, via one jumper for all step and direction outputs n/a n/a n/a n/a n/a n/a
4 Control outputs 6 mA isolated and buffered control signal outputs usable as extra step and direction signals to second PMDX-133 none 16 mA buffered only, usable as high speed output for step and direction 1 relay only, 3 as ? mA buffered only, usable as high speed output for step and direction none none none terminal strip for logic inputs from other boards, see relays below terminal strip for logic inputs from other boards, see relays below 4 mA with full isolation
4 Expanded Control outputs no no no 16 mA buffered no no no no terminal strip for logic inputs from other boards, see relays below terminal strip for logic inputs from other boards, see relays below no
5 Control inputs isolated input with pull up to 5 volts, use with switch to ground or 5 volt logic signals no no isolated input, use with switch to ground, 5 volt logic signals, NPN or 24 volt PNP sensors buffered input with pull up to 5 volts, use with switch to ground, or 5 volt logic signals no no no terminal strip for 4 inputs from PNP sensors, PLC's and other signals that can source current including 5 volt logic no isolated input for 5 volt logic signals, no pull up
4 Expanded Control inputs no no no isolated input, use with switch to ground, 5 volt logic signals, NPN or 24 volt PNP sensors no no no no terminal strip for 4 inputs from PNP sensors, PLC's and other signals that can source current including 5 volt logic no no
LED's power, charge pump OK, all signals, relay status motor power on motor power on power, charge pump OK, all signals, relay status, step activity power, charge pump OK, all signals, relay status power,
all signals
power,
all signals
power,
all signals
none all signals power
Relays 2 SPDT relays rated:
10A at 24 VDC/240 VAC
no no 2 relays:
1 SPDT rated 10A at 24 VDC/240 VAC, plus 1 SPST rated 20A 240 VAC, both with MOV to protect contacts from inductive loads
1 relay rated:
10A at 24 VDC/240 VAC
8 SPST rated at 10A at 120/240VAC or 5A at 30VDC with protection for driving inductive loads, also great for providing isolated "switch closures" to control VFD's and PLC's no 8 low power "photo-MOS" solid state relays rated at 80mA 150 volts AC or DC with protection for driving inductive loads, also great for providing isolated "switch closures" to control VFD's and PLC's can be used to provide 4 "open collector" NPN outputs capable of 200 mA and 50 volts 4 SPST relay outputs support AC or DC loads up to 5 amperes maximum, all with MOV protection for contacts None
Charge Pump Support yes n/a n/a yes yes yes n/a yes n/a, supplied by signal source n/a, supplied by signal source n/a
2nd parallel port to host no n/a n/a yes, supports 4 expanded inputs and 4 expanded outputs no can be used stand alone as second port, or with PMDX-126 or SmoothStepper can be used stand alone as second port, or with PMDX-126 or SmoothStepper can be used stand alone as second port, or with PMDX-126 or SmoothStepper n/a n/a n/a
stepper motor test built in no n/a n/a yes no n/a n/a n/a n/a n/a n/a
other features direct mount on Gecko stepper drivers direct mount on Gecko G203V or G201X drivers, motor "freewheel" input direct mount on Gecko G203V or G201X drivers, motor "freewheel" input multimode selections for relay functions and expanded I/O none parallel port pass through for ribbon cable to next board parallel port pass through for ribbon cable to next board parallel port pass through for ribbon cable to next board opto-isolated signal translator can be used for inputs or outputs all connections via terminal strips to allow use with any breakout board high speed isolation suitable even for step and direction signals
Power Options 120/240 VAC selected by terminal strip connection distributes DC motor supply to four drivers distributes DC motor supply to four drivers 120/240 VAC switch selectable
  • 9 to 12V DC or AC
  • or +5V DC regulated
  • or USB power
5 volt or 24 volt regulated, from terminal strip 5 volt regulated, from terminal strip or ribbon cable to PMDX-126 5 volt regulated, from terminal strip or ribbon cable to PMDX-126 no operating power supply needed, can accept +V for pull-up function requires +5 volts, can be supplied by PMDX-126
  • 9V AC or DC
  • or +5V DC Regulated