| Features |
PMDX-132 |
PMDX-125 |
PMDX-122 |
PMDX-120
(legacy) |
PMDX-108-Input |
PMDX-108-Output |
PMDX-104 |
PMDX-103 |
| 8 Data bit outputs |
16 mA buffered for step and direction |
16 mA buffered for step and direction |
16 mA buffered for step and direction when configured for output |
16 mA buffered for step and direction |
none |
see relays below |
none |
4 mA output with full isolation |
| 8 Data bit inputs |
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 |
| Selectable "common" for step and direction |
yes, via jumper for each Gecko location |
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 |
yes, via one jumper for all step and direction outputs |
n/a |
n/a |
n/a |
n/a |
| 4 Control outputs |
6 mA isolated and buffered |
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 |
via relays only |
none |
none |
terminal strip for logic inputs from other boards, see relays below |
4 mA with full isolation |
| 4 Expanded Control outputs |
no |
16 mA buffered |
no |
no |
no |
no |
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 |
isolated input with pull up to 5 volts, use with switch to ground, 5 volt logic
signals, or 24 volt PLC signals |
buffered input with pull up to 5 volts, use with switch to ground, or 5 volt logic
signals |
isolated input with pull up to 12 volts, not logic signal compatible |
no |
no |
no |
isolated input for 5 volt logic signals, no pull up |
| 4 Expanded Control inputs |
no |
isolated input with pull up to 5 volts, use with switch to ground, 5 volt logic
signals, or 24 volt PLC signals |
no |
no |
no |
no |
no |
no |
| LED's |
power, charge pump OK, all signals, relay status |
power, charge pump OK, all signals, relay status, step activity |
power, charge pump OK, all signals, relay status |
power, all signals, relay status |
power, all signals |
power, all signals |
all signals |
power |
| Relays |
2 SPDT relays rated:
10A at 24 VDC/240 VAC |
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
|
4 SPST relays rated:
10A at 24 VDC/240 VAC, all with MOV protection for contacts
|
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 |
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 |
yes |
yes |
no |
n/a |
yes |
n/a, supplied by signal source |
n/a |
| 2nd parallel port to host |
no |
yes, supports 4 expanded inputs and 4 expanded outputs |
no |
no |
can be used stand alone as second port, or with PMDX-125 or SmoothStepper |
can be used stand alone as second port, or with PMDX-125 or SmoothStepper |
n/a |
n/a |
| stepper motor test built in |
no |
yes |
no |
yes |
n/a |
n/a |
n/a |
n/a |
| other features |
direct mount on Gecko stepper drivers |
multimode selections for relay functions and expanded I/O |
none |
DIP switch polarity setup |
parallel port pass through for ribbon cable to next board |
parallel port pass through for ribbon cable to next board |
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 |
120/240 VAC switch selectable |
- 9 to 12V DC or AC
- or +5V DC regulated
- or USB power
|
- 120/240VAC factory option
- or 9 VAC
|
5 volt regulated, from terminal strip or ribbon cable to PMDX-125 |
5 volt regulated, from terminal strip or ribbon cable to PMDX-125 |
requires +5 volts, can be supplied by PMDX-125 |
- 9V AC or DC
- or +5V DC Regulated
|