PMDX-132 User’s Manual
PCB Revision: PCB-466A
Document Revision: 1.0
Serial Numbers: 23410 and above
PMDX-132_Manual_10.doc
©2008 Practical Micro Design, Inc.
Page 5 of 24
17 April 2008
All Rights Reserved
3.
For each Gecko stepper driver module, determine the step/direction common reference required:
•
Models G201 and G202 without the G901 step multiplier board require a +5V common.
•
Models G210 and G212, and the G201 or G202 with the G901 step multiplier board installed can
be configured for 5V or GND. Look at the “Input Option Header” jumpers and record
the setting.
•
Model G203V requires a GND common reference.
4.
Take the results from step (3) above and configure the four PMDX-132 jumpers JP5, JP6, JP7 and JP8
to supply to correct common reference to each Gecko drive. See section 5.4 for more information.
5.
For each Gecko stepper driver module, plug the 4-pin terminal strip (supplied with the PMDX-132)
onto the Gecko module’s “Phase A” through “Phase D” terminals.
6.
Connect each motor to the 4-pin terminal strips on the Gecko stepper driver module
7.
Plug each Gecko stepper driver module onto the connectors on the bottom of the PMDX-132.
8.
For each Gecko stepper driver module, install the motor current set resistor in the corresponding 2-
pin terminal strip on the PMDX-132. When looking at the PMDX-132/Geckodrive assembly from
the edge as shown in Figure 1, this would be the green 2-pin terminal strip above and to the right of
each Geckodrive module.
9.
Install either (a) an emergency stop switch, or (b) a jumper wire from “E-Stop” to “GND” on
connector J10. See section 3.5.2 for more information.
10.
The resulting assembly should look similar to Figure 1.
Figure 1 – Sample PMDX-132 and Geckodrive Assembly
2.3
Example Limit Switch Wiring
Mechanical switches, in either “normally open” or “normally closed” configurations, or optical interrupter
switches can be used to provide input signals to the PMDX-132. These switches can act as limit switches,
home indicators or other status information. Since the PMDX-132 provides pull-up resistors on the
status inputs (see section 3.4), mechanical switches can be wired directly to the signal pins on J8 and
ground. Note that the examples below show the signals connected to “pin 11” input. The input signals
may be connected to any of the signal pins on J8.
Normally Closed Switches
The left-hand drawing in Figure 2 shows an example of “normally closed” mechanical switches. The
switches are wired in series so that the “normal” case is ground (logic low) going into pin 11 of the PC’s
parallel port. When one or more of the switches open, the pull-up resistor on the PMDX-132 provides a
