Opto-Isolated Digital Inputs Terminals - MachMotion IO6 V4.0 Manual

Phoenix Auxiliary terminal connections described in Parallel Port I/O Interface
connections below. The speed measuring input is used in Lathe threading operations.
The most reliable spindle speed sensing and position sensing is obtained by employing
a differential incremental encoder mounted to the spindle. Alternatively, a 5V NPN
optical sensor can be mounted on the spindle which would provide one pulse per
spindle revolution. The single ended signal from the sensor would be connected to the
NDX terminal on the Auxiliary Terminal Block. Both the encoder index pulse and the
single ended input are routed through the IO6 on-board CPU for signal conditioning and
then routed to the Mach3 CNC control program running on the PC.
Three DIP switches are provided to allow selection of either the differential signals or
the 5V single ended inputs to be used for RPM measuring. To enable differential input
from a spindle encoder through the mod jacks, close the following Dip switches:
Dip Switch 1 (closed) connects spindle encoder signal A to PC parallel port 2 input pin
12 (Used for spindle rotational position indication only)
Dip Switch 2 (closed) connects spindle encoder signal B to PC parallel port 2 input pin
15 (Used for spindle rotational position indication only)
Dip Switch 3 (closed) connects spindle encoder index pulse to the IO6 CPU. (This
encoder input can be used for spindle speed measuring and lathe threading.
To allow RPM measuring with a single ended signal input at the NDX terminal on the
Auxiliary Terminal Block, leave the three dip switches mentioned above in the open
position.
Dip Switch 3 (closed) connects the differential spindle encoder
signal I (index) to the IO6 CPU. Setting this switch to "open"
allows either the single ended signal connected to the phoenix
screw terminal labeled NDX, (See page 16 Figure #12) All of
these inputs are routed through the opto-isolated digital input
circuits and to their respective PC parallel port pins (see next
paragraph).
A third Spindle Speed measuring option is also available: A 5V
index signal may be connected to opto-isolated input port B, pin
13. This input is not routed through the IO6 CPU for signal
conditioning. Use the Mach3 ports and pins Spindle input
configuration pull down menu to tell Mach3 control to receive
this input for spindle speed.
8. Mixed assortment of digital I/O interfaces
The IO6 provides ten high speed general purpose digital opto-isolated inputs. The IO6
also has 8 relays with 2 amp output contact pairs.

9. Opto-Isolated digital inputs terminals

For noise immunity, ten terminals are available for opto-isolated inputs to the Mach3
control. The first seven of these opto-isolated inputs (parallel port 1, pins 10,11,12,13,
and 15, as well as parallel port 2, pins 10 and 11) are connected to the phoenix Primary
Terminal block and also to pin 1 of each of the six axis mod jacks respectively. These
are provided to allow an optional input from a servo drive if needed. Each input has an
10
5
4
3
2
1
Figure 7