CNC4PC C1G Manual

C1G - PARALLEL PORT INTERFACE CARD

Overview

This card has been designed to provide a flexible interface to your computer projects, by
using the parallel port control software. The screw-on connections to all terminals provide you
with an easy way to wire your connections. This flexibility enables you to achieve a quick and
straightforward integration with many popular software and hardware packages. This board is
offered for users that do not need optoisolation for the output signals that go to the drivers,
because they are using drivers that already have optoisolated inputs, such as the Geckodrive
family of products.

Features

• Partially optoisolated
The card isolates connections to protect your computer from short-circuit. An optoisolator is
an integrated circuit that transmits the signal through an encapsulated LED and
phototransistor. When the signal is on, the LED lights up, the phototransistor captures it and
relays the signal. In that way, your computer's electronics are completely isolated from your
circuitry. The signals are transmitted through light and not through physical connections. In
this way, a power surge has no way of reaching your computer.
optoisolated. Input pin15 and output pin 16 have high speed optoisolators. These can be
used to receive and send optoisolated step or frequency signals. A typical use for this would
for connecting an input from and index pulse that would read the rotation of the spindle. A
typical step signal would be the frequency to run a safety charge pump, a PWM signal, or a
the step signal for running the C6 – Variable Speed Control. No optoisolation is provided for
grounds.
• Buffered outputs.
All inputs and outputs are buffered through the use of high speed and high power buffers, with
the result that your devices receive all the power they need.
• Output pins 1,2,3,4,5,6,7,8,9,14,16,17.
• Input pins 10,11,12,13,15.
• Status LEDs on all inputs and output connections.
No more guessing. You can SEE all your signals. Save valuable time and brainpower for
cncing.
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Manual
Only outputs 2-9 are not
Revision: 03/05/2007