DUAL PORT MULTIFUNCTION CNC BOARD C23 Rev 2
DUAL PORT MULTIFUNCTION CNC
BOARD C23 Rev 2
INPUTS = 18
OUTPUTS = 16
TOTAL =
34
INPUT PINS:
This board is provided with pull-down resistors
on all inputs and output pins. You can use NO
(Normally Open) or NC (Normally Closed)
switches for connecting home, limit, or e-stop
switches. +5vdc for a high or ground for a low
can be provided for valid input signals. Read the
notes at the bottom of the page.
POWER FROM YOUR PC:
Provide +5vdc from your computer.
You can use the provided USB
Power Cable or wire it directly to
your Pc’s power supply. No need
to use this if using a Smooth
Stepper. The SS will power the
optos.
Home or Limit
Switch
E-Stop
SOLID STATE RELAY:
A Solid State Relay is provided
for controlling AC devices. This
relay cannot be used with DC
currents. Connect it just as you
would connect any other switch.
2 ELECTROMECHANICAL RELAYS:
Two eletromechanical relays are
provided with NO (Normally Open) and
NC (Normally Closed) connections. Both
relays share the common VCC_IN, but
one reacts to Pin 1 and the other one to
Pin16. That way Pin1 can be used for
the solid state relay or the
eletromechanical relay. Please note that
both can be used at the same time.
To EN pin
POWER CONNECTIONS:
Provide +5vdc at 2 amps. . There
are extra terminals to ease
powering of external devices.
Sockets for connecting a
Smooth Stepper directly
or ribbon cables for using
regular parallel ports.
This connections are kept
fully optoisolated from the
rest of the connections
on this board.
NOTES:
This board has 18 inputs
and 16 outputs for a total of
34 I/Os.
1.All inputs and outputs are
provided with pull-down
resistors.
2. For connecting voltages
different to +5vdc, please
read the manual.
- NPN proximity sensors
can be connected directly.
- For PNP sensors use
limiting resistor in series.
For +12vdc use 470Ohm
and for +24vdc use 1kOhm.
ANALOG OUTPUT:
The analog output is optoisolated.
An external +12vdc power source
is required. This circuit consumes
less than 10milliamps. Use the
pot for fine tuning the output
voltage. If replacing a
potentiometer, use the 0-10vdc
for the connecting to the wiper
connection and make the grounds
common. In order to adjust your
final voltage, set your control
software at max speed, then turn
the pot till you reach the desired
output voltage.
COM TERMINALS:
Place the jumper in the appropriate
position to select +5VDC or GND
for the COM terminals.
The EN Pin:
In all cases the EN pin must receive
+5vdc in order to enable the inputs. You
can hardwire the EN pin with +5vdc if
you do not need to install an external
enable switch. If your E-Stop works as
NC (Normally Closed) with a +5vdc
signal, you can also send this signal to
the EN. That way your system would
have to wait for the control software to
stop.
OUTPUT STATUS:
This LED indicates if the
outputs are enabled.
OUTPUT PORT:
An additional output port is provided for connecting directly to a
any existing setup, or a driver that already comes with a DB25
connector. Such as Xylotex or HobbyCNC. By doing this you
would optoisolate your system, you will add all the features of
the board and still have access to all the pins.
SAFETY CHARGE PUMP:
The Safety Charge Pump now is
controlled through a microcontroller.
The first switch enables and disables
the SCHP, the second switch allows
to select the precision you want to
have signal sampled. In all cases
the external enable pin “EN” must
have +5vdc in order to have the
outputs enabled.
WARNING:
These grounds must be
common with the grounds
of the speed control
connection, but must be
kept isolated from the
grounds of the board.
This card must be powered while your system is under power.
Keep in mind noise can be transmitted into output signals that
could trigger unwanted actions in your system.
5/7/2009 cnc4pc.com
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