OptoIso Input adapter is a device that opto-isolates Mk3 controller inputs from external devices such as proximity sensors, input switches, probes and similar devices.
Its main function is to protect the input circuitry of Mk3 controller from any damage that mmay occur due to improper wiring or power surges at the side of externally connected device.
Also, using this adapter reduces electrical noise influence at controller inputs and makes up for easy connection of proximity switches.
Solder jumpers are located at the bottom side of the adapter.
“+” solder jumpers: Each opto isolated input uses dedicated “+” solder jumper. This jumper is used when you want to use e.g. NPN type of proximity sensor. So if you connect your switching device that will supply the IN- terminal with GND, you can solder “+” jumper so that IN+ terminal will have constant Vcc potential.
“-” solder jumpers: Each opto isolated input uses dedicated “-” solder jumper. This jumper is used when you want to use e.g. PNP type of proximity sensor. So if you use your switching device that will supply the IN+ terminal with Vcc when triggered, you can solder “-” jumper so that IN- terminal will have constant GND potential.
This is very useful when user wants to use both types of external switching devices with one board, e.g. PNP and NPN proximity sensor.
Each input uses opto-coupler and a resistor.
|Input+||Input for Vcc signal of opto input|
|Input-||Input for GND signal of opto input|
|GND||GND terminal for switching device|
Schematic below describes the use of OptoIso Input adapter with NPN and PNP proximity sensor. IN- terminal of first input need to be connected with GND terminal.
IN+ terminal of second input need to be connected with Vcc terminal.
Connection diagram using solder jumpers:
Instead of manually wiring the IN- or IN+ terminals of dedicated input, user can solder the jumper and achieve the same effect.
TNG software settings related to Input header are located under:
All settings above use inputs located at the Input header. Devices related to the input header can be connected to controller trough OptoIso Input adapter.
You can map inputs of OptoIso Input adapter as a shortcut pin in PlanetCNC TNG.
Reading Inputs: OptoIso Input adapter status values are available through parameters
_input _hw_input _input |num _hw_input|num
You can use them with your gcode, script files, expressions, toolbar buttons etc..
DXF file is available at link below: OptoIso Input DXF file