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Modbus / DIY MODBUS I/O board.
« on: August 20, 2011, 12:33:44 PM »
Hello everyone,
I usually don't visit this forum much as I tend to hang on the Yahoo user group, some of you probably recognises me from there. Since there might be members here that don't visit the Yahoo group much I thought I'd mention the following here as well in case anyone's interested.
I've designed a small I/O board that can be interfaced to Mach3 over serial (RS232) MODBUS RTU. Here's a short list of features:
* 4 digital inputs, opto-isolated, can be adapted to "any" input voltage. Positive or negative logic on each inout, LED indicator on each input.
* 4 digital outputs, open collector, 50V, 500mA. LED indicator on each output.
* 2 analog inputs 0-5V, 10 bit resolution (oversampled to 12bit in firmware).
* 1 analog output, 0-10V 10mV resolution.
It's been designed to be easy to build yourself, all thru hole components and no exotic parts, BOM with Digikey P/N's is supplied. If you have the skill and equipment you could even each the board yourself.
All the files (schematic, boardlayout, gerbers, BOM, firmware) and information you need to build one is available on my website. If you're familiar with setting up a MODBUS device in Mach3 then this one is no different but if you're not I have a guide on how to make it work.
/Henrik
I usually don't visit this forum much as I tend to hang on the Yahoo user group, some of you probably recognises me from there. Since there might be members here that don't visit the Yahoo group much I thought I'd mention the following here as well in case anyone's interested.
I've designed a small I/O board that can be interfaced to Mach3 over serial (RS232) MODBUS RTU. Here's a short list of features:
* 4 digital inputs, opto-isolated, can be adapted to "any" input voltage. Positive or negative logic on each inout, LED indicator on each input.
* 4 digital outputs, open collector, 50V, 500mA. LED indicator on each output.
* 2 analog inputs 0-5V, 10 bit resolution (oversampled to 12bit in firmware).
* 1 analog output, 0-10V 10mV resolution.
It's been designed to be easy to build yourself, all thru hole components and no exotic parts, BOM with Digikey P/N's is supplied. If you have the skill and equipment you could even each the board yourself.
All the files (schematic, boardlayout, gerbers, BOM, firmware) and information you need to build one is available on my website. If you're familiar with setting up a MODBUS device in Mach3 then this one is no different but if you're not I have a guide on how to make it work.
/Henrik