Connect both Chassis Ground and Logic Ground to the GND pins on Arduino Mega ADK?

[technook]

Hi guys,

I have an Arduino Mega ADK board which I am programming it as a BCD Parallel Interface to control the frequency of another equipment, an Ultra-Fast Direct Synthesizer. From the datasheet, in the 50 pin connector to the equipment, there are 2 pins dedicated for Chassis Ground and Logic Ground respectively.

My concern is that the equipment itself is powered by a 85-264 VAC, 45-440Hz power supply. In this case, can I simply just connect both Chassis Ground and Logic Ground to the GND pins next to the Vin pin on the Arduino Mega ADK board?

Thank you for your time.

[bluejets]

Typical application for opto isolator one would imagine.

[lastchancename]

@technook

can I simply just connect both Chassis Ground and Logic Ground to the GND pins

Basically, yes, but for specifics, it depends on the electrical environment around the case and power supply.

Logic ground is the 0V potential that Vcc and the control signals are referenced from…. Chassis ground is to protect the users and circuitry from any stray or hazardous voltages that may arise ‘separate to’ the controller and its power supply.

Both are very important for different reasons.

[technook]

Thank you for the detailed explanation! I was mainly intrigued by the presence of a chassis ground pin in the 50 pin connector, given that the equipment uses a 3 pin power cord so I would assume that the chassis is sufficiently protected against any leakage current. I guess I shall try connecting them together and hope that everything works out well.