Re: G540 ground questions
What you could do is set up a terminal plate of some kind to create a star point earth ground for all required earth GND connections, this would include the service earth ground conductor.
The other is to use a short DIN rail and use the yellow/green terminals that automatically connect all terminals together when mounted to the rail.
The case of the G540 should be grounded also.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.