Q-PLC Power Supply Grounding

[autoexecncf 0]

HI Searched the forums and did not find an answer to this question. I have a Mitsubishi Q-PLC with the Q62P Power Supply module. It has two grounding nodes called LG and FG. I attached a snip from the Mitsubishi Quick Start guide for reference; what I'd like to know is this: Do the abbreviations stand for Line Ground and Field Ground? What are the purposes of each? I would assume that Line Ground is for AC Mains and the Field Ground is for switch / sensor / module returns, but can't find a verification in the documentation. Appreciate any clarification in advance. We have a customer wanting to know the answer for their safety certification process and I'd like to be able to answer them correctly. Ray

[bobtalbot 1]

I'm assuming (scared yet?) Line Ground and Frame Ground. See the attached pdf that explains an A1S power supply. I would think same applies here A1S_PowerSupply.pdf Edited 14 Mar 2012 by bobtalbot

[Crossbow 295]

Look at the hardware design manual, not the quick start guide. They are detailed there. SH(NA)080483 section 7 FG - Ground terminal connected to the shield pattern of the printed circuit board. LG - Grounding for the power supply filter. For AC input, it has one-half the potential of the input voltage.

[autoexecncf 0]

Will do. Appreciate the fast response all. ray

[plcdp 11]

So when wiring I should tie both terminals to ground? Why have two terminals? -plcdp