Wiring Power Lines And Grounding Equipment - Sharp JW-20FL5 User Manual

[2] Wiring power lines and grounding equipment

This section describes how to wire power lines and ground lines in a distribution panel, or controller
panel for the FL-net system.
When wiring power lines and making grounds, observe the precautions below.
1. Isolate the control power circuit from the controller power circuit using an isolation transformer with a
static electricity protective function.
2. Ground the frames of the distribution panel and the control panel using class D grounding.
3. Provide an exclusive class D or better ground to the controller FG (frame ground) terminal. Do not
connect this terminal to the controller frame.
4. The wiring for the power line to the controller should be as short as possible, using twisted power
cables.
5. Connect the LG (line ground) terminal on the controller to the shield terminal on the isolation trans-
former, and then to the frame ground on the panel.
Control Distribution
panel
power
Panel
ground
Class
D ground
Operation
preparation
Relay circuit
Panel ground
(5.5 mm or larger)
2
Class
D ground
An example of how to ground the FL-net system
15-59
Chapter 15: Appendix
Control panel
PLC, etc.
Controller ground
(5.5 mm or larger)
2
Class
D ground
15