Mitsubishi Electronics GOT1000 manual 58

Connecting the ground cable from the panel that houses control equipment to the panel to which the GOT is grounded

When running a single ground cable from the panel that houses such piece of control equipment as a PLC to the panel to which the GOT is grounded, the ground cable may have to be directly connected to the terminal on the GOT.

Connection cable

FG

Ground cable from the panel that houses control equipment

If electric potential difference between the ground points created by it causes malfunctions, lowering the voltage as shown in Remedy 1 below may solve the problem.

•Remedy 1 (Refer to the figures Remedy 1-1 and 1-2 below.)

If the electric potential difference between the ground cable and the panel that houses the GOT is creating problems, connect the ground cable to the panel also.

If the wiring method as shown in Remedy 1-1 is not feasible, follow Remedy 1-2.

Connection cable		Connection cable
		Ground cable from
		the panel that
Ground cable from		houses control
	FG	equipment	FG
the panel that
		Use the thickest
houses control
equipment		cable possible.
Use the thickest	Panel		Panel
cable possible.	grounding		grounding
	Remedy 1-1		Remedy 1-2

If taking Remedy 1 worsens noise interference, taking Remedy 2 may alleviate it.

•Remedy 2 (Refer to the figures Remedy 2-1 and 2-2 below.)

Attach a ferrite core to the cable if noise from the GOT panel has adverse effects on the GOT when Remedy 1 is taken.

Wind the wire around the ferrite core several times (approx. 3 times), if a ferrite core is used. If the wiring method as shown in Remedy 2-1 is not feasible, follow Remedy 2-2.

Connection cable		Connection cable
		Ground cable from
		the panel that
Ground cable from	FG	houses control
the panel that		equipment	FG
houses control	Ferrite core	Use the thickest	Ferrite core
equipment		cable possible.
Use the thickest	Panel		Panel
cable possible.	grounding		grounding
	Remedy 2-1		Remedy 2-2

7 - 4	7. WIRING
	7.1 Power Supply Wiring