Grounding Between Units; Line Filter Ground (Lg) Terminal; Frame Ground (Fg) Terminal - Toshiba V Series User Manual

Chapter 4 Installation and Wiring
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(2) Grounding between units

• Connect the FG terminal of the power supply module to the unit mounting screw,
and to the ground bar in the panel by 2mm
distance.
• Use a dedicated ground for the control circuit, and keep the ground cable away
from that for high-power systems.
100 Ω or less to earth is recommended.
•

(3) Line Filter ground (LG) terminal

The LG terminal is a neutral point of the primary power supply line filter. It can
suppress the effect caused by the noise from power supply line, by grounding the LG
terminal.
Therefore, normally, ground the LG terminal together with the FG terminal.
However, depending on the power system, leakage current to the ground from the
LG may cause problems. In this case, install an isolated transformer in the power
line, or open the LG terminal. If the unit is installed in isolation, open the LG terminal.
Do not connect the LG and FG terminals without grounding them.

(4) Frame ground (FG) terminal

The FG terminal is a protective ground point of the model 2000. The FG terminal
voltage is equalized to that of the base. For safety, ground them at single-point in
order to minimize the risk of electrical shock.
PS
Basic unit
FG
PS
Expansion unit
PS
Expansion unit
Ground bar in the panel
Dedicated ground
2
or larger wire in shortest possible
model 2000 Sequence Controller S2 User's Manual -Basic Hardware-