Toshiba SX 2000 - Manual (Page 152)

4.5 Grounding
(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 2mm2 or larger wire in shortest
possible distance.
• Use a dedicated ground for the control circuit, and keep the ground cable
away from that for high-power systems.
• 10OQ 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.
Flowever, 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 S2T. 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.
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