2
– 18
Frame ground (FG)
This terminal is connected to the cabinet. To prevent electric shocks, carry out Class 3
grounding by connecting the dedicated wire.
A surge absorbing element is provided between the controller's power line
and cabinet. Confirm that the supply power is 290V or less between the
power line and grounding, and then connect. If the power between the power
line and grounding is 290V or more, the absorbing element could be
damaged and the controller could be damaged.
Surge absorber dedicated terminal (LG)
This terminal is provided in addition to the FG terminal to protect the circuit from external
lightening surges or noise, etc.
When installing the controller, short circuit the LG and FG terminals with the enclosed
jumper fitting so as to protect the circuit from external lightening surges and noise, etc.
Normally (when shipped from the factory) LG and FG are short circuited with
a jumper fitting. When carrying out an insulation resistance test (500V
megger test) or withstand voltage test (1000VAC), the results may appear
faulty due to the current leaked by the surge absorber. In this case, remove
the jumper fitting between LG and FG before carrying out the tests.
CAUTION
CAUTION
Jumper
fitting
Surge
absorber
Surge
absorber
Controller side
Содержание CA20-M10
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