Specifications

Installing the control panels
2.3.5
Installing lightning-surge absorbers
2
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 I/O modules
The enclosure that houses the I/O module must be at least 180 mm deep so that the front cover can be
opened safely.
2.3.5 Installing lightning-surge absorbers
Lightning-surge absorbers must be installed to prevent electric and electronic devices from
malfunctioning even if the power, communication, or signal line is subjected to a high-
energy disturbance such as switching or lightning surge. Normally the power line should be
provided with surge absorbers as shown below.
• Normal-type surge absorber between phases
• Common-type surge absorber between phases and ground
Fig. 2.7 Installing lightning-surge absorbers
40mm
PS module
40mm
I/O
module
180 mm or more
DIN rail
(Up)
(Down)
(Left)
(Right)
20mm
20mm
INFO
Circuit
protector
Surge absorber
between phases
and ground
CNC
Conver
ter
Inverter
SERVO
PACK
200/220/230 VAC
50/60Hz
Circuit breaker
Control panel
Electronic devices
Motor
Grounding resistance
100
Ω
or less
Panel grounding plate
Surge absorber
between phases