IDEC SmartAXIS FT9Z-1A01 User Manual page 69

Power Supply Wiring
When connecting the power supply, be sure to take care of the following:
Use a stranded wire of UL1015 AWG22 or UL1007 AWG18 for power supply wiring. Make the power supply wiring as short as possible.

Run the power supply wiring as far away as possible from motor lines.

is the protective ground terminal. To prevent electric shocks, ground the terminal with D-type ground (type 3: ground resistance of 100Ω

maximum).
is the functional ground terminal. To prevent malfunction or breakdown of the SmartAXIS due to noise, ground the terminal with D-type

ground (class 3: ground resistance of 100Ω maximum).
When connecting a stranded wire or multiple wires to a terminal block, use a ferrule.

Use the SmartAXIS within the specifications of ratings and environmental conditions. Failure to do so may cause the

Caution
SmartAXIS to break down or reduce product life.
Be sure to connect the grounding wire to a proper ground, otherwise electrical shocks may be caused.

Do not touch live terminals, otherwise electrical shocks may be caused.

When connecting the power supply, tighten the terminal screws with torque of 0.5N·m (5kgf·cm).

Grounding
When grounding the power supply, be sure to take care of the following:
Do not use the common ground for the SmartAXIS and motor equipment. The common ground can be used only when the length of

grounding wires for those devices are the same.
Use a ground wire of UL1007 AWG16.

Use a thick wire for grounding the SmartAXIS and make the grounding wire as short as possible to make sure that noises from external

devices can be conducted to the ground effectively.
As shown below, external devices generating noise must be separated from the SmartAXIS and grounded with the D-type ground (class 3).

Make the length of the grounding wire for the SmartAXIS as short as possible.

SmartAXIS
D-type ground
(class 3)
Inverter or
similar external SmartAXIS
device
D-type ground
(class 3)
S A XI S P
M AR T R O
Inverter or
similar external
device
B
A
Length A = B
/ L U ' M FT9Y-B 1378
I TE SER S ANUAL
3: I
N STALLATI ON AN D
Inverter or
SmartAXIS similar external
device
W
I R I N G
3-13