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3. SIGNALS AND WIRING

3.10 Grounding

WARNING Ground the servo amplifier and servo motor securely.

To prevent an electric shock, always c onnect the protective earth (PE) term inal of

the servo amplifier with the protecti ve earth (PE) of the control box.

The servo amplifier switches the power transistor on-off to supply power to the servo motor. Depending on

the wiring and ground cablerouting, the servo amplifier may be affected by the switching noise (due to

di/dt and dv/dt) of the transistor. To prevent su ch a fault, refer to the following diagram and always

ground.

To conform to the EMC Directive, refer to the EMC Installation Guidelines (IB(NA)67310).

Control box
Servo amplifier
L1
L2
L3
L11
L21
CN1A CN1B
Line filter
NFB MC
Protective earth(PE)
CN2
U
V
W
Outer
box
Servo motor
Ensure to connect it to PE
terminal of the servo amplifier.
Do not connect it directly to
the protective earth of
the control panel.
Encoder
M
U
V
W
(Note)
Power supply
3-phase
200 to 230VAC,
1-phase
230VAC or
1-phase
100 to 120VAC
Note. For 1-phase 230VAC, connect the power supply to L1 L2 and leave L3 open.
Programmable
controller
There is no L3 for 1-phase 100 to 120VAC power supply.