Mitsumi electronic MR-J3- A Manual De Usuario

 

 

3 -  78 

3. SIGNALS AND WIRING 

 
3.12 Grounding 

WARNING 

Ground the servo amplifier and servo motor securely. 
To prevent an electric shock, always connect the protective earth (PE) terminal 
(terminal marked   ) of the servo amplifier with the protective 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 cable routing, the servo amplifier may be affected by the switching noise (due to di/dt and 
dv/dt) of the transistor. To prevent such 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). 

(Note)

Power supply

W

V

U

Ensure to connect it to PE

terminal of the servo amplifier.

Do not connect it directly to the 

protective earth of the control 

panel.

Control box

Servo motor

M

U
V

W

Encoder

CN2

Servo amplifier

L

11

L

1

L

2

L

3

L

21

CN1

Protective earth (PE)

Outer

box

MC

NFB

Line

 filter

Pr

og

ra

m

m

ab

le

cont

ro

ller

 

Note. For 1-phase 200 to 230VAC or 1-phase 100 to 120VAC, connect the power supply to L

1

L

2

 and leave L

3

 open. 

There is no L

3

 for 1-phase 100 to 120VAC power supply. For the specification of power supply, refer to section 1.3.