Справочник Пользователя для Mitsubishi Electronics MR-J2S- A

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13. OPTIONS AND AUXILIARY EQUIPMENT

(b) Reduction techniques for external noises that cause the servo amplifier to malfunction

If there are noise sources (such as a magnetic contactor, an electromagnetic brake, and many

relays which make a large amount of noise) near the servo amplifier and the servo amplifier may

malfunction, the following countermeasures are required.

Provide surge absorbers on the noise sources to suppress noises.

Attach data line filters to the signal cables.

Ground the shields of the encoder connecting cable and the control signal cables with cable clamp

fittings.

(c) Techniques for noises radiated by the servo amplifier that cause peripheral devices to malfunction

Noises produced by the servo amplifier are classified into those radiated from the cables connected
to the servo amplifier and its main circuits (input and output circuits), those induced
electromagnetically or statically by the signal cables of the peripheral devices located near the
main circuit cables, and those transmitted through the power supply cables.

Noises produced  
by servo amplifier

Noises transmitted  
in the air

Noise radiated directly  
from servo amplifier

Magnetic induction  
noise

Static induction  
noise

Noises transmitted  
through electric  
channels

Noise radiated from the  
power supply cable

Noise radiated from  
servo motor cable

Noise transmitted through  
power supply cable

Noise sneaking from  
grounding cable due to  
leakage current

Routes 4) and 5)

Route 1)

Route 2)

Route 3)

Route 7)

Route 8)

Route 6)

 

 

Instrument

Receiver

Servo 

amplifier

Servo motor

M

2)

2)

8)

1)

7)

7)

7)

5)

3)

4)

6)

3)

 Sensor  

 power  

 supply

Sensor