Noise Reduction Techniques - Mitsubishi Electric MELSERVO MR-J5 Series User Manual

Ac servo system

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Noise reduction techniques

This section provides information on measures that prevent the servo amplifier malfunctioning when it is installed next to

peripheral devices that emit a large amount of noise.

Ground shielded cables close to the servo amplifier. Ensure that the part of the cable before the grounding point does not

induce electromagnetic noise to the section of the cable after the grounding point. Strip part of the shielded cable, then ground

the exposed portion of the cable on a large surface of the cabinet. A metal cable clamp can also be used to ground the cable

(shown below). Mask the painted internal wall of the cabinet that touches the cable clamp.

• Exposed shield

Shielded part

• Grounding the shield

Masked paint

Ground both ends of the cable of the CN3 safety signal with the cable clamp. The shield length from the servo amplifier to the

cable clamp should be within 30 cm.

For the grounding of the shield of the I/O signal cable, SCC 15-F (Phoenix Contact) can be used. Refer to the following for

Page 410 SCC 15-F Shield connection clamp

10 USING FUNCTIONAL SAFETY [G] (MR-J5-_G_-HS_)

10.9 Noise reduction techniques

Clamp fitting

Shielded cable

30 cm or less