Noise Reduction Techniques - Mitsubishi Electric MR-D30 Instruction Manual

3. SIGNALS AND WIRING

3.5 Noise reduction techniques

(1) Grounding shield of shielded cable
The following show measures against malfunctions of MR-D30 and servo amplifier for when the MR-D30
is installed near a device which generates excessive noise.
Ground a shield of the shielded cable near the MR-D30, and be careful that the cable after grounding
should not be affected by electromagnetic induction of the cable before grounding.
Partly remove the insulator of the shielded cable, and ground the exposed shielded part by making
contact in a large area with the cabinet. You can also use clamp metal parts as shown in figure 3.2.
Mask the painted internal wall of the cabinet that touches the clamp metal parts.
Figure 3.1 The shielded part to be exposed
Ground the shield of the signal input cable as close as possible (30 cm or less) to the MR-D30.
Shielded part
MR-D30
Inside the cabinet
30 cm or less
AD75CK
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Masked paint part
Figure 3.2 Grounding shields
Screw
Clamp fitting
Shielded cable