YASKAWA MOTIONPACK-110 Descriptive Information page 218

9.11.1 PREVENTION OF INTERFERENCE BETWEEN WIRES (Cont'd)
Be sure that wires in different categories are not located close to each other. For q
category ]] wires, the following precautions must be taken.
• They should not be laid in parallel to or close to the wires of category !.
• They should not be laid near parts or units which generate noise. They should not be
laid in parallel to the wires for these parts or units.
9.11.2 INSERTION OF SURGE SUPPRESSORS INTO COILS
Be sure to connect the surge suppressors to the coils of relays, contactors and solenoids.
Examples of suppressors:
• For 200 VAC:
Surge Suppressor CRh0500 (Okaya Denki Co.)
• For 100 VAC: Surge Suppressor AU1201 (Okaya Denki Co.) t_
• For 24 VDC: Diode 1S2462 (Toshiba)
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9.11.3 USE OF INSULATING TRANSFORMERS AND LINE FILTERS
Be sure to connect insulating transformers and line filters to control power supply lines. In
this case, the following precautions should be taken.
• Separate the primary side or the secondary side of insulating transformer or line filter. I
• Ground the insulating transformer or line filter using a large diameter wire running the
1
shortest possible distance.
• Make wiring as short as possible to the input terminals of insulating transformer or
line filter to prevent noise induction.
9.11.4 GROUNDING METHOD
One-point grounding (100m or less) should be made using wires larger than 2 mm z. If the I
servomotor is to be insulated from machine, be sure to ground the motor. Fig. 9.27 shows
'IE
the grounding method. Connect a single line from each unit or module to the grounding
point of the control panel, and then make one-point grounding (100Q or less) from there.
CRT M_CRO
DC CONTROL PC MOTION AXIS MODULE Servopack
POWER STATION MODULE MODULE
_- 100.QOR LESS
Fig. 9.27 Grounding Method
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