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3. Installation / Wiring (<strong>common</strong>) <br />
3.3 Wiring Specifications<br />
3.3.1 Wiring Precautions<br />
1 Grounding<br />
Amplifier groundingGround the amplifier using the CN1-4 pin(earth). Use single point<br />
grounding with at least AWG180.75 mm 2 wire. <br />
Motor frame grounding: If the motor is grounded through the frame, then Cf x dv/dt current<br />
flows from the PMW power part of the servo amplifier through the motor floating capacitance<br />
(Cf). To prevent the effects of this current, use single point grounding for the motor frame and<br />
the servo amplifier ground. Use at least AWG18 (0.75mm 2 ) wire for grounding the motor.<br />
Grounding the wiring: If the motor is wired to a metal conduit or metal box, the metal must be<br />
grounded. Use single-point grounding.<br />
2) Noise protection<br />
Follow the instructions below to prevent malfunctions due to noise.<br />
The noise filter, amplifier and the host controller should be placed at a minimum distance.<br />
Apply a surge absorber circuit to coils such as relays, electromagnetic contacts, induction<br />
motors and brake solenoids, etc.<br />
Do not enclose the power lines, the motor lines, and the signal lines in the same wire<br />
conduit; they are not intended to be bundled together.<br />
If there are large noise sources such as electric welding machines or electric discharge<br />
machines nearby, apply a noise filter for the power line and the input circuit.<br />
Do not bundle the primary and secondary wiring of the noise filter together.<br />
3) Wiring<br />
Perform wiring only when power is cut off. Carefully verify that the wiring is correct, as faulty<br />
wiring can cause damage to the device.<br />
4) Cables for wiring<br />
Use the specified sizes and lengths for all cables.<br />
5) Emergency stop circuit<br />
Be sure to install an external emergency stop circuit that can stop the device and cut off the power<br />
instantaneously.<br />
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