How can I minimize Noise?  

There are the following three main methods to take measures against electrical noise.

Noise Suppression

• When relays or electromagnetic switches are used, use a noise filter or CR circuit to suppress the
  surge generated by these devices.
• Cover the controller by a metal plate such as aluminum. This effectively shields the electricalnoise emitted by the controller.

Prevention of Noise Propagation

• Connect a noise filter to the AC input side of the DC power supply.
• Keep power lines, such as motor and power supply cables, at least 200 mm (3.94 in.) away from signal lines, and do not bundle or parallel them. If a power cable and a signal cable must cross, cross them at right angles.
• Use shielded twisted pair cables for power lines and signal lines
• Keep cables as short as possible without coiling and bundling extra lengths.
• Grounding multiple points will increase the effectiveness of blocking electrical noise because the  impedance at the grounding points will be reduced. However, ground them so that a potential difference does not occur among the grounding points. I/O signal cables that include a ground wire are available in Oriental Motor products.
• To ground a shielded cable, use a metal cable clamp that can maintain contact with the entire circumference of the shielded cable, and ground as close to the product as possible.

Suppression of the Effect of Noise Propagation

Wrap the noise propagating cable around a ferrite core. This will prevent the propagated noise from
entering the controller or from being emitted from the controller. The frequency band in which an
effect by the ferrite core can be seen is generally 1 MHz or more. Check the frequency characteristics of the ferrite core used. To increase the noise attenuation effect of the ferrite core, wrap the cable several more times