IAI America PCON-CF - Manual (Page 40)

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3. Installation and Noise Elimination
[2] Precautions regarding wiring method
Use a twisted cable for connection to the 24-VDC external power supply.
Separate the controller cables from high-power lines such as a cable connecting to a power circuit. (Do not
bundle together the controller cables with high-power lines or place them in the same cable duct.)
When extending the supplied motor cable or encoder cable, consult IAI’s Technical Support.
(2) Noise sources and elimination
Among the numerous noise sources, solenoid valves, magnet switches and relays are of particular concern
when building a system. Noise from these sources can be eliminated by implementing the measures specified
below.
[1] AC solenoid valves, magnet switches and relays
Measure: Install a surge absorber in parallel with the coil.
Å Point
Install a surge absorber to each coil over a minimum wiring
length.
Installing a surge absorber to the terminal block or other part will
be less effective because of a longer distance from the coil.
3.3 Noise Elimination and Grounding
This section explains how to eliminate noise in the use of the controller.
(1) Wiring and power supply
[1] Provide a dedicated class D grounding using a wire with a size of 2.0 to 5.5 mm
2
or larger.
Class D grounding Good Avoid this grounding method.
Controller
Other
equipment
Controller
Other
equipment
Use a cable of a
maximum possible
size and keep the
wiring length at a
minimum.
Metal frame