IAI America PCON-PO - Manual (Page 32)

20
3. Installation and W
iring
[2] Cautions on wiring method
Use a twisted cable to connect the 24-VDC external power supply.
Separate the controller wiring from high-power lines of motive power circuits, etc. (Do not tie them together or place in
the same cable duct.)
If you want to extend the motor or encoder cable beyond the length of the supplied cable, contact IAI.
(2) Noise sources and elimination
Noise generates from many sources, but the most common sources of noise you should consider when designing a
system are solenoid valves, magnet switches and relays. Noise generation from these components can be prevented
by the method explained below.
AC solenoid valves, magnet switches, relays
Method --- Install a surge absorber in parallel with the coil
Point
Connect to each coil over the shortest possible wiring distance.
When a surge absorber is installed on the terminal block, etc., its noise
elimination effect will decrease if the distance from the coil is long.
3.3 Noise Elimination Measures and Grounding
The following explains the noise elimination measures that should be taken when using this controller.
(1) Wiring and power connection
[1] Provide dedicated class-D grounding using a grounding wire with a size of 2.0 to 5.5 mm 2 or larger.
Controller
Other
equip-
ment
Controller
Other
equip-
ment
Connect a cable of
the largest possible
size over the shortest
possible distance
Metal
enclosure
. n r e t t a p s i h t d i o v A d o o G g n i d n u o r g D - s s a l C