IAI America ACON-CY - Manual (Page 34)

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3. Installation and W
iring
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 supply connection
[2] Precautions regarding wiring method
Use a twisted cable to connection the 24 VDC external power supply.
Separate wiring of signal lines and encoders from power supply lines and power lines.
(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.
AC solenoid valves, magnet switches, relays
Measure: Install a surge absorber in parallel with the coil
Surge absorber
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.
Controller
Other
equip-
ment
Controller
Other
equip-
ment
Connect a cable of
the largest possible
size over the shortest
possible distance
Ground terminal
Ground resistance of 100 7 or less Do not link or connect the ground
line with other devices; ground it for
each controller.
Ground terminal
[1] Grounding must be made by ground resistance of 100 7
Moreover, the thickness of cable shall be 1.6 mm or thicker. 2
Noise from these sources can be eliminated by implementing the measures specified below.