IAI America ACON-SE - Manual (Page 34)

24
3. Installation and W
iring
[2] Precautions regarding wiring method
(2) Noise sources and elimination
[1] AC solenoid valves, magnet switches and relays
Measure: Install a surge absorber in parallel with the coil.
[2] DC solenoid valves, magnet switches and relays
Measure: Install a diode in parallel wi th the coil or use a built-in diode type.
If DC power is used, exercise due caution because the diode, internal
controller parts and/or DC power supply may be damaged if the diode is
installed in the wrong polarities.
Å Surge absorber
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 bey ond the length of the supplied cable, contact IAI.
Noise generates from many sources, but the most comm on sources of noise you should consider when designing
a system are solenoid valves, magnet switches and relays.
Noise from these sources can be eliminated by implementing the measures specified below.
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.