IAI America SCON-CA - Manual (Page 44)

Chapter 1 Specifications Check
34
1.7 Noise Elimination and Mounting Method
(1) Noise Elimination Grounding (Frame Ground)
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(2) Precautions regarding wiring method
1) Wire is to be twisted for the power supply.
2) Separate the signal and encoder lines from the power supply and power lines.
(3) Noise Sources and Elimination
Carry out noise elimination measures for electrical devices
on the same power path and in the same equipment. The
following are examples of measures to eliminate noise
sources.
1) AC solenoid valves, magnet switches and relays
[Measure] Install a Surge absorber parallel with the
coil.
2) DC solenoid valves, magnet switches and relays
[Measure] Mount the windings and diodes in parallel.
Select a diode built-in type for the DC relay
Controller
Do not share the ground wire with or
connect to other equipment. Ground
each controller.
Earth Terminal
Grounding resistance at 100��or less
Field wiring terminals shall be
marked with wire range (More
than AWG14), conductor
material (Cu), insulation
temperature rating (More than
60�C) and tightening torque
(1.0 ~ 1.2N•m).
Connect using FG connection
terminal on the main unit.
Controller
Other
equipment
Controller
Other
equipment
Other
equipment
0V
R
C
+24V
0V +24V
Relay
coil
Relay coil
Surge absorber