IAI ERC3, Instruction Manual

Page: 37 / 188

Chapter 1 Specifications Check
1.8 Noise Elimination and Mounting Method
29
1.8 Noise Elimination and Mounting Method
(1) Noise Elimination Grounding (Frame Ground)
(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.
Earth Terminal
Class D grounding
(Formerly Class-III grounding :
Grounding resistance at 100

or less)
Copper wire: Connect a ground
wire with a diameter of 1.6 mm
(2mm
2
: AWG14) or larger.
Connect the ground line to
the FG terminal block on the
controller unit.
Gateway Unit
Do not share the ground wire with or connect
to other equipment. Ground each controller.
Controller
Other
equipment
Controller
Other
equipment
Other
equipment
Surge absorber
Relay
coil
Relay coil
R
C
+24V 0V
+24V 0V
+ -
ME0302-4A