IAI R-unit RSEL, Instruction Manual, Page: 49 / 844

Chapter 1 RSEL
System
1.4 Installation
1-11
ME0392-4C
1.4.3 Noise countermeasures and mounting method
(1) Grounding for noise countermeasures (frame ground)
[24V DC]
(2) Protective Grounding (Protective Earthing)
[200V 3-Phase Type]
[200V Single-Phase Type]
Annealed copper wire: 1.6 mm
diameter
Connect with a ground wire of
(2 mm 2 : AWG14)
Ground terminal
Grounding resistance: 100 Ω or less
(Class D grounding construction)
Connect the ground wire to the
FG terminal block of the main
body.
Push in the square hole with a
screwdriver or the like to connect.
Controller
Controller
Grounding wires should not be connected
in common with other devices and
separate controllers should be grounded.
1.4 Installation
ME0392-4C
1-12
(3) Notes on wiring method
1) Have the 24V DC power supply wires twisted.
2) Separate the wiring of signal wires and encoders from power supply lines and power
lines.
(4) Noise sources and noise prevention
For the same power supply path and power supply device in the same device, take
measures against noise.
Countermeasure examples for noise sources are
shown below.
1) AC solenoid valve / magnetic switch / relay
[Measure] Install an anti-noise device in parallel
with the coil.
2) DC solenoid valve / magnetic switch / relay
[Measure] Install a diode in parallel with the coil or
use the diode built-in type.
Anti-noise device
Relay
coil
Relay coil