2-16
S Use a separate grounding system.
S Attach a surge absorber or diode to the device or parts generating the noise, as shown in the fol-
lowing diagram.
AC relays or AC valves DC relays
AC
power
supply
Surge absorber
DC
power
supply
Diode
~
Note Select withstand pressure and current suitable for the load.
2-3-3 Terminal Block Wiring
Use crimp terminals and firmly tighten to the appropriate torque.
H Terminal Block Layout
Power supply input
Control input
Func-
tion
Earth
Protect
Earth
Control output
H Power Supply Input Wiring
D Wiring Method
Ground to 100 Ω
or less
Terminal screw size: M3.5
Tightening torque: 0.8 N S m
Func-
tion
Earth
Protect
Earth
100 to 240 V AC
50/60 Hz
~
Design Chapter 2
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