FX
3U
Series Programmable Controllers
User’s Manual - Hardware Edition
168
9 Preparation for Wiring and Power Supply Wiring Procedures
9.1 Preparation for Wiring
9.1
Preparation for Wiring
9.1.1
Wiring procedures
Before starting wiring work, make sure that the main power is off.
1
Prepare the parts for wiring.
Prepare the solderless terminals and cables necessary for wiring.
→
For details, refer to Section 9.2.
2
Wire the power supply terminals.
In the case of AC power supply type
Connect the power supply to the terminals [L] and [N].
In the case of DC power supply type
Connect the power supply to the terminals [
] and [
].
Provide the power supply circuit with the protection circuit shown in this subsection.
→
For details, refer to Section 9.5.
3
Wire the ground terminal [
] at a grounding resistance of 100
Ω
or less
(Class D).
Connect a class D ground wire to the terminal.
→
For details, refer to Section 9.4 and 9.5.
4
Wire the input [X] terminals.
For a type (24V DC input type) common to sink/source input, select sink or source input by the
following connection.
In the case of AC power supply type
• For sink input, connect the [24V] and [S/S] terminals.
• For source input, connect the [0V] and [S/S] terminals.
In the case of DC power supply type
• For sink input, connect the [
] and [S/S] terminals.
• For source input, connect the [
] and [S/S] terminals.
Connect sensors and switches to the terminals.
→
For details, refer to Chapter 10.
5
Wire the output [Y] terminals.
Connect loads to the terminals.
→
For details, refer to Chapter 12.
9.1.2
Removal and installation of quick-release terminal block (Except for the FX
3U
-16M )
Removal
Unscrew the terminal block mounting screws [both right and left screws] evenly, and remove the
terminal block.
Installation Place the terminal block in the specified position, and tighten the terminal block mounting screws
evenly [both right and left screws].
Tightening torque 0.4 to 0.5 N
y
m
Do not thighten the terminal block mounting screws exceeding the specified torque. Failure to do
so may cause equipment failures or malfunctions.
*Pay attention so that the center of the terminal block is not lifted.
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