Wiring - Mitsubishi Electric FX3U-232-BD User Manual

FX Series PLC User's Manual - Data Communication Edition
N:N Network
4.

Wiring

This chapter explains the wiring.
WIRING PRECAUTIONS
• Make sure to cut off all phases of the power supply externally before attempting installation or wiring work.
Failure to do so may cause electric shock or damage to the product.
• Make sure to attach the terminal cover, offered as an accessory, before turning on the power or initiating
operation after installation or wiring work.
Failure to do so may cause electric shock.
WIRING PRECAUTIONS
• Make sure to observe the following precautions in order to prevent any damage to the machinery or accidents
due to abnormal data written to the PLC under the influence of noise:
1) Do not bundle the main circuit line together with or lay it close to the main circuit, high-voltage line or load line.
Otherwise, noise disturbance and/or surge induction are likely to take place. As a guideline, lay the control line
at least 100mm (3.94") or more away from the main circuit or high-voltage lines.
2) Ground the shield wire or shield of the shielded cable at one point on the PLC. However, do not use common
grounding with heavy electrical systems.
• Make sure to properly wire the terminal block in accordance with the following precautions.
Failure to do so may cause electric shock, equipment failures, a short-circuit, wire breakage, malfunctions, or
damage to the product.
- The disposal size of the cable end should follow the dimensions described in the manual.
- Tightening torque should follow the specifications in the manual.
- Tighten the screws using a Phillips-head screwdriver No.2 (shaft diameter 6mm (0.24") or less). Make sure
that the screwdriver does not touch the partition part of the terminal block.
• Make sure to properly wire to the terminal block (European type) in accordance with the following precautions.
Failure to do so may cause electric shock, equipment failures, a short-circuit, wire breakage, malfunctions, or
damage to the product.
- The disposal size of the cable end should follow the dimensions described in the manual.
- Tightening torque should follow the specifications in the manual.
- Twist the end of strand wire and make sure that there are no loose wires.
- Do not solder-plate the electric wire ends.
- Do not connect more than the specified number of wires or electric wires of unspecified size.
- Affix the electric wires so that neither the terminal block nor the connected parts are directly stressed.
4.1 Wiring Procedure
1
Preparing for wiring
Prepare cables and terminal resistors required for wiring.
2
Turning OFF the power to the PLC
Before starting any wiring work, make sure that the PLC power is OFF.
3
Connecting the power supply (FX
Connect the power supply to the 24V DC power terminal.
4
Wiring communication equipment
Connect communication equipment operating in accordance with RS-485.
B-18
-485ADP only)
0N
4.1 Wiring Procedure
For details, refer to Section 4.2.
For details, refer to Section 4.3.
4 Wiring