Do Not Wire Vacant Terminals Externally Doing So May Damage The Product - Mitsubishi FX3U SERIES User Manual

FX Series Programmable Controllers
3U
User's Manual - Hardware Edition
WIRING PRECAUTIONS
• Do not supply power to the [24+] and [24V] terminals (24V DC service power supply) on the main unit or extension
units.
Doing so may cause damage to the product.
• Perform class D grounding (grounding resistance: 100 Ω or less) to the grounding terminal on the main unit and
extension units with a wire 2 mm
Do not use common grounding with heavy electrical systems (refer to Section 9.4).
• Connect the DC power supply wiring to the dedicated terminals described in this manual.
If an AC power supply is connected to a DC input/output terminal or DC power supply terminal, the PLC will burn
out.
• Do not wire vacant terminals externally.
Doing so may damage the product.
• When drilling screw holes or wiring, make sure cutting or wire debris does not enter the ventilation slits.
Failure to do so may cause fire, equipment failures or malfunctions.
• Make sure to properly wire the FX
the following precautions.
Failure to do so may cause electric shock, a short-circuit, wire breakage, or damage to the product.
- The disposal size of the cable end should follow the dimensions described in this manual.
- Tightening torque should be between 0.5 and 0.8 N
• Observe the following items when wiring to the European terminal board.
Failure to do so may cause electric shock, a short-circuit, disconnection, or damage to the product.
- The disposal size of the cable end should follow the dimensions described in this manual.
- Tightening torque should be between 0.22 and 0.25 N
- 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.
• Make sure to properly wire the FX Series terminal blocks in accordance with the precautions below in order to
prevent electric shock, a short-circuit, wire breakage, or damage to the product:
- The disposal size of the cable end should follow the dimensions described in this manual.
- Tightening torque should be between 0.5 and 0.8 N
This chapter explains the procedures for installing the PLC in enclosure.
The procedures for wiring the input and output terminals are described in the following chapters.
• Installation location and layout in enclosure
• Procedures for connecting extension devices
• Procedures for power supply wiring
2
or thicker.
/FX /FX Series extension equipment to the main unit in accordance with
0N 2N 3U
m.
•
• m.
m.
•
8 Installation In Enclosure
125
1
2
3
4
5
6
7
8
9
10