FX3U Series Programmable Controllers
User’s Manual - Hardware Edition
224
13 Examples of Wiring for Various Uses
13.1 Notes about Examples of Wiring
13.1 Notes about Examples of Wiring
The examples of wiring are given under the following conditions.
• The input/output numbers are the actual numbers on the program. (They may differ from the numbers
shown on the product terminals.)
• Some examples show wiring to be used for transistor output. They are examples of wiring for the transistor
output types of input/output powered extension units/blocks.
• Product input/output specifications
Check the product input/output specifications when using any example of wiring.
- Products only for sink input and products both for sink input and for source input are available.
- Products for sink output and products for source output are available.
• The examples of programming (applied instructions) are given based on the allocation of the input/output
numbers for wiring.
→ For the applied instructions, refer to the Programming Manual.
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
2
or thicker.
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
0N/FX2N/FX3U Series extension equipment to the main unit in accordance with
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
•
m.
• 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
•
m.
- 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
•
m.
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