Wiring - Mitsubishi MELSEC-F FX3U Series User Manual

FX /FX Series PLC User's Manual - Analog Control Edition
3U 3UC
FX -4AD-TC-ADP (4-channel Thermocouple Data Input)
3U
3.

Wiring

This chapter describes wiring of TC-ADP.
Observe the following caution to wire TC-ADP.
WIRING PRECAUTIONS
• Make sure to cut off all phases of the power supply externally before starting the wiring work.
Failure to do so may cause electric shock and damages to the product.
WIRING PRECAUTIONS
• 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 be
burnt out.
• Do not wire vacant terminals externally.
Doing so may damage the product.
• Perform class D grounding (grounding resistance: 100Ω or less) to the grounding terminal in the main unit.
Do not connect the grounding terminal at the same point as a heavy electrical system.
• During the wiring work, do not let cutting chips and wire chips enter ventilation slits.
• Make sure to observe the precautions below in order to prevent any damage to a machine or any accident which
might be caused by abnormal data written in the PLC due to the influence of noise:
- Do not lay close or bundle with the main circuit, high-voltage power line, or load line.
Otherwise effects of noise or surge induction are likely to take place.
Keep a safe distance of more than 100 mm (3.94") from the above when wiring.
- Ground the shield wire or shield of a shielded cable at one point on the PLC. However, do not ground at the
same point as high voltage lines.
• Observe the following items to wire the lines to the European terminal board. Ignorance of the following items may
cause electric shock, short circuit, disconnection, or damage of the product.
- The disposal size of the cable end should be 9 mm (0.35").
- Tightening torque should be between 0.22 to 0.25 N
- Twist the end of strand wire and make sure there is no loose wires.
- Do not solder-plate the electric wire ends.
- Do not connect electric wires of unspecified size or beyond the specified number of electric wires.
- Fix the electric wires so that the terminal block and connected parts of electric wires are not directly stressed.
m.
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3 Wiring
2.5 Temperature Measurement
F-9
A
B
C
D
E
F
G