Wiring - Mitsubishi Electric MELSEC-FX3S Series Manual

FX /FX /FX /FX /FX
3S 3G 3GC 3U 3UC
FX -4DA (4-channel Analog Output)
3U
3.

Wiring

This chapter describes wiring of the FX
Observe the following cautions wiring the FX
WIRING PRECAUTIONS
• Make sure to cut off all phases of the power supply externally before attempting wiring work.
Failure to do so may cause electric shock or damage 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 burn
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 on the main unit.
Do not use common grounding with heavy electrical systems.
• 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 observe the following precautions in order to prevent malfunctions under the influence of noise:
- Do not bundle the power line or shield of the analog input/output cable 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
100mm (3.94") or more away from the main circuit, high-voltage line, or load line.
- Ground the shield of the analog input/output cable at one point on the signal receiving side.
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.
PLC User's Manual - Analog Control Edition
-4DA.
3U
3U
-4DA.
3 Wiring
A
B
C
D
E
F
G
H
I
J
E-9