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MELSEC-Q
4 SETUP AND PROCEDURES BEFORE OPERATION
4.4 Wiring
The wiring precautions and examples of module connection are provided below.
4.4.1 Wiring precautions
In order to optimize the functions of the A/D converter module and ensure system
reliability, external wiring that is protected from noise is required.
Please observe the following precautions for external wiring:
(1) Use separate cables for the AC control circuit and the external input signals of the
Q64AD-GH to avoid the influence of the AC side surges and inductions.
(2) Use separate cables for the AC control circuit and the external input signals and
external supply power of the Q62AD-DGH to avoid the influence of the AC side
surges and inductions.
(3) Do not mount the cables close to or bundle them with the main circuit line, a high-
voltage cable or a load cable from other than the PLC.
This may increase the effects of noise, surges and induction.
(4) Perform an one-point grounding for shielded lines and the shields of sealed
cables.
(5) A solderless terminal with insulating sleeve cannot be used for the terminal block.
Covering the cable-connection portion of the solderless terminal with a marked
tube or an insulation tube is recommended.
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