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MELSEC-Q
4 SETUP AND PROCEDURES BEFORE OPERATION
4.4 Wiring
The wiring precautions and examples of module c onnection are provided below.
4.4.1 Wiring precautions
In order to optimize the functions of the A/D c onverter module and ensure system
reliability, external wiring that is protecte d from noise is required.
Please observe the following precautions for ex ternal wiring:
(1) Use separate cables for the AC control circ uit and the external input signals of the
Q64AD/Q68ADV(I) to avoid the influence of the AC side surges and inductions.
(2) Do not mount the cables close to or bundle t hem with the main circuit line, a high-
voltage cable or a load cable from other t han the PLC. This may increase the
effects of noise, surges and induction.
(3) Perform an one-point grounding for shie lded lines and the shields of sealed
cables.
(4) A solderless terminal with insulating sl eeve cannot be used for the terminal block.
Covering the cable-connection portion of the s olderless terminal with a marked
tube or an insulation tube is recommended.