Wiring; Wiring Precautions - Mitsubishi Electric MELSEC Q Series User Manual

4 SETUP AND PROCEDURE BEFORE STARTING THE OPERATION

4.4 Wiring

4.4.1 Wiring precautions

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This section provides wiring instructions and module connection examples.
External wiring must be noise-resistant as one of the conditions to fully exhibit the
Q64TC functions and configure a highly reliably system.
The instructions given below should be followed in wiring.
(1) Use separate cables with the AC control circuit and the Q64TC's external input
signals to avoid the influence of AC side surges and induction.
(2) Do not run the cables close to, or bundle them with, the main circuit and high-
voltage cables and the load cables from other than the programmable controller.
Always keep temperature sensors at least 100mm(3.94inch) away from the main
circuit cables and AC control circuit.
Fully keep them away from high-voltage cables and circuits which include higher
harmonics, e.g. inverter load's main circuit.
Failure to do so will make the cables susceptible to noise, surges and induction.
(3) Ground the shield wires or shield cables to FG of the programmable controller.
Note that it may be better to establish a ground on the external side depending on
the external noise conditions.
(4) When you want the equipment to conform with the EMC Directive/Low Voltage
Directive, refer to "Conformance with the EMC Directive and Low Voltage
Directive" in this manual and carry out wiring.
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