Mitsubishi Electric MELCEC Q Series User Manual page 159

9. LOADING AND INSTALLATION
(2)
CAUTION
Wiring I/O equipment
Do not install the control lines or communication cables together with the main
circuit lines or power cables.
Keep a distance of 100mm or more between them.
Failure to do so may result in malfunction due to noise.
(a) The applicable wire size for a terminal block connector is 0.75 to 2mm
recommended to use wire of 0.75mm
(b) Run the input line and output line away from each other.
(c) Separate the I/O signal lines (including common line) at least 100mm away from
the main circuit line carrying high voltage and large current.
(d) If it is not possible, use a batch shielding cable and ground it on the
programmable controller side.
However, ground it on the opposite side in some cases.
Programmable
controller
Input
Output
NOTE
(e) When ducts are used for wiring, securely ground them.
(f) Separate the 24VDC I/O wires from the 100VAC and 200VAC lines.
(g) In a long distance wiring of 200m or longer, leak current due to capacitance may
cause failure.
(h) As protective measures against lightning surges, separate the AC wiring from
the DC wiring and connect a lightning surge absorber as shown in (1) (i).
Failure to do so increases the risk of I/O equipment failure due to lightning.
2
for easy use.
Shielded cable
Shielded jacket
DC
9 - 27
2
RA
. It is