User`s manual

Installation Wiring
9 – 20
● Power supply cables (110 V AC, 230 V AC) and DC cables should be bundled in separated
strings. Bundling can be done by cable twisting or wire straps. Connect the modules with
the shortest distance.
● To reduce the voltage drop to the minimum, use the thickest wires possible (max. 2 mm
2
)
for 110 V AC, 230 V AC and 24 V DC wires.
● Do not bundle the 110 V AC and 24 V DC wires with, or run them close to, the main circuit
(high voltage, large current) and I/O signal lines (including common line). Reserve a distance
of at least 100 mm from adjacent wires.
● As measures against surge (e.g. caused by lightning), connect a surge absorber for lightning:
QH00043C_UK
Fig. 9-19: Connecting a lightning surge absorber
E
CAUTION:
● Separate the ground of the surge absorber for lightning (E1) from that of the
programmable controller (E2).
● Select a surge absorber for lightning whose power supply voltage does not exceed
the maximum allowable circuit voltage even at the time of maximum power supply
voltage elevation.
AC
E2
PLC
I/O devices