Mitsubishi 13J851, Руководство пользователя

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43
If the 24 VDC output capacity is insufficient for one power supply
module, supply 24 VDC from the external 24 VDC power supply as
shown below:
I/
O m
o
dule
24VDC
24VDC
24VDC
External power supply
Power supply
m
odule
P
ower s
upply
mo
d
ul
e
P
ower supply
mo
d
ul
e
I/O m
odule
(g) 100VAC, 200VAC, and 24VDC wires should be twisted as tightly as
possible, and connect the modules at the shortest distance between
them.
To minimize voltage drop, use thick wires (MAX. 2mm
2
) where possible.
(h) Do not bind 100VAC and 24VDC wires together with main circuit (high
tension and large current) wires or I/O signal lines (including common
line) nor place them near each other. Provide 100mm (3.94 inch)
clearance between the wires if possible.
(i) As a measure against surges caused by lightning, insert a lightning
surge absorber as shown below.
Lightning surge absorber
AC
E1 E1
E1
PLC/IO
device
E2
POINT
(1) Provide separate grounding for the lightning surge absorber (E1) and the
PLC (E2).
(2) Select a lightning surge absorber whose maximum allowable circuit
voltage is higher than the circuit voltage at the maximum power supply
voltage.
(2) Wiring to I/O device
(a) The solderless terminal with insulation sleeve is inapplicable to a
terminal block.
It is advisable to cover the wire connection part of a terminal with a
mark tube or insulation tube.