32
(f) Note on using the 24 VDC output of the A1S62PN power supply
module.
CAUTION
Do not connect multiple power supply modules to one
module in parallel. The power supply modules may be
heated, resulting in a fire or failure.
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 module
24VDC
24VDC
24VDC
External power supply
Power supply
unit
Power supply
unit
Power supply
unit
I/O module
(g) 100 V AC, 200 V AC and 24 V DC wires should be twisted as dense as
possible. Connect the modules with the shortest distance.
Also, to reduce the voltage drop to the minimum, use the thickest wires
possible (maximum 2mm
2
).
(h) Do not bind 100VAC and 24VDC wires together with main circuit (high
tension and large current) wires or I/O signal wires (including common
line) nor place them near each other. Provide 100mm (3.94 inch)
clearance between the wires if possible.
(i) As a countermeasure to power surge due to lightening, connect a surge
absorber for lightening as shown below.
Lightning surge absorbe
AC
E1
E1
E1
Programmable
controller
I/O
device
E2
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