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4-4SectionI/O Connections
43
AC Input Units
COM
Contact
output
IN
AC input
COM
AC Switching
IN
AC input
Prox.
switch
main
circuit
Caution When using Reed switch as the input contacts for AC Input Units, be sure the
allowable
current of the switch is at least 1 A. Using switches with lower capaci
-
ties may cause the contacts to fuse due to surge current.
A
fuse placed in the output circuit
will protect the output element, circuit board,
etc.,
in the event of a short circuit in the output circuit. Although some transistor
Output
Units and T
riac Output Units have a built-in fuse, it is recommended
that
you connect an external fuse to each Output Unit for extra safety and ease of
maintenance.
Output Units
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