51
The circuit below should NOT be used for I/O devices having a voltage output.
0 V
Output
+
COM
Voltage output
IN DC input
Sensor
Power
Supply
AC Input Units
COM
Contact output
IN AC input
COM
AC Switching
IN AC input
Prox-
imity
switch
main
circuit
Note When using a reed switch as an input contact for an AC Input Unit, the allowable
current of the switch must be 1 A or greater. The contacts will be fused due to
inrush current if reed switches with a lower current capacity are used.
Output Units 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 Units have
a built-in fuse, it is recommended that you connect an external fuse to each Out-
put Unit for extra safety and ease of maintenance.
I/O Connections Section 4-4
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