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CHAPTER 5 CONNECTION OF I/O INTERFACE
5.4 Scan I/O
71
(5) Digital input (CF31)
A sink type input circuit corresponding to the machine side sink output, and a source type input
circuit corresponding to the machine side source output are shown below.
+24V
2.2k
2.2k
HR357
GND
(Machi ne side)
2.2k
2.2k
Cont rol
circu it
HR347
(Machi ne side)
GND
GND
+24V
Sink type
Source type
Cont rol
ci rcu it
CF30
COM
CO M
CF30
Input conditions
Use the input signal within the following condition ranges.
Sink type
Source type
1
Input voltage when external contact is ON
6V or less
18V or more
2
Input current when external contact is ON
9mA or more
3
Input voltage when external contact is OFF
20V or more
4V or less
4
Input current when external contact is OFF
2mA or less
5
Tolerable chattering time
3ms or less (Refer to T1 below)
6
Input signal hold time
40ms or more (Refer to T2 below)
7
Input circuit operation delay time
3ms
≤
T3
=
.
.
T4
≤
20ms
8
Machine side contact capacity
+30V or more, 16mA or more
Do not apply voltages other than those indicated in this manual on the connector. Doing
so may lead to destruction or damage.
T1
T1
T1
T1
T2
T2
External sign al
+24V
+5V
Internal sign al
T3
T4
T3
T4
CAUTION
Input signal hold time: 40 ms or more is the guideline, and if not held for longer
than the ladder processing cycle time, the input signal will not be recognized.