Specifications

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
(Machine side)
2.2k
2.2k
Control
circuit
HR347
(Machine side)
GND
GND
+24V
Sink type Source type
Control
circuit
CF30
COM
COM
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 signal
+24V
+5V
Internal signal
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.