8. Connections of I/O Interface
8.3 Connecting with Scan I/O Card
120
(5) Digital input (CF31)
A source type input circuit corresponding to source output is shown.
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△
△
△
△
△
△
△
Sink type
Source type
(Machine side)
(Machine side)
24VDC 24VDC
0V(RG)
0V(RG)
0V(RG)
HR3 7
HR3 7
2.2k
Ω
2.2k
Ω
2.2k
Ω
2.2k
Ω
CF31
CF31
COM
COM
Control
circuit
Control
circuit
Input conditions
Set so the input conditions are within the ranges shown in the following conditions.
Sink type
Source type
1 Input voltage at external contact ON
6V or less
18V or more, 25.2V or less
2 Input current at external contact ON
9mA or more
3 Input voltage at external contact OFF
20V or more, 25.2V or less
4V or less
4 Input current at external contact OFF
2mA or less
5 Tolerable chattering time
3ms or less (Refer to T1 below)
6 Input signal holding time
40ms or more (Refer to T2 below)
7 Input circuit operation delay time
3ms
≤
T3 T4
≤
16ms
8 Machine side contact capacity
30V or more, 16mA or more
(Note)
Input signal holding time: 40ms or more as a guideline. The input signal can only be confirmed if held
longer than the ladder process cycle time.
T1
T1
T1
T1
T2
T2
T4
T4
T3
T3
External signal
24VDC
Internal signal
+5V