8. Connections of I/O Interface
8.4 Connecting with Card-sized I/O Card
126
(b) Input conditions
Use the input signal within the following condition ranges.
HR361
HR371
Input voltage when external contact is ON
6V or less
18V or more, 25.2V or less
Input current when external contact is ON
2mA or less
9mA or more
Input voltage when external contact is OFF
20V or more, 25.2V or less
4V or less
Input current when external contact is OFF
9mA or more
2mA or less
Tolerable chattering time (T1)
3ms or less
Input signal hold time (T2)
40ms or more(*1)
Input circuit operation delay time
3ms
≤
T3
=
.
.
T4
≤
20ms
Machine side contact capacity
30V or more, 16mA or more
(*1) Input signal hold time: 40ms or more is the guideline, and if not held for longer than the ladder
processing cycle time, the input signal will not be recognized.
Sink type
Source type
T1
T1
T1
T1
T2 T2
T3
T3
T4
T4
External signal
+24V
Internal signal
+5V
GND
GND
External signal
+24V
GND
Internal signal
+5V
GND