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3-10
Installation
KPCI-PIO24 User’s Manual
Figure 3-4
Contact-closure monitoring at a KPCI-PIO24 board input
System connections
Eliminating contact bounce
The effects of contact bounce may be eliminated by programming in your application software.
However, it is often desirable to eliminate contact bounce from the signal, using a de-bounce
circuit between the contacts and the KPCI-PIO24 input. Figure 3-5 shows a typical de-bounce
circuit that can be used with Form C contacts.
Figure 3-5
De-bounce circuit for an input of a KPCI-PIO24 board
External
Pull-up Resistor
Switch
10k
Ω
+5V
KPCI-PIO24
Board
Digital
Input
#
n
Digital
Common
GND
&
&
10 k
Ω
10 k
Ω
+5V
TTL
Compatible
AND Gate
Digital
Common
GND
To Digital Input
of a
KPCI-PIO24 Board
Содержание KPCI-PIO24
Страница 12: ...1 Overview...
Страница 14: ...2 General Description...
Страница 18: ...3 Installation...
Страница 29: ...4 Interrupts and I O Address Mapping...
Страница 35: ...5 Troubleshooting...
Страница 38: ...5 4 Troubleshooting KPCI PIO24 User s Manual Figure 5 1 Problem isolation flowchart...
Страница 56: ...A Specifications...
Страница 58: ...B Glossary...