Introduction
1-5
Figure 1-3
Better implementation of monitoring a digital input
In Figure 1-3, the digital input is guaranteed to be pulled high because of the 10k
ohm resistor. This implementation would work on both the old and new design of the
PIO-24 and is the preferred implementation to avoid dependence on a specific level of
input load current.
Applications
Applications for the PIO-24 include all parallel digital I/O activities such as
communicating with peripherals, operating relays, reading switch inputs, etc.
Keithley Instruments applications engineers welcome inquiries into installation,
operation, and applications of the PIO-24. To inquire, dial (440) 248-0400 and ask for
technical support.
Accessories
Accessory products available for the PIO-24 include the SFC-37 Mating Connec-
tor, the C-1800 Flat Cable, the STA-U Screw Connector Panel, and the mechanical
and solid-state relay board Models ERB-24, ERA-01, SRA-01, and SSIO-24.
PIO-24
+5 Volts
10k ohm
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