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Pull Ups
Nine or ten pin bussed resistor packs are installed to provide pull-ups to the input ports. These
are installed on all ports. The pull-up resistor packs are rated at 10K ohms. Figure 3 below
provides the bussed resistor and corresponding port. The resistors insure that no line is floating
which is not connected. This provides consistent biasing on all un-terminated lines.
Sealevel Systems PIO-24.PCI
Technical Description
Bussed
Corresponding
Resistor
Port
RP1
Port A
RP2
Port B
RP3
Port C
Figure 3-Pull Up Resistors
Page 7
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