Omega Engineering OMG-PCI-DIO48 User Manual
Page 10
Technical Description
OMG-PCI-DIO48
Page 6
Pull Ups
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 2 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.
Bussed
Corresponding
Bussed
Corresponding
Resistor
Port
Resistor
Port
RP4
Port A1
RP1
Port A2
RP5
Port B1
RP2
Port B2
RP6
Port C1
RP3
Port C2
Figure 2-Pull Up Resistors