Omega Vehicle Security OMG-USB-DIO48 - Manual (Page 8)

Technical
OMG-USB-DIO48 Page 4
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
Resistor Port
RP3 Port A1
RP2 Port B1
RP1 Port C1
RP6 Port A2
RP5 Port B2
RP4 Port C2
Figure 2- Pull Up Resistors