NCR 7454 - Optional Peripherals and Features

Chapter 1: Product Overview 1-13
ThewiredEthernetconnectionisnotcertifiedforuseinconfigurations
whereawirelessadapterisinstalled.
Universal Serial Bus
TheSummaPOSMotherboardprovidesthreeports,oneofwhichis
reservedforintegrateddevices(notexternallyaccessible).Onlytwoof
thethreeUSBportsontheSummaPOSMotherboardcanbeactiveat
thesametime.IftheinternalauxiliaryUSBportisenabled,oneofthe
twoportson
themainconnectorrowbecomesdisabled.This
functionalityiscontrolledthroughtheBIOSsetupmenu.
Note: USBperipheralsrequiresupportfromtheoperatingsystem,
whichiscurrentlylimitedtoWindows98.
Serial Ports
TheSummaPOSMotherboardprovidestwoRS‐232ports(9‐pinD‐
shellconnectors,Ports1and2)directlyontheMotherboardand
supportstwoadditionalRS‐232ports.Ports3and4requireanoptional
harnessconnectiontotheMotherboard.Ports1and3canbesupplied
with+12V
DConPin9whenproperlysetupintheBIOS.Thetotal
powerdrawnbyPorts1and/or3mustbenogreaterthan1ampat+12
VDC.RefertothefollowingtableforRS‐232pinoutinformation.
TheBIOSprovidesflexibilityinmappingresources.However,a
fully‐
loadedsystem(2PCMCIAcardsthatrequireIRQs,fourserialportsin
use,USBinuse,parallelportinuse,andMSR)maynothaveenough
availableIRQstosupportallserialports.UseaUSBserialport
expandertoovercomethisPCarchitecturelimitation.
RS-232 DB-9 Male Connector Pinout
Pin Port A Port B
1 DCD DCD
2 RXD RXD 
3 TXD TXD 