3-32 Service ManualAutoconnect system, paper tray options, envelope feeder—electricalAutoconnect cabling and connectorsThe printer options make electrical connection automatically, requiring no external cables when the option ismechanically installed under the printer. Communication between the option and the base printer stops whenyou remove an option. The printer no longer recognizes the option and deletes associated messages. Eachinstalled option below the base printer provides an electrical autoconnect to the option attached below it. We donot recommend to attach or “Hot Plug” any options with the base printer power turned on.Duplex OptionThe duplex option interface is a six pin autoconnector that provides a +24 V dc, +24 V dc return, serial interfacetransmit signal, serial interface receive signal, and two ground pins. The duplex option receives the +24 V dcfrom the base printer for the duplex motors and also converts the voltage to +5 V dc for duplex electronics.Duplex chassis grounding is provided from the printer to the duplex option through a ground spring attached tothe frame and base of the printer. The ground connection is automatically made when the option is installedbelow the printer.The paper input sensor is located in the rear of the duplex option under the input paper guide. The paper exitsensor is located on the left frame assembly.Option microcodeThe options are “Smart Options” or options that have a system board. The option system board has amicroprocessor that controls the option mechanism. A software architecture is provided that controls the optionand communicates information such as paper path status, sensor status, motor status, and so on to the baseprinter.
