1255 InterfacesOverviewThis chapter describes the host interfaces provided with the printer. Theprinter interface is the point where the data line from the host computer plugsinto the printer. The interface processes all communications signals and datato and from the host computer. Plus, with the Auto Switching feature, you canconfigure the printer to accept several interfaces at the same time (see “AutoSwitching” on page 104).IMPORTANT To comply with Electromagnetic Compatibility (EMC) regulatoryrequirements all electrical signal interface cables connected to thisprinter must be of a minimal quality level, be of the correct length, andbe properly installed.The RS-232 port and parallel port interface cables must meet thefollowing specifications:• The cable design must be double shielded with a copper braid overan aluminum mylar foil and not just a conductive foil spiral wrappedaround a drain wire.• The shield must terminate coaxially (360 degrees) to a metalconnector housing and not be terminated by just a simple wire lead.• The cable length, including connectors, must be 5 meters or less.• The cable connector anchor screws must be securely seated intothe printer receptor hardware.For reference purposes only, two specific Centronics parallel portcables that have been tested and found to comply with theserequirements are Belkin ® part number F2A046-10 and Primelogic ® partnumber PLU 2823224. Other electrically equivalent cables areacceptable.This chapter describes the interfaces provided with the printer.Standard Host Interfaces:• High Speed Serial Port (RS-232)• USB 2.0 Universal Serial Bus
