page 2.29iS15-2K Cinema Projector: User Manual 2. InstallationUSBUSB Type A is reserved for future expansion.USB type B can be used to connect to a computer, using a standard USB cable.Remote Control 1Connect the Remote Control (supplied) to this socket.Remote Control 2An external switching unit (not supplied) can be connected to this socket.PC ControlThe projector can be controlled from a computer via a serial connection, using astandard RS232 cable (not supplied).PC Control TService or Installation personnel can use this serial connection, to performadvanced setup functions.General Purpose Input/Output (GPIO)For future expansion.PC adaptor card slotA PC adaptor card can be inserted here including:• memory card, for firmware updates (supplied)• wireless network adaptor card, to control the projector from a computer.NotesFor more information aboutcontrol input connections seeConnections, in section 6.Appendix.For more information aboutcontrolling the projector from acomputer, see your provider.Generalpurpose I/OPC control-T(out of view)