5.2 Installation5.2.1 Wiring the Alphadesk PC to the DCU distance less than 3 m.The Alphadesk central control PC is connected to the RS232 connector (see Figure 5.1)of the DCU with an RS232 cable. Normally this cable is equipped with two 9-poleconnectors. Some PCs however are equipped with a 25-pole RS232 connection.The cable layout for both connections is given in Figure 5.2.RS232 connector for connection with Alphadesk central control PCMains inlet, 110...230 Vac/50..60 Hz, 1.6AFuse, T3.15 Ah/250 VacOn/Off switchNoteThe maximum length of the RS232 cable is 3 metres.CHAPTER 5Installation InstructionsDECT6000 119922 141 80271 03-07en1 2 43Link cardnot usednot usedACU 7ACU 6ACU 5ACU 4ACU 3ACU 2ACU 1ACU 0 BS 0-7BS 8-15Figure 5.1 Bottom view of the DCUDCU Alphadesk central control PC9-pole Dconnectorfemale9-pole DconnectorfemalePin12345678Pin123456789DCDRxDTxDDTRGNDDSRRTSCTS832207645PinDescriptionDCDRxDTxDDTRGNDDSRRTSCTSNot connectedDescriptionor25-pole DconnectorfemaleFigure 5.2 RS232 9-pole female to 9- or 25-pole female