5.45.4.1Communicating with the Host PCSetting the Transmission Speed of the CU-300CU-301: Set the transmission speed to the same value as that of the BHT and host PC, by using theDIP switch.CU-321: The transmission speed is automatically determined by the host PC.CU-311: Use the CU with the transmission speed fixed to 115,200 bps (default). (Do not disturb the DIPswitch.)Set the transmission speed of the CU-301 to the same value as that of the BHT and the host PC, byusing the DIP switch next to the power inlet connector.(1) Remove the protection sheet of the DIP switch from the CU-301.(2) Set the selectors of the DIP switch as shown below.DIP switch Protection sheet(3) Reinstall the protection sheet.Do not set the DIP switch to any configurations other than one of the five shown above.When removing the protection sheet, take care not to let any foreign material get into the CU.144