This chapter describes the handling procedure of the communication unit CU-300, the interfacing withthe host PC, and the charging of the battery cartridge. It also describes the LAN-support communicationunit CU-311.5.1 Functions of the CU-300 .................................................................................................................................1405.2 Components and Functions ............................................................................................................................1415.3 Applying Power to the CU-300........................................................................................................................1425.4 Communicating with the Host PC ...................................................................................................................1445.4.1 Setting the Transmission Speed of the CU-300 .......................................................................................1445.4.2 Interface Cable Connection ......................................................................................................................1455.4.3 Interfacing with the Host PC .....................................................................................................................146[ 1 ] CU-301/321...........................................................................................................................................146[ 2 ] CU-311..................................................................................................................................................1475.5 Charging the Battery Cartridge .......................................................................................................................1485.6 Functions Exclusive to the CU-311 .................................................................................................................1505.6.1 Displaying the CU-311 Status...................................................................................................................1505.6.2 Displaying the CU System Information on the BHT..................................................................................1515.6.3 Updating the CU System Program via the BHT .......................................................................................1515.7 Interface Specifications ...................................................................................................................................152[ 1 ] Interface Connector and Pin Assignment .............................................................................................152[ 2 ] Interface Cable Connection ..................................................................................................................154Chapter 5Handling the CU-300 (Option)139