36Preparations11 Preparations1.5 RS232C Connection1.5.1 Cable ConnectionRS232 Network specPin assignmentInterface RS232C (9 pins)Pin TxD (No. 2), RxD (No. 3), GND (No. 5)Bit rate 9600 bpsData bits 8 bitParity NoneStop bit 1 bitFlow control NoneMaximum length 4m (only shielded type)Pin Signal1 Detect data carrier2 Received data3 Transmitted data4 Prepare data terminal5 Signal ground6 Prepare data set7 Send request8 Clear to send9 Ring indicator1 2 3 4 56 7 8 9
