GE Multilin B30 Bus Differential System 3-233 HARDWARE 3.2 WIRING3.2.8 RS232 FACEPLATE PORTA 9-pin RS232C serial port is located on the B30 faceplate for programming with a computer. All that is required to use thisinterface is a computer running the EnerVista UR Setup software provided with the relay. Cabling for the RS232 port isshown in the following figure for both 9-pin and 25-pin connectors.The baud rate for this port is fixed at 19200 bps.Figure 3–23: RS232 FACEPLATE PORT CONNECTION3.2.9 CPU COMMUNICATION PORTSa) OPTIONSIn addition to the faceplate RS232 port, the B30 provides a rear RS485 communication port.The CPU modules do not require a surge ground connection.Figure 3–24: CPU MODULE COMMUNICATIONS WIRINGb) RS485 PORTRS485 data transmission and reception are accomplished over a single twisted pair with transmit and receive data alternat-ing over the same two wires. Through the use of the port, continuous monitoring and control from a remote computer,SCADA system, or PLC is possible.NOTENOTE
