3-20 B90 Low Impedance Bus Differential System GE Multilin3.2 WIRING 3 HARDWARE33.2.6 RS232 FACEPLATE PORTA 9-pin RS232C serial port is located on the B90 faceplate for programming with a personal computer. All that is required touse this interface is a personal computer running the EnerVista UR Setup software provided with the relay. Cabling for theRS232 port is shown in the following figure for both 9-pin and 25-pin connectors.The baud rate for this port is fixed at 19200 bps.Figure 3–19: RS232 FACEPLATE PORT CONNECTION3.2.7 CPU COMMUNICATION PORTSa) OVERVIEWIn addition to the faceplate RS232 port, the B90 provides two additional communication ports or a managed six-port Ether-net switch, depending on the installed CPU module. In the following table, multiple Ethernet ports are supported, but onlyone can be used at a time. For example, the 10Base-F (normal) port and 10Base-T (alternate) port are supported in the 9Gmodule, but only one can be used at a time.The CPU modules do not require a surge ground connection.The managed Ethernet switch (module 9S) is not available for the B90 device.Table 3–3: CPU MODULE COMMUNICATIONS (APPLICABLE MODULE DEPENDS ON ORDER CODE)CPU TYPE COM1 COM29E RS485 RS4859G 10Base-F or 10Base-T (obsolete) RS4859H Redundant 10Base-F or 10Base-T (obsolete) RS4859J 100Base-FX or 10/100Base-T RS4859K Redundant 100Base-FX or 10/100Base-T RS4859L 100Base-FX (obsolete) RS4859M Redundant 100Base-FX (obsolete) RS4859N 10/100Base-T RS485NOTENOTENOTE
