GE Multilin B90 Low Impedance Bus Differential System 5-535 SETTINGS 5.2 PRODUCT SETUP5Select the DIRECT I/O DATA RATE to match the data capabilities of the communications channel. All IEDs communicatingover direct inputs and outputs must be set to the same data rate. UR-series IEDs equipped with dual-channel communica-tions cards apply the same data rate to both channels. Delivery time for direct input and output messages is approximately0.2 of a power system cycle at 128 kbps and 0.4 of a power system cycle at 64 kbps, per each ‘bridge’.For B90 applications, the DIRECT I/O DATA RATE should be set to 128 kbps.The G.703 modules are fixed at 64 kbps. The DIRECT I/O DATA RATE setting is not applicable to these modules.The DIRECT I/O CHANNEL CROSSOVER setting applies to B90s with dual-channel communication cards and allows crossingover messages from channel 1 to channel 2. This places all UR-series IEDs into one direct input and output networkregardless of the physical media of the two communication channels.Table 5–4: DIRECT INPUT AND OUTPUT DATA RATESMODULE CHANNEL SUPPORTED DATA RATES74 Channel 1 64 kbpsChannel 2 64 kbps7L Channel 1 64 kbps, 128 kbpsChannel 2 64 kbps, 128 kbps7M Channel 1 64 kbps, 128 kbpsChannel 2 64 kbps, 128 kbps7P Channel 1 64 kbps, 128 kbpsChannel 2 64 kbps, 128 kbps7T Channel 1 64 kbps, 128 kbps7W Channel 1 64 kbps, 128 kbpsChannel 2 64 kbps, 128 kbps7V Channel 1 64 kbps, 128 kbpsChannel 2 64 kbps, 128 kbps2A Channel 1 64 kbps2B Channel 1 64 kbpsChannel 2 64 kbps2G Channel 1 128 kbps2H Channel 1 128 kbps76 Channel 1 64 kbps77 Channel 1 64 kbpsChannel 2 64 kbps75 Channel 1 64 kbpsChannel 2 64 kbps7E Channel 1 64 kbpsChannel 2 64 kbps7F Channel 1 64 kbpsChannel 2 64 kbps7G Channel 1 64 kbpsChannel 2 64 kbps7Q Channel 1 64 kbpsChannel 2 64 kbps7R Channel 1 64 kbps7S Channel 1 64 kbpsChannel 2 64 kbpsNOTE
