5-136 C60 BREAKER PROTECTION SYSTEM – INSTRUCTION MANUALPRODUCT SETUP CHAPTER 5: SETTINGS5If the direct input and output scheme is configured to operate in a ring (DIRECT I/O CH1 RING CONFIGURATION or DIRECT I/OCH2 RING CONFIGURATION is “Yes”), all direct output messages are received back. If not, the direct input/output ring breakself-test is triggered. The self-test error is signaled by the DIRECT RING BREAK FlexLogic operand.Select 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-channelcommunications cards apply the same data rate to both channels. Delivery time for direct input and output messages isapproximately 0.2 of a power system cycle at 128 kbps and 0.4 of a power system cycle at 64 kbps, per each "bridge."Table 5-17: Direct input and output data ratesThe DIRECT I/O CHANNEL CROSSOVER setting applies to a C60 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.The following application examples illustrate the basic concepts for direct input and output configuration. See the Inputsand Outputs section in this chapter for information on configuring FlexLogic operands (flags, bits) to be exchanged.Example 1: Extending the input/output capabilities of a UR-series relayConsider an application that requires additional quantities of contact inputs or output contacts or lines of programmablelogic that exceed the capabilities of a single UR-series chassis. The problem is solved by adding an extra UR-series IED,such as the C30, to satisfy the additional input and output and programmable logic requirements. The two IEDs areconnected via single-channel digital communication cards as shown in the figure.Figure 5-60: Input and output extension via direct inputs and outputsIn this application, apply the following settings. For UR-series IED 1:Module Supported data rates2A, 2B 64 kbps2E, 2F 64 kbps2G, 2H 128 kbps2I, 2J 64 kbps, 128 kbps72, 73 64 kbps, 128 kbps74, 75 64 kbps76, 77 64 kbps7A, 7B, 7C, 7D 64 kbps, 128 kbps7E, 7F, 7G 64 kbps7H, 7I, 7J, 7K 64 kbps, 128 kbps7L, 7M, 7N, 7P, 7Q 64 kbps7R, 7S 64 kbps7T, 7W 64 kbpsThe G.703 modules are fixed at 64 kbps. The DIRECT I/O DATA RATE setting is not applicable to these modules.
