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The method for bypassing the entire current loop if an error occurs is to use a current loop isolator or a current loop splitter. These devices are designed to provide galvanic isolation between the input and output signals, which means that they can break the electrical connection between the two components of the loop. This allows the device to continue functioning even if there is a fault in one part of the current loop, and can prevent damage to other components or the entire system. Additionally, current loop isolators and splitters can provide signal conditioning, amplification, or conversion to ensure that the output signal is in the correct format for the receiving device.