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Manual Overrides as per EN ISO 16484-2:2004 The manual override switches and potentiometers of the output modules (…R822A, …R824A,) support direct operation as per EN ISO 16484-2:2004, section 5.4.3 "Local Priority Override/Indicating Units." Specifically, the positions of the manual override switches and potentiometers directly control the outputs – independently of the Excel Web Controller and HMI. When a manual override switch or potentiometer is not in its default position ("auto"), the corresponding output LED will blink continuously, and the output module will send a feedback signal with the status "manual override" and the given override position to the Excel Web Controller (which will then also store this information in its alarm memory). Note: When updating the firmware of output modules, their outputs are turned OFF – regardless of the position of their manual override switches and/or potentiometers.