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Mallory Ignition ACCEL Engine Analyzer Series Wideband Oxygen Sensor 77062_77062n_77062s_77063 User Manual

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Note: All input and output drivers are active low. For
example, in order to trigger data logging, the input
wire (AuxIn1, Pin 7, Color: Green with Yellow trace)
will be activated by switching the input wire to a
ground source. Similarly, any output wire should be
connected to the ground trigger of a relay for proper
operation.