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What is the purpose of the Master Override feature on the 140AVO02000 ?

The Master Override is an input that allows the customer to connect a voltage source to the module which will be routed via an internal relay to the output of the AVO020 in the event of the loss of bus communications to the module. It allows you to maintain an output voltage in the event of bus failure.
If the Master Override terminal is not connected to an external source, then it must be connected to the minus or common terminal of that channel.

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