RAE-SAN DRAFT D, Installation Manual

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INPUTS
All inputs have pull up resistors so they can sense when pulled low without additional components needing
to be added.
On inputs that need to float low and are pulled high when active the appropriate resistor can be snipped with
a pair of side-cutters to avoid the pull-up function. The resistors for each are labelled below.
If you wire the controls such that that all buttons pull to ground, then there is no need to snip anything, but
the flexibility is there if needed if you have controls that pull high.