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Additionally, you can wire a REX sensor in parallel with the intercom (figures 1 and 2) or directly to your locking hardware (figures 3 and 4), depending on the door location and building code requirements.
Option 1: Wiring REX in parallel with the intercom
Figure 1: Wiring intercom with optional in-parallel REX to 4-Port Board.
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Option 2: Wiring REX to locking hardware
Figure 3: Wiring intercom with optional REX to mag lock on 4-Port Board.
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