Input and Output Requirements
• Open circuit (Infinite loop resistance) or short circuit (0
resistance) across input terminals - Trouble State.
Figure 13: Normally Closed Supervised Input (Double Resistor)
4.2 Inputs Description
Request to Exit Button (REX) Input
Use the REX Input to open a door directly. The following should
be defined:
Single door controller: Door 1 – IN 1
Double door controller: Door 1 – IN 1
Door 2 – IN 2
Typically, the REX input is connected to a Normally Open push
button that is located inside the premises. The push button is
generally located in an easy-to-access position and opens a
door without reading a proximity card or PIN code.
AC-225 Hardware Installation and User Guide Page 22
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