Rosslare AC-225-B Series - Normally Closed Supervised Double Resistor Input Connection; Inputs Description; Request-To-Exit (REX) Button Input; Door Monitor Input

Input and Output Connections
AC-225x-B Series Hardware Installation and User Manual 23
4.1.6 Normally Closed Supervised Double Resistor Input
Connection
Connect a 2.2 kΩ resistor in series to the input switch contacts.
Connect an 8.2 kΩ resistor parallel to the input switch contacts.
Normally Closed Supervised Input has 3 states:
▪ Switch Closed – Normal State:
Loop resistance = 2.2 kΩ
▪ Switch Open – Abnormal State:
Loop resistance = 10.4 kΩ
▪ Open circuit (Infinite loop resistance) or short circuit (0 resistance) across
input terminals – Trouble State
Figure 15: Normally Closed Supervised Input Connection (Double Resistor)
4.2 Inputs Description
4.2.1 Request-to-Exit (REX) Button Input
Use the REX input to open a door directly. 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.
Single door controller:
Door 1 – IN1
Double door controller:
Door 1 – IN 1
Door 2 – IN 2
REX input functions when using MD-D02B:
Double door controller:
(each door has two readers)
Door 1 – IN1
Door 2 – IN5
Four door controller
(each door has one reader)
Door 1 – IN1
Door 2 – IN2
Door 3 – IN5
Door 4 – IN7
4.2.2 Door Monitor Input
The Door Monitor input typically connects to a Normally Closed door sensing
micro-switch for door status monitoring. Using Door Monitor enables many