Input and Output Connections
20
AC-225x-B Series Hardware Installation and User Manual
4.
Input and Output Connections
This chapter describes the AC-225x-B access control panel's input and output
connections.
4.1
Input Types
There are four input types
–
Normally Open, Normally Closed, Normally Open
Supervised 1 or 2 resistors, and Normally Closed Supervised 1 or 2 resistors.
Inputs IN1, IN1A, IN2 and IN2A may be configured individually as either supervised
or non-supervised inputs. Configure each input separately via the AxTraxNG
system.
Non-supervised inputs have two states:
▪
Normal State
▪
Abnormal State
Supervised inputs have three states:
▪
Normal State
▪
Abnormal State
▪
Trouble State
The Trouble state is caused by either tampering with the input circuit or by faulty
hardware installation. Once configured as supervised input, add a resistor of 2.2
k
Ω
, of 8.2 k
Ω
or both on the input circuit. See the figures in the following
subsections.
4.1.1
Normally Open Input Connection
Normally Open Input has 2 states:
▪
Switch Open
–
Normal State:
Loop resistance = Infinite (open circuit).
▪
Switch Closed
–
Abnormal State:
Loop resistance = 0 (short circuit)
Figure 10: Normally Open Input Connection
