Input and Output Requirements
4.
Input and Output Requirements
This chapter describes the AC-525 access control panel's input and output
requirements.
4.1
Input Types
There are six 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 ViTrax AS-525AV 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 2.2K, 8.2K, or both on the input circuit. See the following
diagrams.
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).
AC-525 Hardware Installation and User Guide
Page 18
