© 2011 Gastech Australia Pty Ltd
Page 6
1.
Introduction
The GTA-VSD20i
TM
is an AS1668.2 compliant ventilation fan controller system targeted at car park air quality
monitoring applications. The system is designed to provide ventilation fan control based on gas concentration
input signals from connected gas detectors. The inbuilt control software provides both on/off and variable
speed fan operation that complies with AS1668.2 and the operational recommendations published by fan
manufacturers.
The GTA-VSD20i consists of individual components that require connecting together to form the desired
system. The components are:- The main controller, optional extender Modules and an optional Graphical
Display.
The main control module is supplied factory pre-configured and will operate independently without the HMI
unit connected. The HMI is available as an option for systems where changes need to be made to the channel
operations of the system and / or visualisation of the gas concentration readings is required.
1.1
Features
•
AS1668.2 compliant operation.
•
Scalable from 4 to 20 inputs.
•
Industry Standard 4 - 20mA inputs.
•
Industry Standard 0 - 10V output.
•
Variable Speed and on/off fan control.
•
Low stress fan drive control.
•
High gas overload signal output.
•
System fault signal output.
•
Gas alarm output signals.
•
Touch screen user interface option.
