Gastech

Signal Inputs

The base system has four analog input channels, ideal for small installations but can be expanded up to 20 channels for use in larger applications. Input signals are industry standard 4 - 20mA current loop, scaled as 0 - 100ppm carbon monoxide. Inputs are monitored for sensor disconnection and a fault signal is output if a channel falls outside normal expected operating limits.

Fan Control

The control unit outputs the industry standard 0 - 10V DC for connection to standard fan drive systems. The AS1668.2 compliant software ensures that fans are cycled both in accordance to the standard and in a manner that places minimum mechanical stress on the fans, providing longer life and lower cost of ownership. In addition to the analog fan control output, digital outputs are provided to drive the fan in two-speed mode or single on/off mode

Alarm Signalling

Digital outputs are also provided for high gas alarm and system fault indication. The high gas alarm output is designed to provide warring of high gas overload conditions and is set at 100ppm carbon monoxide. The fault output signal is provided to allow indication of internal system faults or connected sensor faults.

Display Panel

A graphical display panel is available as an option allowing indication of measured gas concentrations and status for each connected channel. Logged measurements and status information can also be viewed via the graphical interface, allowing system performance to be monitored. The display features a touch screen giving easy access to measurement and status screens.

Mechanical Design

The control unit is designed to mount into a wall mounted enclosure using standard DIN rail fittings. The display interface provides for easy panel mounting including a sealing gasket to maintain environmental integrity.