- BuildingDesign News - Construction / Services News Archives

Article Date: 3rd December 2018

Trend’s IQ®4 Range has been Complemented by the Introduction of IO Modules with Override Functionality

Override Plant - Building Energy Management Systems - BEMS Systems

Trend IQ®4 Range

Available in both analogue and digital variants, Trend’s new IQ®4 Hand/Off/Auto (HOA) modules make it possible to override plant when a controller/strategy is not achieving the results required.

These devices also enable plant to be overridden for testing and can be used for commissioning, as they work straight out of the box with no need to address the module or connect it to an IQ®4 controller.

Ease of use has been factored into every aspect of the HOA modules. Labels clip over the modules to individually identify each switch, so even a non specialist can see what needs to be overridden. Both module options utilise a two-state operation and require no tools to operate – pressing the knob takes the channel in or out of override and twisting the knob sets the status/value of that channel. This means that an engineer can pre-set the value to be overridden, so that when the overridden state is entered the module immediately goes to the value required with no additional adjustments.

The HOA modules offer various methods of indicating status. When a channel is overridden the button flashes, providing a clear indication that there is something that needs investigating. Additionally, an alarm can be configured on each channel so, when the override button is pressed, notification arrives on an IQ®VISION user interface.

Finally, it is possible to provide indication of the status and value of the override on an IQ®VISION schematic, so that it is clear on the page if any plant is being overridden.

David Field, product manager at Trend, states, “IQ®4 HOA modules are the missing piece of the jigsaw for countries where the ability to override plant is a common requirement in specification documents. Not only have we addressed this issue, we have done so in a highly innovative way that offers a whole host of features and benefits.”

BuildingDesign Media © - BuildingDesign Portal | BuildingDesign Tenders