Building Automation Systems

A building automation system (BAS) is a combination of hardware and software that connects facility controls, from HVAC to lighting to security, into a single platform. Modern BAS solutions feature user interfaces that make it easy to fine-tune equipment settings.

At Conexus we upgrade, install, and maintain building automation systems for a variety of industries. Our focus is on helping clients get the best value for their budget without ever compromising on functionality or service.

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Building Automation Concept

What is a Building Automation System?

A BAS centralizes the management of equipment throughout a building into a single platform. This helps facility managers control the environment, ensuring tenants are comfortable and secure.

Facility managers can take advantage of BAS functionalities to combine manual control and automation. For example:

  • Adjust the HVAC control system to meet energy objectives
  • Dim lighting when a room is unoccupied
  • Alter ventilation to remain within air quality and humidity targets
  • Activate alarms in the event of device malfunction
  • Issue security alerts when a motion detector is activated

How Do Building Automation Systems Work?

Although building management systems (BMS) are complex, they all have three fundamental parts:

  • Input/output (I/O) devices – sensors, switches, relays, valves, and damper actuators 
  • Field controllers – controllers listen to input devices and adjust output devices; this is done through open communication protocols or (in the case of legacy systems) closed protocols 
  • Supervisory controls and server – these devices manage multiple field controllers as well as the BAS front-end interface

What’s the difference between an “open” and a “closed” BAS?

The main difference between an open BAS and a closed (proprietary) BAS is the communication bus protocol. 

An open BAS uses field controllers that communicate with a building’s equipment no matter the brand. With an open system, a building owner can choose replacement devices from many manufacturers.  

A closed system (also known as a proprietary system) uses a protocol that only communicates with a particular manufacturer’s equipment and devices. If a proprietary field controller were to fail, the building owner would have no choice but to replace it with an instrument of the same brand.

BAS Equipment Integrations

Many types of modern and legacy equipment can be integrated into a BAS. The most commonly integrated building equipment includes:

  • HVAC – heating, ventilation, air conditioning
  • Lighting – hallways, meeting rooms, parking garages, etc.
  • Security – card access, PIN code access, CCTV, etc.

Conexus BAS Features

At Conexus, we work to find the building automation solution that gives our clients precisely what they need—no more and no less. Features that set our systems apart include:

  • Open systems – We’ve always supported open systems; clients should be able to freely choose the equipment and maintenance that best fits their situation.
  • Smart building components – We offer the latest, advanced building technology tools and integrations, including IoT solutions and building intelligence.
  • Rigorous commissioning procedures – Our close-out process is based on the US Army Corps of Engineers’ procedures to ensure each BAS goes into service smoothly.
  • Providing complete control – No passwords, usernames, or software keys are withheld; we provide everything to run a BAS with (or without) our assistance.

Choosing Conexus For Your BAS 

Choosing Conexus is not just choosing a BAS supplier—it’s selecting a partner in facility management. For over 20 years, we’ve offered customer-centric services that reach beyond basic BAS installation, upgrades, and servicing.

We deliver open systems with the latest technology and tailor our solutions to a client’s current equipment, resources, and budget. If we cannot demonstrate a reasonable return on investment, we will not do the work.

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