Opening Up on Building Automation

The Internet of Things (IoT) is changing the way organizations do business in many areas, including building operations. Taking advantage of IoT means starting with an open building automation system (BAS). Such a system, if designed and operated properly, can reduce your operating costs and help your organization meet its sustainability goals.

With an open BAS, you can integrate building and business systems together. At one hospital, the BAS system integrated operating room occupancy data with surgery workflow metrics, helping to improve clinical outcomes and patient care while reducing energy costs.

Keeping things open

What defines an open system? According to Johnson Controls, there are four components:

  1. Protocols, which are industry-developed and easily connect to other vendors’ systems, such as lighting and security. If the BAS supplier changes vendors often, there may be problems.
  2. Procurement should include the ability to purchase a BAS from multiple suppliers so you can:
  • Buy a system at a competitive price
  • Have multiple controller sources
  • Access a wider talent pool for services

However, there may be inconsistencies between upgrades and expansions, as well as steeper learning curves for mixed systems.

  1. Application programming interfaces (APIs) specify how software components should interact, allowing users to integrate devices with the BAS. Best-in-class interfaces, dashboards and tools can be developed because they’re not limited to the offerings of one manufacturer. But there’s greater security risk and higher user dependency.
  2. Software tools are open (interface, programming and configuration), supporting direct purchase by end users. However, there can be inconsistencies between the tools and available training.

Asking the right questions

When considering an open BAS, ask yourself:

  • Do I clearly understand our current and future needs?
  • How good is the integration and communication with other systems?
  • Who provides the tools? Who owns the software licenses?
  • Do the APIs require licenses, and what do they cost?
  • Does the API vendor support third-party developers?
  • Does the software come with adequate documentation?
  • Is procurement based on subscription or one-time purchase?
  • Who’s responsible for testing and compliance?
  • Is the contractor fully supported by the BAS manufacturer?
  • What are short-term and long-term training costs?

Once you’ve selected a system, document thoroughly and budget appropriately for all required resources. Open systems have a higher security risk from hackers unless the right procedures and practices are in place. Involve your IT department during all steps of the selection and implementation process.

An open BAS provides value by reducing energy and operating costs, increasing occupant productivity and improving safety.