Building Automation Systems (BAS) Architecture

SKU: RVI-11465Duration: 20 Minutes

BAS: What is it and how does it simplify our lives? Building automation describes the advanced functionality provided by the control system of a building. A building automation system (BAS) is an example of a distributed control system. The control system is a computerized, intelligent network of electronic devices designed to monitor and control the mechanical, electronics, and lighting systems in a building. This course will discuss the BAS topology and will include topics such as primary and secondary bus, as well as analog and digital input and output.

Course Details


Training Time: 20 minutes

Compatibility: Desktop, Tablet, Phone

Based on: Industry Standards and Best Practices

Languages: English

Learning Objectives

  • Define basic BAS terminology
  • Identify basic electronic components and markings
  • Identify what is considered Open Protocol
  • Calculate total resistance in a parallel circuit
  • Define interoperability Recognize resistor color codes
  • Select the voltages/current DDC systems operate on

Key Questions

The following key questions are answered in this module:

What is the purpose of a Building Automation System (BAS)?
The purpose of a Building Automation System (BAS) is to save energy and optimize occupant comfort in a building.

What are the three major elements of a control loop?
A control loop consists of a sensor, a controller and an actuator.

How are sensors used in control loops?
Sensors convert physical changes into signals (typically electrical) which can be acted on by a controller.

How do controllers and computers of a BAS communicate with each other?
The controllers and computers of a BAS communicate with each other over a digital network.

What is the difference between a series circuit and parallel circuit?
In a series circuit there is only one path for the current flow. A parallel circuit has multiple paths, or branches, through which current can flow.

Sample Video Transcript

Below is a transcript of the video sample provided for this module:

Sensors convert physical phenomena such as temperature and pressure into electrical signals. Actuators convert electrical signals back into physical action, such as changing a valve opening or a damper position. Analog actuators respond to continuously varied output signals from a controller and generate a continuously varied output. For example, a 0 to 10 volt signal could control a valve from 0% to 100% open. With such an actuator, an opening of 37% could be specified. A digital actuator turns something on or off, it opens or closes, there are no intermediate settings. A simple example of digital actuator is a light switch. Lights can be turned on or off. A motor contactor can be commanded to start or stop current flow. Digital actuators are typically less expensive and more robust than analog actuators.
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