BAS-143
___ are devices that indicate building
conditions to the BAS field controller.
Inputs
What is the "R" terminal on the thermostat?
Power - 24VAC
___ are devices that change the state of a
controlled device receiving its electrical signal from the field controller.
Outputs
What is the "W" terminal on the thermostat?
Heat
Which attribute on the DMM is indicated using the letter v w/ a sine wave line next to it?
VAC or Voltage Alternating Current
Battery powered circuit is an example of which of the two types of electrical circuits?
DC / Direct Current
____ is a device that sense and
sends building condition information to a field device / controller.
BAS Input
What is the "Y" terminal on the thermostat?
What is the "R" terminal on the thermostat?
Name the 4 data point types used in BAS.
Analog - Input Output
Binary - Input Output
What is the "G" terminal on the thermostat?
Fan
Give two examples of dry contact data points in BAS.
Fan / Pump Status
Filter Ok/Plugged
Room / Zone Occupancy
Low temp Alarm
In the US, the standard quantity of hertz (hz) is?
60
A ____ is defined as a contact in which power/voltage is not present.
dry contact
Which attribute on the DMM resembles a horseshoe visually?
Resistance / Ohms
One cycle of change from + to – is called a ___.
Hertz
Which two attributes does an electrical circuit produce?
Heat
Light
Voltage standard used in all BAS Control applications is?
24 VAC/VDC
What type of circuit has more than one path for current to flow?
Parallel circuit
The length of a conductor (wire) directly effects which attribute of an electrical circuit?
Resistance
Ohm's law states that voltage in a circuit is equal to.
I x R or Current (times) Resistance
What attribute on the DMM resembles a Wi-Fi symbol and omits an audible sound to indicate integrity of wiring?
Continuity
Which type of transformer is pre-dominantly used in BAS HVAC control applications?
Step-Down
A ____ is an electrical component that accepts an electrical signal?
Load
Describe in detail the process of measuring a temperature sensor (thermistor). DETAIL!!!!
Remove control wires from field device
measure resistance using DMM
translate ohm reading using temp resistance chart
compare actual reading vs displayed reading in software.
The longer the conductor (wire), the ___ the resistance of the electrical circuit.
Greater