Robertshaw SMART 2000, Owner'S Manual, Page: 21 / 48

21
Modbus Communications
Your thermostat has circuitry which permits it to receive commands or provide
data to a building management system. A satellite symbol will be displayed on the
LCD when this communication is in progress. The intent of these communications
is to permit the centralized control of all building functions which can include
building climate control. All thermostat user and installer functions can be
accessed via the BMS and overrides may be made to any setting made by the user.
This ability is especially useful when a large building with multiple air conditioning
units must be controlled.
Remote Temperature Sensors
Your thermostat is fitted with an accurate and reliable internal temperature sensor
used to measure the room temperature. There may be occasions where the
thermostat cannot be placed in an ideal location for accurate space temperature
measurement; therefore the installer may have added Remote Temperature
Sensors. These sensors will report the space temperature from the remote
location. This temperature will be displayed on the LCD and used to control your
heating and cooling system.
If your thermostat is used in a commercial location, your room temperature
sensor may be fitted with a button which activates the after hours run function.