CNT-SVX17G-EN 9
Inputs and Outputs
The inputs and outputs associated with the Tracer
®
VV550/551 controller are shown in
Table 3 and discussed in this section.
Table 3. Input and output summary
Input or output Description
Comm5 • Communication link;
• Rover™ service tool.
Binary input One input configured as one of the following:
• Occupancy;
• Generic;
•Not used.
Analog inputs Four inputs:
• Space temperature;
• Space setpoint;
• Primary air temperature/discharge air temperature;
• Primary airflow (differential pressure).
Zone sensor inputs The controller accepts these inputs from the zone sensor:
• Zone sensor ON and CANCEL buttons;
•10k thermistor;
• Internal and external space setpoint adjustment;
• Single star and double star t
hum
bwheel settings.
Binary outputs Five outputs:
• Primary air valve 1 close;
• Primary air valve 1 open;
•Heat 1;
•Heat 2;
• Heat 3 or Fan On/Off.
Analog output None
Comm5 Communications
Typically, a Comm5 communication link connects unit controllers to the building
automation system. However, peer-to-peer communication between controllers is
possible over any Comm5 link, whether or not a building automation system is present.
The Rover
™ service tool also communicates with the controllers over a Comm5 link.
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