Binary outputs for 2-heat/2-cool applications
CNT-SVX12C-EN 13
Binary outputs for 2-heat/2-cool
applications
This configuration supports rooftop units and split systems applications
that have the following components:
• Economizer
• Supply fan
• Cool 1
• Cool 2
• Heat 1
• Heat 2
• Exhaust
The Tracer ZN517 controller has eight binary outputs. Each binary out-
put is a relay with a rating of 12 VA. Table 5 describes the function of
each output for 2-heat/2-cool applications.
Binary output 5
Use the Rover service tool to configure binary output 5 (5NO/5COM/5NC)
in one of the following ways. It is the only output that can be configured
as a generic binary output.
• Not used.
• Exhaust fan: Will energize when the economizer outside air damper
position is greater than the user-defined control point.
• Occupancy: Will energize when the Tracer ZN517 is in the occupied
mode.
• Generic: Can be monitored only by a BAS and has no direct effect on
Tracer ZN517 operation.
Table 5. Binary outputs for 2-heat/2-cool applications
Binary output terminal label Function
OPN Economizer, drive open
CLS Economizer, drive closed
G Supply fan
1 (Y1) Cool stage 1
2 (Y2) Cool stage 2
3 (W1) Heat stage 1
4 (W2) Heat stage 2
5NO/5COM/5NC (binary output 5) Exhaust fan/occupancy/generic
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