Binary outputs for 4-cool applications
CNT-SVX12C-EN 31
Binary outputs for 4-cool applications
This configuration supports rooftop unit applications that have the fol-
lowing components:
• Economizer
• Supply fan
• Cool 1
• Cool 2
• Cool 3
• Cool 4
• Exhaust fan
The Tracer ZN517 controller has seven binary outputs. Each binary out-
put is a relay with a rating of 12 VA. Table 11 describes the function of
each output for 4-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.
Overriding binary outputs
Use the manual output test to manually control the outputs in a defined
sequence. For more information about the manual output test, see “Man-
ual output test” on page 74.
Table 11. Binary outputs for 4-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 (Y3) Cool stage 3
4 (Y4) Cool stage 4
5NO/5COM/5NC (binary output 5) Exhaust fan/generic/occupancy
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