CNT-SVX04A-EN
42
Input/output summary
The Tracer ZN.520 zone controller includes the following input and output
points:
■
Power:
24 VAC NEC Class 2 TB1-1, TB1-2
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Four binary inputs:
Low coil temperature detection J2-1, J2-2
Condensate overflow J2-3, J2-4
Occupancy (or generic binary input) J2-5, J2-6
Fan status (differential pressure switch) J2-7, J2-8
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Twelve binary outputs, based on the application and unit configuration:
High fan speed J1-1
Medium fan speed or exhaust fan J1-2
Low fan speed J1-3
Cool, heat/cool changeover modulate open, 2 position cool, DX cooling J1-5
Cool, heat/cool changeover modulate close J1-6
Face/bypass damper modulate to face J1-7
Face/bypass damper modulate to bypass J1-8
Heat modulate open, 2 position heat, 1st stage of electric heat J1-9
Heat modulate close, 2nd stage of electric heat J1-10
Damper modulate open J1-11
Damper modulate close J1-12
Generic/baseboard heat binary output TB4-1, TB3-1
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Seven analog inputs:
Space temperature (timed override and cancel) TB3-1
Space temperature setpoint (thumbwheel) TB#-3
Fan mode input TB3-4
Entering water temperature J3-1, J3-2
Discharge air temperature J3-3, J3-4
Outdoor air temperature (or generic temperature input) J3-5, J3-6
Universal 4-20mA (generic 4-20 mA, relative humidity, or CO
2
)
J3-7, J3-8, J3-9
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Comm5 communications TB2-1, TB2-2; TB2-3, TB2-4; TB2-5, TB2-6
