Trane Tracer ZN.520 Manual page 82

80
Configuration
Table 44 TB4-1 and TB4-2 output rating
Description Terminals
Generic/ TB4-1
baseboard heat
output
24 VAC TB4-2
1
Table 45 Binary inputs
Binary input Configuration
BI 1 Low coil temperature detection or not used Normally open
BI 2 Condensate overflow or not used
BI 3 Occupancy, generic, or not used
BI 4 Fan status or not used
1
Note : Trane's Rover service tool uses the unit type to determine and download the proper default
binary input configuration.
2
Note : The normally open/closed configuration item refers to the inactive state of the input end device,
such as a freezestat or a condensate float switch. If the device is a normally closed condensate float
switch, the configuration for binary input 2 must be normally closed.
Table 46 Analog inputs (Note 1)
Analog input Configuration
Zone Space temperature
Set Setpoint (hardwired)
Fan Fan switch
AI 1 Entering water temperature
AI 2 Discharge air temperature
AI 3 Outdoor air temperature or generic
temperature input (Note 2)
AI 4 Humidity, CO
4-20mA input
1
Note : Trane Rover service tool uses the unit type to determine and download the proper default
analog input configuration.
2
Note : Analog input 3 (AI 3) configured as generic temperature input does not affect unit operation.
When configured, the Tracer ZN.520 zone controller communicates the generic temperature value to
Rover or Tracer Summit and displays it as generic temperature.
Output Rating Load Energized Load De-energized
12 VA 1 VAC rms
(typical)
12 VA NA
or generic
2
24 VAC rms(typical)
NA
2
Valid range
Normally closed
Normally open
Normally closed
Normally open
Normally closed
Normally open
Normally closed
Calibration range
+/– 10.0°F
(0.1°F resolution)
+/– 10.0°F
(0.1°F resolution)
NA
NA
NA
NA
NA
CNT-SVX04A-EN