Titus Alpha BAC-8001/BAC-8201 Cooling Only - Manual (Page 11)

Installing the controllers
Connecting inputs
11
Connecting
inputs
The BAC-8001 and BAC-8201 controllers have preconfigured analog inputs to
support the supplied programs. The inputs cannot be changed to binary or
accumulator inputs. Only one input has an externally available physical
terminal. All of the inputs are preconfigured for the application programs
supplied in the controllers and are listed in Table 2-1.
Discharge air temperature Connect a 10k , Type 3 thermistor temperature probe
to the discharge air temperature input. The input includes the internal pull-up
resistor. An STE-1405 sensor is suitable for this application. Follow the
instructions supplied with the sensor for installation. See
Setting temperature
setpoints on page 30 for setting up discharge air temperature limiting that requires
this input sensor.
Space Temperature Input The space temperature input is connected only
through the RJ-45 thermostat and sensor input jack. It is a configured as an
analog input for STE-6010, STE-6014, and STE-6017 sensors. If an STE-8000
sensor is connected to the controller, this input is ignored. See
Connecting to
sensors on page 15 .
Space Setpoint The space setpoint input is connected only through the RJ-45
thermostat and sensor input jack. It is a configured for the setpoint dials on
STE-6014 or STE-6017 sensors. If an STE-6010 or STE-8000 sensor is connected to
the controller, this input is ignored. See
Connecting to sensors on page 15 .
Primary Duct Pressure The primary duct pressure input is an internal
measurement from the airflow sensor.
Primary Damper Position (BAC-8201 only) The primary damper position input
is preconfigured as an analog input that represents the position of the internal
damper.
Table 2-1 BAC-8001 and BAC-8201 input objects
Object Function Name Unit Location Pull up
AI1 Discharge Air Temperature DISCHARGE AIR °F Terminal block 10k
AI2 Space Sensor SPACE SENSOR °F RJ-45 10k
AI3 Space Setpoint SPACE SETPOINT °F RJ-45 10k
AI4 Primary Duct Pressure PRIMARY DUCT wc Internal airflow sensor N/A
AI5 Primary Damper Position PRIMARY POSITION Volts Internal damper position N/A
Illustration 2-3 Discharge air temperature