Auto-Zone Control Systems Auto-Zone Plus Systems Installation & Operation (Version 03A) - Manual (Page 178)

Section 4 Auto-Zone Plus
4-28 Start-Up and Troubleshooting
2.2.6 Static Pressure Sensor Connector
The Static Pressure Sensor may be connected to this terminal block. The sensor may
alternatively be connected via its modular plug to the Static Pressure Sensor modular
jack, located next to this connector. The Static Pressure Sensor wiring consists of three
wires.
+5V - (RED) This wire provides power to the sensor
SIG - (BLK) This wire carries the 0-5V signal from the pressure sensor. The
signal is proportional to the static pressure.
GND - (GRN) Common return wire, this point is tied to GND on the Zone
Manager.
2.2.7 Analog Input Connector
This connector provides the termination point for all of the temperature sensors and the
auxiliary contact closure inputs.
All of the temperature sensor inputs (SAT, RAT, OAT) are designed to accept a standard
10K Type III thermistor temperature sensor. The sensors can be checked by disconnecting
the wires at the terminal block and comparing the resistance against the chart at the end of
this section. The sensors may also be checked by measuring the voltage (DC Volts) at the
terminal block and comparing the measured value to the chart. The negative meter lead
should be on the GND terminal.
Tip
Any inputs that measure +5.1 VDC are OPEN, and any inputs which have less
than +0.1 VDC are SHORTED. Look for wiring errors if this is a temperature
input.
The wiring consists of the following six inputs:
SAT - Supply Air Temperature
This input accepts a two wire 10K Type III thermistor temperature sensor. The
sensor measures 10,000 Ohms @ 77
°F. The resistance drops as the temperature
increases. The sensor is connected between this terminal and the GND terminal.
RAT - Return Air Temperature (Same as SAT)
OAT - Outside Air Temperature (Same as SAT)