PRT-ATH1 / ACC-ATH1
Protege Temperature and Humidity Sensor
Installation Manual | April 2011
13
5.2
Standard LED Outputs
The PGM Outputs 3 and 4 on the Protege Temperature and Humidity Sensor are internal LEDs that can be used
for user display and warnings.
PGM Number
Description
AExxx:03
Square LED Output (Centre)
AExxx:04
Triangle LED Output (Left)
5.3
Analog Outputs (0-10V/4-20mA)
The Protege ACC-ATH1 Temperature and Humidity Sensor also has two 0-10V or 4-20mA analog outputs that
follow the current values of the temperature and humidity inputs, allowing the sensor to interface to external
control systems. These outputs will be updated even when operating with the Protege System. Each analog
output can be independently configured for either 0-10V or 4-20mA output, but not both at the same time. The
tables below detail what the voltages and currents represent.
Sensor
Analog Value
0V
10V
Temperature (Yellow)
-40˚C (-40˚F)
60˚C (140.0˚F)
Humidity (Gray)
0%
100%
Sensor
Analog Value
4mA
20mA
Temperature (Yellow)
-40˚C (-40˚F)
60˚C (140.0˚F)
Humidity (Gray)
0%
100%
When operating with the Protege System, these outputs default to the voltage setting. When operating in
Standalone Mode these outputs can be configured for either voltage or current output. These outputs, when
enabled, are always present and are not affected by the alarm settings.