of sensor connected to each alert input (refer to Chapter 5,
Section 5.1).
An input configured as “temperature” is designed to evaluate a
range of settings. The Model 1104 will read the temperature at the
sensor’s location and compare that value to programmed high and
low temperature limits. Temperature inputs must be used with
Phonetics Remote Temperature Sensor.
NOTE
Before wiring, it is advisable to disable the inputs to
prevent accidentally tripping an alarm. See Chapter 5,
Section 5.2.
2.10 Installing the Sensor
After you have selected the sensor, loosen the screw of the alert
input and its corresponding ground. Two wire leads are used to
connect any monitoring sensor. Fasten one lead to the numbered
screw and the other lead to GND. Tighten both screws. If the
input was not disabled, the Model 1104 may recite its “Alert
Condition Exists” message as you connect the sensor. If it does,
just press any key to stop it. Re-enable the input after wiring.
Refer to Figures 2-6 and 2-7 for connecting a sensor to an alert
input.
Figure 2-6. Sensor Connected to an Alert Input
Any sensor can be attached to the Model 1104 using 22-gauge
wire. The sensor can be several hundred feet from the unit, as
long as the total resistance of the circuit is not greater than 50
ohms. Use wire appropriate for the application.
