Chapter 2: Installation
9
“Open” refers to an opened circuit path; if conditions cause the
circuit to close, an alert condition occurs. “Closed” refers to a
continuous circuit path; if a closed circuit is opened, an alert
condition occurs. The OMA-P1104 determines the way inputs
are configured by the type 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 OMA-P1104 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 num-
bered screw and the other lead to GND. Tighten both screws. If
the input was not disabled, the OMA-P1104 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.