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Model 1104 User’s Manual
8
NOTE
The proximity of the audible alarm to the
microphone is extremely important.
Normally, the Model 1104 and the audible alarm
must be in the same room. The maximum
distance can vary considerably depending on the
alarm, the acoustics, and the size of the room.
During an alarm dial-out, the microphone allows four-second
intervals to listen-in to sounds at the Model 1104’s location.
When calling for a Status Report, the microphone permits
listening to on-site sounds for a programmed time interval.
2.9 Alert Inputs
The Model 1104 can monitor up to 4 inputs (represented by the
numbered terminal screws shown in Figure 2-5, below).
2341
GND GND GNDGND
Figure 2-5. Alert Inputs
Inputs are configured as either dry contact or temperature.
An input configured as dry contact can be used with any
normally open (N.O.) or normally closed (N.C.) device.
“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 Model 1104 determines the way inputs
are configured by the type of sensor connected to each alert
input (refer to Chapter 5, Section 5.1).