Sensaphone 2800 - Manual (Page 31)

Chapter 2: Installation
29
walls, the reliable wireless distance will be reduced.
When the 2800 is communicating directly with the sen-
sors, the line-of-sight distance is 300 feet, and a typi-
cal indoor distance with obstructions is approx. 100
feet. When the 2800 is communicating with a repeater,
the line-of-sight distance is 4,000 feet, and the typical
indoor distance with obstructions is approx. 300 feet.
Experimentation may be required to determine actual
wireless range.
External Microphone
An (optional) external microphone may be connected to the MIC
terminals to allow remote listen-in capabilities and high sound level
detection. (
NOTE: The built-in microphone is for message recording
only.) An external microphone with a 25' cable may be ordered from
your Sensaphone supplier: Part number FGD-0057. The microphone
connects to the terminals labeled MIC. Be sure to observe proper
polarity when connecting the microphone: Red wire to
+ and Black
wire to – . See Chapter Five for information on programming the
Listen-in Time, High Sound Alarm Recognition Time (Chapter 4 –
p46), and Sound Level Sensitivity (calibration) (Chapter 4 – p53).
Wiring Recommendations
The 2800 will work fine in indoor environments using unshielded
cable. When wiring will be subject to long lengths (>250') or if
run outdoors, it is highly recommended that shielded cable be
used and that the shield be connected to an earth ground. Shielded
cable should also be used in electrically noisy environments (heavy
equipment, pumps, VFDs, etc). Also, be sure to use the appropriate
gauge wire based on the distance and sensor type. See chart below:
Wire Gauge Thermistor NO/NC Contact & 4–20mA
#24 250' 1000'
#22 500' 2000'
#20 1000' 4000'