Instructions / Assembly

22
SENSAPHONE 1800 User’s Manual
+ -
ZONE
1
+ -
ZONE
2
+ -
ZONE
1
+ -
ZONE
2
+ -
ZONE
1
+ -
ZONE
2
4–20mA Transducer
Dry Contact
Input Zones
Te rminal Strip
Dry Contact Sensor
NO/NC
Input Zones
Te rminal Strip
Temperature Sensor
Thermistor
Input Zones
Te rminal Strip
External Power Source
4-20mA transducer
VDC
4–20MA
Figure 5: Different Sensor Types connected to the Terminal Block
EXTERNAL MICROPHONE
An (optional) external microphone may be connected to the MIC terminals
to allow remote listen-in capabilities and high sound level detection. (: The
built-in microphone is for message recording only.) An external micro-
phone 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,
and Sound Level Sensitivity (calibration).
WIRING RECOMMENDATIONS
The 1800 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 con-
nected to an earth ground. 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’
When preparing wire for connection to the terminal blocks, strip 4” of
insulation from the conductor (see figure below).
.25"
Figure 6: Wire stripped for connection