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External microphone, Wiring recommendations, Chapter 2: installation 27 – Sensaphone 1400 User Manual

Page 29

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Chapter 2: Installation

27

+ -

Z O N E

1

+ -

Z O N E

2

+ -

Z O N E

1

+ -

Z O N E

2

+ -

Z O N E

1

+ -

Z O N E

2

4–20mA Transducer

Dry Contact

Input Zones

Terminal Strip

Dry Contact Sensor

NO/NC

Input Zones

Terminal Strip

Temperature Sensor

Thermistor

Input Zones

Terminal 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. (

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, and Sound Level Sensitivity (calibration).

Wiring Recommendations

The 1400 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. 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'