INSTRUCTION SHEET FOR FEDERAL SELECTFONE
®
INTERCOM/PAGING SYSTEM
I. GENERAL
The SelectFone
®
intercom and paging systems are designed for voice communication for indus-
trial environments where the communication equipment is installed in high-noise areas, corrosive
atmospheres, hazardous areas, and extremes of temperature, dust, and humidity. The intercom
system allows the operator to both page instructions over the 15-Watt, 8-Ohm speakers and have
two-way conversations between two or more people on a telephone party line. With a five-channel
intercom system multiple communication links can be established simultaneously without cross
talk or interference.
Ease of installation, simplified operation, simplified maintenance, unrestricted expansion, and
unshielded cable are some of the benefits of the Federal Signal SelectFone intercom system.
Typical installations include power plants, metal processing plants, mining operations, petroleum
and chemical plants, paper mills, water treatment facilities, and manufacturing, packaging, and
processing plants.
A typical SelectFone intercom station features an impact resistant, Cycolac® handset with noise
canceling dynamic transmitter, and a receiver with a built-in push-to-page switch for one-hand
operation. The front panel of each unit features a handset cradle equipped with a contact-less sensor
to indicate an off-hook condition, an ‘off-hook’ indicator LED, and channel selector switch (on
five-channel stations). In wall mount units, the 12-Watt paging amplifier, handset preamplifier,
and power supply are enclosed in the housing. Desktop and panel mount units are equipped with
the cables and connectors required to connect to the Remote Subset (within 10 feet), containing
the paging amplifier, power supply, and handset amplifier. The amplifier and power supply as-
semblies features a plug-in design for ease of installation and service. Each unit is equipped with
a terminal block for simplified installation.
II. SPECIFICATIONS
COMMON SPECIFICATIONS FOR ALL MODELS
Power Requirements
Operating voltage
105-130 VAC 50/60 Hz, 21 to 28 VDC (Nom. 24 VDC)
Standby Power Consumed
10 VA 120 VAC, 3 watts 24VDC
Operating Power Consumed
33 VA 120 VAC, 28 watts 24VDC max
Handset Amplifier
Output
1.5VRMS max. into 33 ohm load
Voltage Gain
68dB adjustable
Frequency Response
250-6500 Hz +/- 1.5 dB
Distortion
2% THD max at 1000 Hz
Controls
Microphone Gain, Receiver Volume
Speaker Amplifier
Output
12 Watts into 8 or 16 ohm load
Voltage Gain
31dB adjustable
Frequency Response
250-12000 Hz
Distortion
Less than 2% THD at 12 watt, 1000 Hz
Input Impedance
50k ohm
Output Impedance
8 ohm or 16 ohm
Controls
Speaker Volume Adjustable
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