Federal Signal AR2000-M Manual De Instalación Y Mantenimiento página 8

CAUTION
If too small a wire gauge is used, unacceptable
signal voltage drop in the signal line will cause
reduced sound output from the remote signal
device. Only use a cable having wire gauge
greater than 22AWG.
B. Federal does not recommend that new or
existing telephone lines be used as signal lines in
an Audio Router system for the following reasons:
1. Interference from other services or systems, or
interference from the system to other services.
2. Cross talk, interference or hum induced by other
telephone lines.
3. Extended downtime because of the second party
involvement required to service the lines.
4. The additional cost of installation, interfacing devices
and monthly charges as opposed to a one-time cost
of performing the installation.
3-5. MODEL AR2000-M SIGNAL CONNECTIONS.
CAUTION
Crosstalk can occur between signal lines and
power lines, causing confusing messages, which
interfere with the capability of this equipment.
Do not install signal lines in the same conduit with
power lines. Avoid routing signal lines on cable
trays with high voltage power lines.
To connect the signal lines of the system to the
AR2000-M, connect a color-coded shielded twisted pair
of audio cables having conductors no smaller than 18
AWG to + and - of each zone output being utilized to
the appropriate remote device(s). (See figure 3-1.) Every
remote signaling device in the system will be connected
in parallel to these lines. When connecting the remote
devices in parallel to the signal lines, observe the correct
polarity and install wire nuts over the connections.
NOTE: If using the supplied amplifier or an external
amplifier, the output audio must be connected using
appropriate wire from AUDIO OUT to AUDIO IN FROM
EXTERNAL AMP. If using the on-board amplifier, directly
connect the AUDIO IN FROM EXTERNAL AMP to the
AUDIO OUT terminals on the back of the AR2000-M. See
section 3-4 for recommended wire sizes.
3-6. CONNECTION TO REMOTE DEVICES.
Physically install the remote device(s); follow the
installation instructions packed with the device.
A. 300GC, 300GCX, 300X, 302GC, 302GCX,
302X, 50GC, and 50GCB.
To connect these models to a 25Vrms or 70Vrms
signal line, a Model AM25CK or AM70CK connector card
must be used. See figure 3-1 and instructions below for
the appropriate signal line voltage.
B. 70 Vrms Signal Line Application.
The AR2000-M has provision for connecting 70
Vrms line operated speakers to its output. Connect
the 70 Vrms line at the terminals of Zone 1 – Zone 8
terminal block(s). Connect the speakers in parallel to this
line using 70 Vrms line tap. This output is selected by
setting the switch on the back of the AR2000-M to the
70 Vrms position. The output audio must be connected
using 16GA wire from AUDIO OUT to AUDIO IN FROM
EXTERNAL AMP. The Gain may be adjusted using the
AUDIO OUT VOLUME control knob.
C. 25 Vrms Signal Line Application.
The AR2000-M has provision for connecting
25Vrms line operated speakers to its output. Connect
the 25Vrms line at the terminals of Zone 1 – Zone 8
terminal block(s). Connect the speakers in parallel to this
line using 25Vrms line tap. This output is selected by
setting the switch on the back of the AR2000-M to the
25Vrms position. The output audio must be connected
using 16GA wire from AUDIO OUT to AUDIO IN FROM
EXTERNAL AMP. The Gain may be adjusted using the
AUDIO OUT VOLUME control knob.
D. Low Level Audio Output.
The AR2000-M also has provision for 1 volt audio
output that can be switched to each zone for individual
external amplification. This low level output is available
at the same terminals as in B and C above. This output
is selected by setting the switch on the back of the
AR2000-M to the 1 Vrms position. The output audio must
also be connected using 18-20GA wire from AUDIO OUT
to AUDIO IN FROM EXTERNAL AMP. The Gain may be
adjusted using the AUDIO OUT VOLUME control knob. It
can also be connected to an analog fiber optic transmitter
so that audio can be transmitted over a fiber optic link in
an electrically noisy environment.
E. External Amplifier Connection for Alternate
Power Audio Output.
The AR2000-M also has provision to connect an
external amplifier, such as the Federal Signal HP440,to
be switched to the corresponding zones. Set the Audio
Router up as listed in D above. Connect the 1 volt AUDIO
OUT to the audio input of another amplifier. The output
audio must be connected using appropriate wire gauge
for the application to the AUDIO IN FROM EXTERNAL
AMP (See figure 3-2.) The Gain may be adjusted using
the AUDIO OUT VOLUME control knob.
Careful attention should be paid in order to make
sure orientation of the signal is not reversed.
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CAUTION