Bogen TBA-15 Installation And Adjustment Instructions

BOGEN
COMMUNICATIONS, INC.
PAGING/TALKBACK AMPLIFIER
TBA-15
INSTALLATION AND ADJUSTMENT INSTRUCTIONS
FCC Registration No. under Part 68 Rules: CD272Q-17147-KX-N
Ringer Equivalence: 0.0B
The Bogen Model TBA-15 is a fifteen-watt paging/talkback
amplifier which complies with Part
68
of
FCC
rules. The unit per¬
mits two-way communication between a telephone handset, and
one (or more) zone(s) of remote loudspeakers. When used with
optional Bogen accessories, paging to up to nine separate zones of
loudspeakers is possible.
The TBA-15 senses and automatically switches the direction of
conversation from telephone to loudspeaker without the use of
relays or other moving parts. Control of speech direction is main¬
tained at the telephone handset. Controls are provided to adjust
the switching sensitivity, switching delay, and loudspeaker and
talkback (handset) volume levels.
The
TBA-15
has a talkback frequency response which has been
shaped for maximum intelligibility and background noise rejection.
Switching delay time is adjustable from less than 50ms to greater
than 0.5 seconds to ensure an intelligible flow of conversation.
A "power on" LED, circuit breaker, and speaker volume control
are located on the front panel. A recess in the panel, protected by
a removable cover, houses the 600-ohm transformer-coupled tele¬
phone line input,
25V
and
70V
constant voltage outputs, and
muting terminals (for one-way paging). Controls to adjust sen¬
sitivity, switching delay and talkback volume are also located within
the panel recess.
The amplifier operates from a 120 volt, 60Hz, AC source. A
press-to-reset circuit breaker protects the unit from excessive cur¬
rent flow. Safe Operating Area (SOA) and thermal protection safe¬
guard the output device. The unit is finished in textured black
enamel and mounts easily on a wall backboard or in standard 19"
equipment racks.
INSTALLATION
Warning
To prevent fire or shock hazard\ do not expose this equip-
merit to ruin or moisture. There ate no user serviceable
parts within this equipment. Removal of the cover presents
an electrical shock hazard. Have all internal service per¬
formed by qualified service personnel.
UNPACKING: This equipment was carefully checked before leav¬
ing the factory. Inspect the unit and shipping carton for indications
of improper handling. In case of damage, make an immediate claim
to the dealer or distributor from whom the unit was purchased. If
the unit was shipped to you, notify the transportation carrier
without delay and place a claim.
MOUNTING: Avoid proximity to heat sources and strong magnetic
fields. Provide for adequate ventilation for chassis heat dissipation.
To eliminate possible cross talk interference, do not run input and
output lines close together and route through separate knockouts
on the terminal strip cover.
For wall-mounted installation, locate two top screws 18-5/16"
apart, allowing the screw heads to protrude 1/8" to 1/4". Fit the
chassis onto the screw heads at the keyhole slots and position two
bottom screws. Complete the installation by tightening all screws
securely. For best support, use self-fastening hardware when
mounting the unit to plasterboard or similar thin materials. The
unit weighs 7 lbs.
For rack-mounted installation, install the unit facing into the
rack. A blank panel may be used to cover the exposed rear surface
of the amplifier. Secure the unit and blank panel with the same
screws.
POWER AND GROUNDING: The AC line cord is terminated in
a three-prong plug, which should be plugged into a three-wire,
grounded outlet. It is important to ground the amplifier proper¬
ly. "Pigtail" adaptors may be used only when properly connected to
a grounded outlet. A front panel LED illuminates when power is
applied to the unit.
CONNECTIONS
All connections to the TBA-15 are made through a screw ter¬
minal strip (Figure 1), located within a recess oil the amplifier front
panel. Keyhole slots on the recess cover allow for quick access to
terminal connections. Knockouts are provided on the cover to
admit wiring. Run input and output wiring through separate knock¬
outs.
Printed In U.S.A. 8807 54-5870-01