Centralized audio applications
EST3 Installation and Service Manual 4.3
ATPC Amplifier Terminal Panel Cabinet
Overview
The Amplifier Terminal Panel (ATP), the 3-ATPINT Interface,
RKU series enclosures, and Dukane 125 W or 250 W audio
power amplifiers are the basic components of the Amplifier
Terminal Panel Cabinet (ATPC). Appropriately sized standby
batteries, and in some situations an external battery charger,
round out the equipment required in the ATPC. The ATPC can
be located up to 3,000 ft (914 m) from the 3-ZAxx amplifiers
supplying the audio signals.
Equipment racks
RKU-Series Equipment Racks are designed to support standard
19 in (48.26 cm) wide rack-mount components. These UL listed
enclosures are constructed of 16 gauge steel, and finished in
either white or black enamel.
Interior-facing louvers on the two side panels and the back door
provide ventilation for installed equipment, while maintaining a
flush outside surface for side-by-side stacking of multiple racks.
Six conduit knockouts for 1/2 in or 3/4 in conduit are available
on the top end panel (three on top, three on the flange), and six
on the bottom end panel (three on the bottom and three on the
flange). Three 2.875 in (7.3 cm) diameter cable access holes are
located on the bottom end panel for routing wiring to cabinet
components. The equipment mounting rails on the front of the
rack are recessed 0.625 in (1.59 cm).
The louvered back door attaches to the cabinet with spring
hinges allowing easy field access and door removal. A key lock
is provided on the door for added security. Multiple racks can be
installed side by side where additional cabinet capacity is
required.
The RKU series of 19 in (48.3 cm) equipment racks is used to
house the banked amplifiers and associated equipment. Five
sizes of racks are available to meet all requirements. These are
listed in Table 4, below.
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