GAI-Tronics 12599-001 Hot Standby Amplifier Module - Manual (Page 2)

Pub. 42004-375A
Model 12599-001 Hot Standby Amplifier Module Page: 2 of 11
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09/05
Hardware Configuration
The Model 12599-001 Hot Standby Amplifier Module is a printed circuit board assembly (PCBA)
equipped with plug-in type terminal blocks, six high current relays for switching amplifier outputs, and 12
low-power relays for switching amplifier inputs and providing dry contact status outputs.
The module is also equipped with five slide switches for mode select functions, and six LEDs to indicate
actively switched circuits. The fault detection inputs are comprised of a Quad Comparator and Darlington
Array for operating the relay switching circuits.
Installation
The Model 12599-001 Hot Standby Amplifier Module is designed for mounting on 4-inch Snap Trak
®
and measures 12 H
× 4 W × 1.5 L inches (305 × 102 × 31.75 mm).
When installing or replacing this module, be sure to disconnect power for safety. When inserting the
module in SnapTrak
®
, exercise care when pressing the module edges into the SnapTrak
®
to avoid damage
to the module’s printed circuit board and/or components. Once installed in the SnapTrak
®
, be sure the
module edges are secured in the channels so that the module does not dislodge during transport or
operation if subjected to vibration. Also, if this module is used with other (cascaded) modules, a one-inch
(25.4-mm) spacing between modules will facilitate wiring at the edge mounted terminal blocks.
Terminations
The Model 12599-001 Hot Standby Amplifier Module is equipped with modular (plug-in type) terminal
blocks. These modular terminal blocks simplify external wire connections during installation, and
provide quick disconnect if replacement is ever required.
The following is a breakdown of each terminal block and its function(s):
TB1 – is the 12 V dc power input to the module.
TB2 – is a 12 V dc power output to another (cascaded) module or another 12 V dc powered device.
TB3 – is where the Amp-1 through Amp-6 fault inputs connect. The OUT terminal is dc common and
connects to the input side of the amplifier’s internal fault circuit. The RET terminal connects to the
output of the amplifier’s internal fault circuit. Refer to Figure 2.
TB4, TB7, TB10, TB13, TB16 and TB19 – are dry output contacts for Amp-1 through Amp-6 faults
respectively. Each contact set is a form “C” type. The maximum switching capacity for each contact set
is 24 V dc @ 1 amp and can be used for triggering a remote status indicator or an input at a supervised
system device for visual text display.
TB5, TB8, TB11, TB14, TB17 and TB20 – are the audio source and input connections for Amp-1
through Amp-6. The SRC (source) terminals are where the amplifier’s audio source is connected. The
IN (input) terminals are where the amplifier’s input is connected. Be sure to observe polarity markings at
these terminals for proper operation and audio performance. Refer to Figure 3.
TB6, TB9, TB12, TB15, TB18 and TB21 – are the audio output and speaker line connections for
Amp-1 through Amp-6. The OUT (output) terminal is the where the active amplifier output (e.g., 4-ohm,
8-ohm, 16-ohm, 25 V, 70 V or 100 V) is connected. The SPKR (speaker) terminals are where the
designated speaker(s) or speaker line connects to the module. Be sure to observe polarity markings at
these terminals for proper operation and audio performance. Refer to Figure 4.