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PA8500-VES
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Voice Evacuation System
PMD range • Class “D” modular amplifiers
Careful design and a choice of very reliable hi-tech components led to
the creation of this range of Class D amplifiers, featuring an extremely
compact size and low energy consumption. Each has its own diagno-
stics card for testing correct operation and checking soundness of the
loudspeaker line and a double output circuit with separate controls
(A and B) for creating systems featuring line redundancy; if a short
circuit is detected on one of the two outputs, this line is automatically
disconnected to enable proper operation of the other. These modu-
lar amplifiers require a PMS2001 card-cage for mounting on a 19”
rack.
PMD
amplifiers, connected directly to the CR8506-V controller
by means of CAT5 shielded cable, can be used to create high-power
areas. It is possible to connect up to 16 PMD units in cascade fashion
to each of the six output lines (zones) of the CR8506-V. It is possible to
configure one amplifier in each group as a stand-by unit. The fact that
each amplifier is powered independently makes the system extremely
reliable and in line with safety standards.
PMD500-V
PMD125-V
PMD250-V
functional features
General features
• Operation on 230 VAC and 24 VDC
• Both stand-alone and remote-controlled operation are possible
• Double RJ45 input socket (for connecting more than one amplifier
in parallel)
• Two audio inputs
• Front-panel LEDs indicating the output level or the operational
status of the amplifier
• Forced fan cooling with an electronic control and protection circuit
• Output terminal block of the removable bayonet type
Local controls or via serial communication
• Output volume control
• Selection of the amplifier input
• Activation of the low-cut filter
Diagnostics
• Diagnostics of the main functions of the amplifier
• Checking and measurement of the impedance of the loudspeaker
line (A and B)
• Check and exclusion of short-circuited loudspeaker lines
• Check of earth connections (GND FAULT)
special applications
PMD amplifiers can also be used without a PA8500-VES system whe-
never small layout dimensions combined with great reliability are re-
quired.
They can be controlled by means of configuring dip-switches on the
rear of each unit or by means of a simple RS485 communication pro-
tocol, with complete supervision of the loudspeaker line connected to
them. The communication protocol is compatible with the PMS2000-
VES modular system. In addition to all the operations and/or checks
set locally by means of the dip-switches, it will also be possible to view
and modify all the parameters, including the following:
• reading of the reference impedance for the test
• minimum and maximum values within which the test is applicable
• reading of the test status
• testing of inputs
• measurement of the temperature of the end transistors
• volume control
PROTECTION DEVICES
In addition to conventional protection in the form of fuses, these am-
plifiers have electronic protection devices and circuit-breakers with
automatic resetting, protecting them from the possible risk of damage
due to overloads.
The front-panel LEDs have a dual function as VU Meter (in normal
conditions) and for indicating the types of any failures detected by the
control card.
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