A & E Specifications

Architects’ and Engineers’ Specification
PLM+
™
Series: Powered Loudspeaker Management
™
W W W . L A B G R U P P E N . C O M
Connectors, Network, and User Interfaces
Power Supply, Protection, and Cooling
The power supply shall be a universal regulated switch
mode type operating at voltages from 70 V to 265 V at line
frequencies of 45 Hz to 66 Hz. Under-voltage limiting shall
enable continued operation with line sags as low as 65 V. A soft
start circuit shall limit current inrush at power-up to 8 A. A
power average limiter shall incorporate a software-control breaker
emulation to prevent tripping of mains fuses. The amplier shall
be cooled by four temperature-controlled, variable-speed fans,
with air ow from front to back
Physical
The unit shall be 483 mm (19 in.) wide, 88 mm (3.5 in / 2 U)
high, and 498 mm (19.6 in.) deep including handles and rear
support. The weight shall be 11.4 kg (25.1 lbs). The chassis housing
shall be black painted steel with a black painted steel and aluminum
front surround and handles. The unit shall be approved for use as
specied by CE, ANSI / UL 60065 (ETL), CSA C22.2 NO. 60065,
PSE, RCM, FCC and CCC. The unit shall be the Lab.gruppen PLM
5K44.
PLM 5K44
Overview and Functions
The unit shall comprise a four-in/four-out digital loudspeaker
drive processor with power amplier outputs. Additional
capabilities and facilities shall include load verication and real-
time performance monitoring; low-latency,
Ethernet-based audio
networking; third-party control system compatibility using
custom middleware; control and monitoring of internal para-
meters from a remote computer; and optional software
integration of industry-standard acoustical measurement tools. All
control, monitoring and measurement facilities shall be remotely
accessible via a custom PC software interface supplied with the
unit. The included integrated software package also shall include a
custom amplier conguration interface and additional features to
expedite system design, specication and commissioning.
Digital Loudspeaker Processing
Power Amplier
Maximum total power output shall be 5000 W or 1250 W per
channel nominal @ 4 ohms. The amplier topology shall allow
exibility in output power management, with the capability to
allocate total available power across output channels as needed for
the application. Any channel shall be capable of being signicantly
scaled up in order to distribute the output power, up to 2000 W into
optimal impedance. Maximum peak output voltage shall be 150 V
and maximum output current shall be 30 A. The amplier shall
incorporate power factor correction (PFC) to reduce requirements
on the mains distribution system. Amplier gain shall be digitally
congurable from 22 dB to 44 dB. The unit shall exhibit the
following performance parameters: Frequency response shall be
20 Hz – 20 kHz ± 0.05 dB (1 W into 8 ohms). Dynamic range
shall be >112 dB. Propagation delay shall not exceed
1.61 ms for
AES3 input (96 kHz) or 1.68 ms for analog input. The unit shall
incorporate a DSP-implemented zero overshoot voltage peak limiter
adjustable per channel for voltage threshold and prole.
Load Verication and Circuit Protection
The unit’s DSP and on-board ermware, in conjunction with
supplied PC control software and loudspeaker database, shall
enable the unit to verify that loudspeaker loads are connected as
intended, and to identify defective drivers or faulty wiring. The
DSP and associated software also shall allow real-time monitoring
of critical performance parameters for both the power amplier
section and connected loudspeakers. Circuits and sensors shall be
provided for warning and protection against VHF (Very High
Frequencies), DC at output, over-temperature, open load, excessive
current, and voltage peak clipping.
Item no. AES-PLM5K44_V2 - 21.02.2018
The unit shall include four discrete modules of digital
loudspeaker processing. Audio inputs shall be analog with oating
ground isolation, AES3 digital, AES67 and dual redundant Dante
Ethernet-based network. Auto failover switching among inputs shall
be user programmable. Facilities shall be provided for exible input
mixing and routing. DSP capabilities shall include raised
cosine equalization, FIR, linear-phase and classical crossovers, and
peak and RMS limiters.
The rear panel shall provide inputs for analog signals on four XLR-F
connectors and for AES3 digital signals on two XLR-F connectors.
In addition, two etherCON
®
housed RJ45 Ethernet jacks shall be
provided for AES67 and Dante networked digital audio as well as
monitoring and control via remote PC. The unit shall be compatible
with use as part of a low-latency, self-conguring digital audio
network that supports sampling frequencies of 48 and 96 kHz.
Output connectors on the unit shall be both binding post and
Neutrik
®
speakON
®
(4 x NLT4). The front panel user interface shall
include a high-brightness 2.5-inch LCD panel, a moisture-resistant
silicone touch pad, and a rotary encoder. The user interface shall be
menu-driven, with screen displays and soft-keys accessing functions
of the digital loudspeaker processor and the power amplier.
Dedicated keys shall be provided for Mute Enable, Meter and Menu
functions. Multicolor LEDs shall indicate presence of any warning or
fault conditions. The unit shall be supplied with a custom software
program for comprehensive monitoring of system status and
operating parameters, as well as control of DSP and amplier
functions. The software program shall be compatible with use on a
Tablet PC, and shall offer plug-in integration of proprietary audio and
acoustical measurement tools in the same user interface.