System overview
The Bosch PLENA matrix product range consists of high-quality products and is the ideal
solution to perform zone announcements, with excellent speech intelligibility and background
music, in a wide variety of public address areas.
The system is designed for maximum flexibility to suit almost any application. The installation
of is quick and easy, because the system uses CAT‑5 cables to connect accessories and
amplifiers to the DSP matrix mixer.
PLENA matrix product range comprises:
–PLM-8M8 – 8 Channel DSP Matrix Mixer:
The digital signal processor (DSP) Matrix Mixer is the heart of the PLENA matrix system. When
combined with the Call Station (PLM‑8CS) and the Wall Control Panel (PLM‑WCP) making
announcements and controlling individual zones is easy. The multi channel DSP amplifiers
(PLM‑4Px2x) can be connected via STP type CAT‑5 (Amp Link) or via phoenix terminal
connectors. The internal audio matrix can control announcements (via the call station), mix
four mic./line inputs, and select any of the three background music sources and deliver these
to a total of eight independent zone outputs. There is also a logic input for emergency override
that will take priority over all other inputs. Control of the DSP features is via Ethernet
connection and use of the product GUI of Windows or iPad.
–PLM-4P125 and PLM‑4P220 – Multi channel DSP Amplifiers:
With the exception of the power output, both Class‑D multi channel DSP Amplifiers are
virtually identical in features. The amplifiers come with advanced DSP features which are
accessed by the PC GUI. Both amplifiers feature the “Amp Link” CAT‑5 cable connection to
connect easily to the PLM‑8M8 DSP Matrix Mixer. Loudspeaker outputs are for 100 V, 70 V,
8 Ohm and 4 Ohm operation. The amplifier channels can also be bridged together to make
more powerful outputs. The amplifiers also feature an auto standby mode that significantly
reduces the power consumption making the amplifiers more cost effective and
environmentally friendly.
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PLENA matrix System overview | en 9
Bosch Security Systems B.V. Operation manual 2013-06 | V1.0 |