EN MusiCall Installation manual 6
V14360903
Connecting Wallunits
Connect the Wallunits to the matrix
using a two wire cable. The two wires
supply both power and data. Commonly
unshielded cable can be used. When
installed in a high distorted area
shielded cable is recommended.
The wallunits are connected to the green connectors on the back of the matrix. For
each zone one connector is available.
Wallunits are not polarity sensitive. Each zone can be equipped with two
parallel connected wallunits. Both wallunits control and act in the same way.
This especially can be usefull when a room has more entrances.
Controlling the zone is also possible using the user webpage fort hat specific
zone. Each zone can be independently controlled adjusting volume, EQ and
source settings.
Connecting local audio inputs
The local audio inputs are connected to the two outer pins on the green
connector. Each zone can be equipped with one local audio input.
In contrast to the wallunits, the local audio inputs are polarity sensitive.
Connecting swapping the + and – will not result in damage to the system.
When not connected in the right way no audio will be fed through. The
MRA1 is equipped with an internal gain trimmer to adjust input sensitivity.
To avoid distortion the local audio inputs must be connected using shielded
cable. Best is to use standard shielded microphone cable. The cable shield
can be connected to the ground on the local audio input. If needed the
shield can also be connected to the ground on the matrix.
Isolate local audio input cables from speaker and power cables. Do not
put them in the same cable tray or cable bundle. Isolate cables for local
audio inputs and wallunit cables. Do not use a single multipair cable for
audio and data.
Connecting Consoles
Two paging consoles can be connected to the matrix. The paging consoles
are connected using a four wire cable. Two wires for data and two for audio.
Normally unshielded cable can be used how ever shielded cable is
advisable.
One pair needs to be connected to the central connections, the other pair to
the outer connections. Both pairs are polarity insensitive. When using the
supplied connector cable the red and green wire are connected to the inner
connections, the black and yellow are connected to the two outer
connections.
