C l e a r l y b e t t e r s o u n d
Block Diagram
RJ45
RJ45
The LM-2 is exceptionally simple to install; the rear OUTPUT
connector is wired to one of the host unit’s Facility Ports with a
single screened Cat 5 cable using standard shielded RJ45 connectors
at each end. The Cat 5 cable carries DC power as well as balanced
audio.
Each Zone on the host unit has its own Facility Port, and any LM-2s
connected to a particular port will provide inputs to that Zone only,
and source/level control of the background music in that Zone only.
A second RJ45 connector is provided to permit multiple LM-2s to
be “daisy-chained” together, to provide insert points at different
Connections
locations in the same Zone. Signals applied to modules wired in this
way will be summed together to the Facility Port to which the “last”
LM-2 in the chain is connected. An internal gating circuit on each
module automatically disables the audio circuitry on any chained
modules which are not in use, to minimise noise contribution.
LM-2s are powered from the host unit to which they are connected,
and each takes 12 mA at +15 V and -15 V. In the vast majority of
installations, the host unit will have ample spare power capacity
for several LM-2s. Full details are provided in the host unit’s
documentation.
LINK
LINK
OUTPUT
OUTPUT
LM-2
(UK version illustrated)
Connect to
OUTPUT socket
Connect to
OUTPUT socket
Connect to
FACILITY PORT
Screened
Cat 5 cable
Screened
Cat 5 cable
Connect to
LINK socket
