Audica MULTI zone - Manual (Page 7)

7
k) LOOP input and output connectors
These are 15-pin D-type connectors (male for Loop out, female for Loop in) for looping the audio inputs (and optionally Mic, Mute
and RS-232) to other units. Up to a total of 7 MULTIzone units can be linked in this way. When a unit has a loop cable connected to
its LOOP IN socket it becomes a “Slave”. The unit which has nothing plugged into its LOOP IN socket is the Master unit. See Appendix
3 for further details.
l) MUTE input
Some buildings require that the music system is muted if the fire alarm is triggered. Two types of input are provided on the unit for
this purpose - on a 4-way Phoenix connector.
The first two pins accept a DC voltage input (5-30V) for muting.
The third and fourth pins may be wired to Normally Open isolated contacts (e.g. a relay activated by the fire control panel).
The sense of the Mute input can be reversed by an internal jumper such that a Normally Closed contact or absence of the 5-30V
causes muting instead. The internal jumper, plugged into CON302, is located at the front edge of the main PC board, adjacent to the
left hand ribbon cable from the front panel – see below
l
k
Location of jumper V=not muted or NC contacts
Location of jumper V=mute or NO contacts (default)