National Communications Page 5
INSTALLATION
Each speaker has been allocated two specific pin positions and should
be connected to the DB25 connector as per the diagram and table on
page 6.
Speakers can be located up to 100m from the SSU unit, or greater than
100m from the SSU if low resistance wiring is used.
5) Connect the male DB25 connector (above) to the female DB25
connector fitted to the SPEAKER SWITCHING UNIT (SSU).
6) Using the 3.5 mm to 3.5 mm Audio cable that is supplied with the SSU,
connect the AUDIO output from the TDU into the AUDIO INPUT 1 port of
the SSU.
7) The SSU also allows for a primary audio feed, if connected, that will
be supplied to all speakers at all times.
This primary audio feed will then be replaced by the TDU message, only
on the appropriate speaker, whenever the TDU is triggered.
The primary audio feed is then reconnected at the end of the TDU
message.
The primary audio feed connects to the AUDIO INPUT 2 port.
8) Install the TALKING DISPLAY UNIT (TDU) and the MULTIPLE INPUT
UNIT (MIU) as per the separate instructions supplied with each unit.
9) Adjust the Audio Volume output of the TALKING DISPLAY UNIT (TDU)
to requirements.
10) Adjust the Audio Volume output of the primary audio feed (if used)
to requirements.
11) Complete connection and set up of the MIU unit and TDU unit as per
the instructions within the User Guide supplied with each of these
devices.
12) Test your system by triggering each switch connected to the MIU
unit.
