Separate monitor circuits are provided for Loud and Quiet outputs, but note that
Special Conditioning is required to perform the monitoring.
There are separate Power Present (PP) LEDs on the module, for Loud and Quiet
outputs, which light when the audibles are being driven. It is recommended that all
audibles connected to an Audible Driver Module are the same type.
• Audible indicators recommended are:
• Sonalert Mallory SC682P
• Askari (Tone22 – variable volume)
The above indicators are functional equivalents. Any audible indicator that operates
from a nominal 12V DC supply and takes a maximum of 18mA may be used as an
alternative to the above.
The Audible Driver Module is mounted on the rear panel in the controller cabinet
using the screws supplied in the KOP. When Loud/Quiet switching is not required,
the Audible Driver Module is connected as shown in Figure 32 below.
In order for the Audible Driver Module to operate, the EN (Enable) “+” and “COM”
connections on the Audible Driver Module must be shorted together. Where it is
desired to switch off the Audible Driver at certain times of the day, the Enable
connections can be connected to the ‘Common’ and ‘Normally Open’ connections of
an I/O card.
When it is desired to switch audibles from Loud to Quiet operation (eg at different
times of day), the Output Link (R40) must be cut, and Quiet audibles must be
connected to Quiet Output + (QU O/P+) with Loud audibles connected to Loud
Output + (LO O/P+). The LQ input “+” and “COM” must then be connected to the
‘Common’ and ‘Normally Open’ connections of an I/O card output, such that the LQ
input is open circuit for Loud operation, and short circuit for Quiet operation.
Where more than 8 audible units need to be driven simultaneously, it is acceptable
to connect up to 4 Audible Driver Modules in parallel to each LSLS output, giving up
to 32 audible units per LSLS output.
Where two or more Audible Driver Modules are connected in parallel, it
is important that the connections for EN and LQ are paralleled so that
the “COM” connections both go to I/O card ‘Common’, and the “+”
connections to I/O card ‘Normally Open’. Do NOT connect “COM” of
one Audible Driver Module to “+” of another. See Figure 33.
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