Audible Driver Module; Audible Driver Module - Single Output Type (Obsolete) - Siemens ST950ELV Handbook

4.15

Audible Driver Module

4.15.1 Audible Driver Module - Single Output type (obsolete)

The original style of Audible Driver Module (pictured in Figure 28 below) was able to
drive either loud or quiet audible indicators, but not both. This module has been
superseded by an updated version (see section 4.15.4) which offers backwards
compatibility, but also permits both loud and quiet audible indicators to be driven
from a single module. Information on the original single-output module is retained
here to allow servicing of the original module.
In order to drive audible indicators, an Audible Driver Module Kit of Parts is
required. The module is powered from the phase Green of the relevant pedestrian
phase output of the LSLS card and provides a regulated 12V DC to the audible
indicators.
The module can be connected to an I/O card to allow operation to be inhibited (for
example at night).
The Audible Driver Module will operate at both dim and bright lamp voltages.
Figure 28 – Audible Driver Module – Single Output type
The Power Present (PP) LED on the module lights when the audibles are being
driven. Each Audible Driver Module can drive up to 8 audibles. It is recommended
that all audibles connected to an Audible Driver Module are the same type.
Audible indicators recommended are:
• Sonalert Mallory SC682P
• Highland Electronics SC682P
• Roxborough SPCI535A4
• 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.
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Version 7
Last Editor manpreet.jeerh
Document Name ST950 ICM Handbook
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Page 63 of 154
Status Issued
Date January 2020
Document No. 667/HE/45950/000