INSTRUCTION MANUAL
A131 High Level Audible Warning System / Battery backup
European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH
Tel: +44 (0)208 743 8880
www.e2s.com
Fax: +44 (0)208 740 4200
Document No. D5423-D5426-IS_Issue_B 12-02-13
Sheet
3
of
5
Fig 1-2 Battery Installation
There is a set of contacts that change over on a
system fault, this includes a battery fault or a
charging fault.
9) Wiring of Control Unit to Power and
horn units
For wiring schematics see figures 3. The control
unit needs to be wired to a suitable power supply
cable supplied by the customer. The power
terminals on the control unit are clearly marked
and will accept up to 2.5mm
2
cable. See figure 2.
The cable from the horn to the control unit is 10m
in length. It should be fed through the cable gland
in the control unit and then wired into the terminal
block provided.
To keep horns in-phase ensure that the red horn
cable is connected to the brown and the blue to
the blue. See figure 3.
As all the sounder units are synchronized it does
not matter which unit is cabled into which board.
10) Tone Selection Table
The A131 high level audible warning system has
45 different tones that can be selected for the first
stage alarm. The systems can then be switched
to sound second and third stage alarm tones. The
tones are selected by operation of a DIP switch in
the control unit.
The tone table below shows the switch positions
for the 45 tones and which tones are available for
the second and third stages.
Table 2: Tone selection table
