E2S A141 User manual

INSTRUCTION MANUAL
A141 High Level Audible Warning System
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH
[email protected] Tel: [phone]
www.e2s.com Fax: [phone]
Document No. D161-00-001-IS_Issue_C 12-02-13
Sheet 1 of 5
1) Introduction
The A141 high level audible warning system is an
effective wide area warning alarm system and
can be used where there is a requirement to
attract attention over large areas and also where
potential high levels of background noise exist.
The system comprises of a central control unit
which is configured to drive an audible horns
containing four driver units.
The control unit produces forty five different alarm
sounds (tones) that are selectable using an
internal dipswitch (see tone table page 3 for
available tones) including a stage 2 and stage 3
alarm option.
Each audible horn is capable of producing a
range of loud warning signals with output levels
at one meter of approximately 141dB(A)
depending on tone selected.
Both the control unit and horns are suitable to
mount either indoors or outdoors in a number of
mounting configurations with ingress protection to
IP65.
2) Operating and Marking
All units have the following operating
requirements and limitations.
Audible Horn Units
Unit Type No.: A141
Operating Temp: -20 to +55C
IP Rating: IP65
Control Panel
Unit Type No. A141xxxxxG (dependent on
variant chosen see table 1)
Input Voltage:
24V DC (18V to 30V DC range)
115 or 230VAC (90V to 264V AC range)
Operating Temp: -20 to +55C
IP Rating: IP65
Marking:
3) Installation Requirements
Always de-energize control unit before removing
cover.
The installation of the units must be in
accordance with any local codes that may apply
and should only be carried out by a competent
electrical engineer who has the necessary
training.
3) Power Supply Selection
It is important that a suitable power supply is run
the control unit. The power supply selected must
have the necessary capacity to provide the input
current to the control unit.
The following table shows the input current taken
by the various control unit configurations units:-
DC Unit Type Input Input Range.
No. Horns Voltage Current I/P Volts
A141DC24G 18-30V DC
24V DC 13.2A
AC Unit Type Input Input Range.
No. Horns Voltage Current I/P Volts
A141AC230G 90-264V AC
115V AC 4.2A
230V AC 1.95A
Table 1: Variants and power requirements
Current levels shown above are for the nominal
input voltage. The input current will vary
according to the voltage input level and the tone
selected.
The above table also shows the maximum and
minimum voltages at which the control units can
be operated.
4) Cable Selection
When selecting the cable size consideration must
be given to the input current that the control unit
draws (see table above) and the length of the
cable run.

INSTRUCTION MANUAL
A141 High Level Audible Warning System
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH
[email protected] Tel: [phone]
www.e2s.com Fax: [phone]
Document No. D161-00-001-IS_Issue_C 12-02-13
Sheet 2 of 5
5) Earthing
AC powered control units must be connected to a
good quality earth. The unit is provided with
internal earthing terminal which is located next to
the power terminal (See figure 2).
6) Horn Location and Mounting
The location of the horn should be made with due
regard to the area over which the warning signal
must be audible. The horn should only be fixed to
services that can carry the weight of the unit.
The horn should be securely bolted to a suitable
surface using the stainless steel U shaped
mounting bracket. The angle can then be
adjusted in the direction that the sound is
primarily required to cover. This can be achieved
by loosening the two large bracket bolts in the
side of the unit, which allow adjustment. On
completion of the installation the two large
bracket adjustment bolts on the side of the unit
must be fully tightened to ensure that the unit
cannot move in service.
7) Control Unit Location and Mounting
The location of the control unit will depend on the
level of customer accessibility required. The
control unit should only be fixed to services that
can carry the weight of the unit.
The control unit is mounted using 4 off suitable
screws in the mounting positions given on
installation figure 1.
Fig 1 Control Unit mounting Installation

INSTRUCTION MANUAL
A141 High Level Audible Warning System
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH
[email protected] Tel: [phone]
www.e2s.com Fax: [phone]
Document No. D161-00-001-IS_Issue_C 12-02-13
Sheet 3 of 5
8) Wiring of Control Unit to Power and
horn units
For wiring schematics see figures 3a, 3b & 3c.
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.
The individual cores are numbered 1 to 8 and
connect the four drivers from the horn to the four
PCBA’s in the control unit in pairs: 1+2, 3+4, 5+6
and 7+8.
The four PCBA’s in the control unit are pre-wired
with an 8 way terminal block to which the 8 core
cable should be connected. The connections
should be made in sequence as shown on the
terminal connection label in the control unit.
9) Tone Selection Table
The A141 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 for both DC and AC units. The
tone table below shows the switch positions for
the 45 tones and which tones are available for
the second and third stages. To sound stage one
simply connect the supply voltage (+ve and –ve)
for DC units and (L, N and E) for AC units, to the
supply input terminals in the control unit.
Table 2: Tone selection table

INSTRUCTION MANUAL
A141 High Level Audible Warning System
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH
[e-mail] Tel: [phone]
www.e2s.com Fax: [phone]
Document No. D161-00-001-IS_Issue_C 12-02-13
Sheet 4 of 5
Terminal on
master PCB
S2 / S3
connections
- S2 S3
S3 and S2 header
pins for –ve and +ve
switching
(-ve position shown)
Dip switch for
tone selection
(1 0 0 0 0 0 position shown)
The operation of the second and third stages is
different for DC and AC units.
DC Units Second and Third Stage Tone Selection
The A141 audible alarm system has the facility to
use either +ve or –ve switching to change the
tone to the second and third stages. For –ve
switching connect the two pin headers on the
master pcb to the –ve and centre pins (see
figures 2 & 3b). For +ve switching connect the pin
headers to the +ve and the centre pins (see
figure 3c).
To change to the second stage tone, connect
either a -ve or +ve supply line to terminal S2 on
the master pcb, depending on which switching
mode is being used while maintaining the dc
supply to the +ve and –ve control unit input
terminals. Similarly for the third stage tone,
connect a -ve or +ve supply line to terminal S3 on
the master pcb. The supply to the S3 terminal will
automatically override a supply to the S2
terminal.
AC Units Second and Third Stage Tone Selection
To select the second and third stage tones on the
A141 audible alarm system, connect the -ve
terminal on the six way terminal block on the
master pcb to the S2 terminal for the second
stage tone and the S3 terminal for the third stage
tone (see figure 3a).
Figure 2 Layout of wiring in control unit
Master control board
Terminal block for
customer power input
Note:
Photo depicts A131
version control unit
with 4 speaker output
cable glands. The
A141 requires only 1
speaker connection
cable gland (supplied).

INSTRUCTION MANUAL
A141 High Level Audible Warning System
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH
[e-mail] Tel: [phone]
www.e2s.com Fax: [phone]
Document No. D161-00-001-IS_Issue_C 12-02-13
Sheet 5 of 5
Fig 3a: Schematic Circuit
Diagram of AC unit with
stages S2 and S3 with
negative switching
Fig 3b: Schematic Circuit
Diagram of DC unit with
stages S2 and S3 with
negative switching
Fig 3c: Schematic Circuit
Diagram of DC unit with
stages S2 and S3 with
positive switching