European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH
www.e2s.com
Tel: +44 (0)208 743 8880
Document No. D157-00-651-IS
Issue 2
06-03-2023
Sheet 5 of 14
8) Settings
Following illustrations show the settings available for GNExS1
Alarm Horn Sounders. See schematic diagrams D190-06-651.
8.1. SPL Configuration
See Table 1 for product power supply and Sound Pressure
Levels (SPL). Only set volume control to max to ensure SIL2
compliance.
Configuration for DC Units
Figure 6: DC PCBA SPL Configuration.
8.2. Stage Switching Polarity (DC Units)
Switching from positive switching (default) to negative
switching - DC Only.
NOTE:
Max supply is 33V DC
–
if higher DC voltage is
required, use Negative switching.
Figure 8: Stage Switching Polarity.
8.3. Tone Selection
The GNExS Alarm Horn Sounders have 64 different tones that
can be selected independently for the first and second stage
alarms. The tones are selected by operation of the tone setting
DIP switch 1 & DIP 2witch 2 (see figure 6) on the PCB, for
stage 1 and stage 2 respectively.
However please see section 14 which outlines the SIL 2
approved tone available of this tone table.
Default = S2
–
Tone 1
Default = S1
–
Tone 44
(ON = 1, OFF = 0)
Figure 9: DIP switch configuration
The sounder can also be switched to sound the third and fourth
stage alarm tones.
The tone table (D221-95-651-IS) shows the switch positions
for the 64 tones on first and second stages and which tones
are available for the third and fourth stages dependent on the
Stage 1 DIP switch setting.
Following table (Table 3) is a summary of wiring options.
