European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH
Document No. D165-00-001-IS_Issue_4 16-11-22
Sheet 3 of 10
DC Units Second, Third and Fourth Stage
Selection
The Appello unit uses
–ve switching to change
the tone to the second, third and fourth stages.
Warning! : The negative supply must remain
connected to the -(ve) terminal and a link
made from this to the appropriate stage (S2)
terminal otherwise the unit will be damaged.
To change to the second, third or fourth stage
tone, link the -ve supply line to terminal relevant
stage terminal. Ie. for Stage 2 link the -ve supply
to the S2 terminal, for Stage 3 link the -ve supply
to the S3 terminal etc.
AC Units Second, Third and Fourth Stage
Selection
The Appello unit uses Live switching to change
the tone to the second, third and fourth stages.
To change to the second, third or fourth stage
tone, whilst maintaining the ac supply to the Live
and neutral, also link the Live supply line to
terminal relevant stage terminal. i.e. for Stage 2
link the Live supply to the S2 terminal, for Stage 3
link the Live supply to the S3 terminal etc.
