STAGE WIRING
DC Units Stage 1 operation:
DC Units Second, Third and Fourth Stage Selection
The 855H Recordable Horn uses negative switching to change
the tone to the second, third and fourth stages.
Connect correct DC input voltage to "+" and "-" as appropriate.
To activate the second, third or fourth stage tone, connect the
‘-’ supply line to the relevant stage terminal while maintaining
the DC supply to ‘+’ and ‘-’.
•
•
•
For Stage 2 connect ‘-’ to the S2 terminal
For Stage 3 connect ‘-’ to the S3 terminal
For Stage 4 connect ‘-’ to the S4 terminal
The negative supply must remain
connected to the
‘-’ terminal and a
connection made from this to the
appropriate stage terminal, otherwise
the unit will be damaged.
WARNING
DC CIRCUIT
WIRING
DIAGRAM
CUSTOMER
SUPPLIED
SWITCHES
See PCB layout on page
5 for actual terminal block
positions
BEACON
PRE-WIRED
INTERNALLY
TERMINALS ON
MAIN PCB
Beacon
Sounder
S4S3S2
S4
S3
S2
+
-
+
-
3
AC Units Second, Third and Fourth Stage Selection
Connect correct AC input voltage to "L" and "N" as appropriate
AC Units Stage 1 operation:
The 855H Recordable Horn uses Line switching to change the
tone to the second, third and fourth stages.
To activate the second, third or fourth stage tone, connect the
‘L’ supply line to the relevent stage terminal while maintaining
the AC supply to ‘L’ and ‘N’.
•
•
•
For Stage 2 connect ‘L’ to the S2 terminal
For Stage 3 connect ‘L’ to the S3 terminal
For Stage 4 connect ‘L’ to the S4 terminal
AC CIRCUIT
WIRING
DIAGRAM
CUSTOMER
SUPPLIED
SWITCHES
BEACON
PRE-WIRED
INTERNALLY
TERMINALS ON
SUB PCB
Sounder
S4 S3 S2
S4
S3
S2
N
L
N
L
Beacon
