CP – Sounder Card Expansion Capability
The Sigma CP is an approved and BSI certified
conventional control panel, available with
2, 4 or 8 conventional detection zones and
two conventional sounder outputs.
The “T series” Sigma CP panels
also allow sounders to be fitted to the detection
zones, in addition to the two standard sounder
circuits. However the “T series”
control panels require special detector base
circuits to allow the detection devices to
operate on the same two wires as the zone
In some installations, it is desirable to
provide additional dedicated sounder circuits,
in particular in retrofit applications and
in installations where zonal or two-stage
ringing patterns are required.
For intrinsically safe installations, there
is a limit in the number of IS sounders that
can be installed in the protected area, due
to the isolating barrier current. Typically
only one or two Intrinsically Safe sounders
can be powered from each circuit, therefore
additional circuits are often required to
ensure sufficient audibility in the IS area.
The Sigma CP sounder board, Kentec part number
S461, will satisfy these additional sounder
The Sigma CP sounder board provides eight
individually monitored sounder circuits, each
rated at 500mA and protected by an electronic
fuse. These 8 sounders may be configured to
operate in the following patterns:
Each sounder output on the S580 board has an
“activated” indicator to allow easy
identification of energised sounder outputs.
- Common - all sounders
outputs operate from a fire in any zone.
- Zonal - only the sounder
output allocated to the zone in fire will
- Two-stage - the sounder
allocated to the zone in fire operates continually,
all other sounder outputs pulse.
A local “class change” input
is also provided, which will operate all 8
sounder outputs for the duration that the
input is active.
The sounder board is connected to the Sigma
CP using RS485 data, and therefore can be
installed up to 1200m from the control panel,
using suitable RS485 compatible data cable.
Up to 7 sounder cards can be connected to
each Sigma CP panel, providing additional
sounder expansion capacity in different locations.
As the sounder card can potentially draw
up to 4 Amps from the 8 sounder circuits,
power consumption must be considered. In most
instances the combined sounder load and board
current consumption exceed the Sigma CP 500mA
auxiliary power supply output.
Kentec can supply the Sounder card in a Sigma
CP style enclosure and with a power supply,
for installations where the unit cannot be
directly powered from the Sigma CP panel.
Kentec part number K04000 M2 - Boxed Sigma
CP Sounder Card, no power supply
Kentec part number K044000 M2 - Boxed Sigma
CP Sounder Card PCB c/w 4A power supply
Note: The Sigma CP panel must be
fitted with firmware version 2.42 or later
to support this product. This is
identified by the software label on the rear
of the Sigma CP board, which should show “SIGMA242.HEX”
For more information
on the S461 sounder card:
For the latest
Sigma CP manual: