FS20 Marine Fire Detection Control Panel
Siemens Industry, Inc. A6V10519176_enUS_b
Building Technologies Division
NOTES:
• When shielded cable is utilized, the wiring shields should only be connected at the point origin,
as specified.
• Overhead, exterior wiring is not permitted.
• The standard twist for twisted-pair wires is six (6) turns per foot.
• For wire resistance information, refer to the latest edition of the National Electric Code, NFPA
70, or contact the manufacturer of the wire in question.
23.1 Typical Large FS20 Fire System Configuration
Compliance with Safety of Life at Sea (SOLAS) using USCG Approved Equipment
23.1.1 Power
Although the required two sources of power are available from the main and standby generators,
optional short term battery backup is acceptable.
23.1.2 Audible Alarms
It is specified that bells are pulsed in order to distinguish fire signals from steady bells of the
emergency alarms.
The SOLAS requirement of sounding bells in the crew's spaces if the alarm signals at the control
panel have not received attention within 2 minutes.
23.2 Typical [Small] FS20 Fire System Configuration
Small cruise ships require six zones to cover the accommodation spaces. The low deck height of 7
feet 3 inches increases the possibility of smoke detectors alarming to tobacco smoke. The use of
the alarm verification will tend to eliminate this concern by not reporting, but recording first alarm and
requiring the device to alarm a second time within a time frame adjustable to one minute.
In the event of a true fire, it would be undesirable to have manual station activation so delayed.
Therefore, the manual stations are connected to their own zone not under the influence of alarm
verification.
When designing Fire Control System for various types of vessels, the designer should be
aware of the required vessel type, domestic and SOLAS regulation applicable for that
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