Siemens FC924 User Manual

FS20 Marine Fire Detection Control Panel
91
Siemens Industry, Inc. A6V10519176_enUS_b
Building Technologies Division
16.5 Technical Data
Supply input
Voltage 3.3 VDC
Operating current:
 Standby Approx. 75 mA
 Alarm Approx. 136 mA
RS-485 circuit
Number of participants Max. 8
Maximum length per class A circuit, twisted 3940 ft at 100 kbit/s
Maximum length per class B circuit 3940 ft
Maximum loop resistance 80 Ω
Maximum line-to-line capacitance 2.5 µF
Data rate: Automatically regulated by processor
 <330 ft 12 Mbit/s
 >330…660 ft 1.5 Mbit/s
 >660…1310 ft 500 kbit/s
 >1310…3940 ft 93.75…9.6 kbit/s
Electrical isolation between the RS-485
interface and the panel
1.5 kV
Monitored for  Ground fault (at >1 kΩ to ground)
 Interruption
 Short circuit
Wire gauge 12…26 AWG

Siemens FC924 Specifications

General

Brand	Siemens
Model	FC924
Category	Control Panel
Language	English