Simple siren control by hardwire parallel inputs & control out puts.
The siren control communication network can be implemented using any one of the following systems or with a
combination of two of these systems.
Land Mobile Narrow Band FM Radio. Operating frequencies VHF 136 - 174 MHz or UHF 403-470 MHz. Data and voice.
TETRA. Data and voice.
APCO - 25 (For use in the USA)
2.4 & 5.8 GHz spread spectrum frequency hopping microwave radio data and voice.
Single or bidirectional COFDM radio. Data and voice.
Direct satellite - bidirectional data and voice.
GSM and GPRS. Data. Voice subject to local service provider.
Serial data and voice over 600 ohm lines (POT).
RS-485 data.
Fibre optic networks. Data and voice.
TCP/IP. Data and VoIP.
Serial data from SCADA terminal with standard DCS protocols.
Parallel dry contact from SCADA or dedicated cables.
Control Methods
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