Obsolete. Not produced to day.
Jo Tech Service alarm generator ( alarmgenerator ) for ship's .
When carrying passengers also consider an "Addressed Pre recorded Emergency Voice Alarms System" replacing or in addition to tones from an alarm generator with different tone patterns.
Note! When the microphone on the bridge is used, it must interrupt any alarm signal.
This construction is composed quite simple, using standard C-Mos circuits .
High electrical noice immunity, the electrical noice from the generator itself is very low .
Power supply : 24VDC
The Generator is built on a "Europa" format universal PCB ( 100mm x 160mm ).
Connectors : Screw terminals.
Size: Euro format . 100mm x 160mm
1. priority: Abadon ship ( Continous signal )
2. priority: General alarm , w/ easy to read seq . ( 7 short + 1 long signal ) w/repeat . seq. = spspspspspspspssssspppp
3. priority: Fire alarm & Abadon ship ( short signal ) w/repeat . seq. = sp
seq. s = 2 sec. 500hz signal , p = 2 sec. pause .
500hz signal , 600 Ohm adjustable 0 - 1,5V RMS balanced audio output , hard / soft tone ,
8A relay output syncronized to the audio signal sequence ,
1A command / priority relay output .
The command / priority relay is activated when any input is active .
How to connect ( info page )
Schematic ver. 2.1 ( info page )
Shematic ver. 2.2 ( info page )
Alarmboard used on PA ( Public Adressed ) speaker system:
On the PA system: Connect audio output to aux / line input ( 775mVRMS ) . connect command / priority relay output to PA priority circuits.
Routing : All Call ( passengers & crew )
Microphone on the bridge must have priority above all alarms.
Alarmboard used on Stentofon MPC / Vingtor VMP intercom system :
an interface has to be used , and some programming has to be performed on the intercom exchange. ( addressing / priority / remote functions )
Station on the bridge must have priority above all alarms.
The Norwegian costal express-ship "MS Narvik" is now using our alarm generator .
URL & E-mail
www.jotech.no mail > firstname.lastname@example.org
http://home.c2i.net/jo_tech/ mail > email@example.com
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The boards was made in standard Europa format , 100mm x 160mm