Operating instructions

Doc.No.: 99100-003-CA
Page 2 of 4
GENERAL FACILITIES:
The DOUBLE ALARM GENERATOR WITH SURVEILLANCE – 99100-003 is an alarm generator
module comprising 2 totally independent generator sections.
The digital in- and outputs as well as the primary audio output are however common to both
generators.
Even so they are isolated in such way they will not interfere with normal operation in case of any
single accident/failure.
The generator is fully microprocessor controlled and thus very flexible.
It can be pre-programmed to most requirements.
In many applications it can also be user-configured to meet the required performance.
In addition to be full duplication of the generator it is equipped with various supervision facilities:
• Input power supply-supervision guard below 15-18 V. (Software processed).
• Supervision of the opposite generator operation voltage, above 4.6 V. (Software processed).
• Supervision of the signal output voltage, above 325 mV. Software processed).
• Supervision of the generators own operation voltage, above 4.5 V. This circuit will also protect the
circuit from unintentional stops caused by power supply glitches. (Hardware processed).
• A watchdog circuit is monitoring the microprocessor and software performance in order to avoid
any lockups. (Hardware processed – software trigged).
Level adjustment:
The signal output voltage is a common passive summarisation output for both signal generators. Both
generator modules have separate level adjustment ranging between 0-1.5 V RMS. In order to avoid
fault conditions caused by the output signal supervision circuit, the level must always be adjusted
above 350mV.
JUMPER:
The jumper ST1/2 selects external I/O pull-up voltage between 24V and 5V. The normal setting for
Phontech equipment is ST1 – 24V. In special applications ST2 – 5V pull-up voltage is necessary. The
setting is dependent of the external logic level.
Handbook page
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