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9.4.2
Alarm Devices (sounders, etc.)
Regarding addressable alarm devices, see page 62.
The alarm devices used in FT1020G3 can be one or two of the following equipment:
1. Occupant Warning System (OWS) with different power output built in FT1020G3
and provides a supervised 100V speaker circuits and 24V
2. 24V
3. Full EWIS system interfaced to FT1020G3.
Connections of alarm devices according to drawings F732-02 and F737.
9.4.3
Magnetic Door Holders
Different magnetic door holders to suit the applications are required. A separate 24V non-
battery backed power supply is recommended. Door holders must be provided with a
"suppression diode" (e.g. 1N4004) in parallel with the coil, similar to the alarm devices, see
drawing F732-02. Typical example is shown in Figure 26.
9.4.4
Duct Detector Chambers
6377
Duct Detector Chamber UG-4. The housing is made of grey ABS and the venturi
pipe is made of aluminium. It is supplied with four IP65 glands for cable entry.
6377 can be used in conventional as well as Analogue fire alarm systems,
depending on the base and detector mounted inside the housing (base 2324 +
4452 or base 3312 + 4401). The venturi pipe is available with or without a built-in
fan and in three lengths (0.6, 1.5 & 2.8 m). The pipe can easily be shortened to
suit the ventilation duct. Mounting bracket and filters are also available. For more
information see Duct Detector Chamber Datasheet.
strobes or alarm bells connected to S0 – S3.
DC
Figure 26 Connection example of 2A MDH power supply
Technical/Programming Manual
71
FT1020G3 Rev 2.2.1
dual strobe output.
DC
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