Structure And Function; Overview - Siemens FDM223 Technical Manual

3.1 Overview

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3 Structure and function

The manual call points are intended for use in places where a fire can be detected
by people who can manually trigger an alarm.
The manual call points consist of a housing and a switching unit. They have the
following features:
● Manual call points FDM223 and FDM223H with indirect activation [➙ 16]
● Manual call points FDM224 and FDM224H with direct activation [➙ 17]
● Two-wire installation for all cable types
● Individual detector addressing
● Indication of the condition (Alarm, localization or test) by means of a
dichromatic LED
● Integrated line separation function
● Communication via FDnet/C-NET
● Manual call points FDM223H and FDM224H:
– Very robust housing design made from fiberglass-reinforced thermoplast
– For surface mounting in humid, wet and dusty environments
● Housing FDMH297-R:
– Housing optimized for the migration of old manual call points in wall
hydrants, for example. Height and width of housing same as old
SIGMASYS manual call points.
– Not suitable for use in wet areas.
Manual call points in housing FDMH293-x or FDMH297-R
Manual call point FDM223
Manual call point in housing FDMH292-R
Manual call point FDM223H
See also
2
2
Manual call point FDM224
Manual call point FDM224H
Manual call points FDM223H and FDM224H [➙ 16]
Manual call points FDM223H and FDM224H [➙ 17]
Structure and function
Overview
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