Limitations; Guidelines For Failure Of The Display Unit And Signal Processor; Overvoltage Protection Measures; Table 1: Guidelines For Failure Of The Display Unit And Signal Processor - Siemens SIGMASYS C Manual

3 Guidelines for project planning
The following must be observed when constructing fire alarm systems in compliance with the
guidelines EN45, VdS 2095 (Association of German Underwriters) and DIN VDE 0833,
Part 2:
Monitored alarm line as loop (ring cable)
Up to 128 detectors and devices (automatic detectors, non-automatic detectors [manual call
points], transponders, indicator panel control facilities) can be connected here and multiple
fire sections with a total surveillance area of up to 6000 m
Monitored alarm line as a spur
Multiple detector zones with up to 32 automatic or 10 non-automatic fire detectors can be
connected in a fire section.
3.1

Limitations

Detector zone limitations are:
A surveillance area of up to 1600 m
A detector zone must not exceed a fire section.
In the event of a monitored line fault
A maximum of 32 automatic or 10 non-automatic detectors may fail on a loop or spur in a de-
tector zone.
Only control facilities associated with the relevant detector zone may fail.
3.2

Guidelines for failure of the display unit and signal processor

Failure of
Display unit (operating panel)
Signal processor (SOC or MPC)
Network e.g. 4 control and indicat-
ing panels with <12.000 m
2
<48.000 m Redundancy not re-
quired. Redundancy required for
systems with a surveillance area
2
>48.000 m .

Table 1: Guidelines for failure of the display unit and signal processor

3.3

Overvoltage protection measures

SIGMASYS control and indicating panels come with fine protection.
If required, medium and coarse protection for the O/E areas must be integrated in the line
network (in accordance with the VdS 2095/VdS2833 guidelines and the standard collection
SIG 01-01, GMS 03-01 A24205-A334-A790).
8 / 128
2
Effects in the case of < 512 de-
tectors <12.000 m
By displaying a general indication.
Integrated in the operating panel in
SIGMASYS G.
Control and indicating panel may
fail.
No fault in the event of failure of a
2
each = routing path.
2 can be monitored.
Effects in the case of >512 de-
tectors >12.000 m
2
Additional operating panel or zone
operating panel or indicator panel
or printer.
No effect on the remaining signal
processing operations.
Information to superordinate con-
trol and indicating panel must be
guaranteed (fault signal from rele-
vant control and indicating panel
and alarm signal).
BMT Project Planning Guidelines
Best.Nr. A24205-A337-B970 – Edition 12 (03/07)
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