Behavior In Degraded Mode; Interface To Service Devices - Siemens FDOOTC241 Technical Manual

Neural fire detector

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Table of Contents

Structure and function

Function

3.3.11 Behavior in degraded mode

38 | 94

Building Technologies

Fire Safety

Applicable for the FDnet:

When the main processor of the fire control panel fails, the control panel works in

degraded mode operation. Depending on the control panel type, the fire control

panel can continue to perform the most important alarming and signaling functions

in degraded mode operation.

Degraded mode operation behavior on control panels that support

degraded mode operation:

Alarming is still ensured in degraded mode operation. However, in degraded

mode only collective alarming is possible. This means that in the event of an

alarm, it is possible to identify the detector line but not the exact location of the

detector triggering the alarm.

If a sounder base is connected to the output for the external alarm indicator, it

is activated in degraded mode operation if there is a fire alarm (only with

detectors and sounder bases with ES 30). Configuration for a specific control

panel is possible.

When the connection for the external alarm indicator is used for a control

function (e.g. hold-open system), the output assumes the configured fail-safe

position; configuration for a specific control panel is possible.

In degraded mode operation, the FDOOTC241 only supports the 'Fire' alarm

class. If the 'CO' alarm class is also to be supported in degraded mode operation,

technical customer support must be informed.

Degraded mode operation on the FDnet is not supported in the same way by all

control panels. The information in the 'List of compatibility' and in the corresponding

control panel documentation must be taken into account during project planning.

A proximity interface (MC link) is available for commissioning and maintenance in

order to communicate with the detector exchanger and tester FDUD292 and the

intelligent detector tester FDUD293.

You will find more information in documents 007227 and 009718.