Line Separator; Automatic Recognition Of The Detector Line Protocol; Internal Alarm Indicator; Connection For External Alarm Indicators - Siemens FDOOT221 Technical Manual

3 Structure and function
Function
3.4.4
3.4.5
3.4.6
3.4.7
36
Building Technologies
Fire Safety

Line separator

All FDnet devices are equipped with a line separator.
The FDnet device is equipped with electronic switches which isolate the defective
part in case of a short-circuit on the detector line. The rest of the detector line
remains serviceable.
On a loop line all FDnet devices remain fully functional after a simple error.

Automatic recognition of the detector line protocol

The multiple protocol detectors FDOOT241-x/-Ax may communicate via different
detector line protocols. These detectors recognize the protocol on the detector line
(e.g. FDnet or collective) and automatically switch to the protocol in question. This
functionality facilitates commissioning in case of modernization, as no actions need
to be taken on the detector itself. For exceptions, see 'List of compatibility'.
You will find further information about migration and modernization in document
A6V10323158.
See also
Applicable documents [

Internal alarm indicator

The point detectors have an internal alarm indicator. The internal alarm indicator
shows the operating condition of the point detector according to the table below.
Operating condition Flashing mode of the AI
Normal AI flashes weakly every 4 seconds
Test AI flashes weakly every 0.5 seconds
Alarm AI lights up every second

Connection for external alarm indicators

Two external alarm indicators can be connected to each point detector.
On the FDnet, it is possible to connect external alarm indicator to any point
detector. The trigger for activating the alarm indicator can be programmed at the
control panel.
Instead of an optical alarm indicator that flashes in the event of an alarm, the
sounder base is provided with an acoustic alarm indicator.
See also
Connection diagram for FDnet detector line [
Connection diagram for collective detector line [
Connection diagram for MS8 detector line [
Connection diagram for AnalogPLUS detector line [
Connection diagram for SIGMALOOP detector line [
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01.07.2012