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3.3.12 Line tester
The line tester FDUL221 is able to recognize and localize the following errors on
the C-NET:
● Wiring error
● Open line
● Short-circuit
● Ground fault
In addition, the line tester recognizes the devices connected to the C-NET detector
line.
You will find more information in document 008250.
The line tester FDUL221 cannot be used on collective detector lines.
See also
2 Applicable documents [➙ 9]
3.4 Mechanical setup
One of the following devices is required to install a point detector:
● Detector base DB72x or detector base (collective) DB110
● Sounder base DBS720
After installing the detector base or sounder base, simply insert the point detector
in the base and turn it, either manually or using the detector exchanger DX791 and
the adapter for detector exchanger FDUD491, until you hear and feel it snap in.
Properties
● Quick installation and secure contact
● The centered alarm indicator makes an alignment of the detector base
superfluous
● Space for up to 4 auxiliary terminals
Accessories are available for a variety of different applications and can be
combined to suit the particular application in question.
See also
2 Detector base with loop contact DB721 [➙ 45]
2 Detector base DB721D [➙ 46]
2 Detector base (collective) DB110 [➙ 46]
2 Sounder base DBS720 [➙ 47]
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