Electrical Connection - Siemens FDL241-9 Technical Manual

5.3
Building Technologies
Fire Safety

Electrical connection

The electrical connection depends on the following factors:
Connection to an FDnet/C-NET detector line or collective detector line

Use of unshielded cables or shielded cables

The general process is described below. The connection diagrams and more
information on the various connection variants can be found in the following
chapters.
Note the following with regard to the electrical connection:
CAUTION
Using the device in a damp and/or corrosive environment
Device function is impaired.
● Use the M20 x 1.5 metal cable gland in damp and/or corrosive environments.
Note the positive and negative poles.
Only connect one wire per terminal. This is the only way of ensuring a problem-
free connection over the device's entire service life.
Wherever possible use twisted, unshielded cables. Shielded cables are only

required in special cases, such as strong high-frequency fields. This also
applies to connecting the external alarm indicators.
Only use cables with a wire diameter of 0.2...1.5 mm

General procedure
 The detector base and terminal block are installed.
1. Connect the wires as shown in the corresponding connection diagram. Use a
screwdriver to remove the load from the spring clip so you can slide in the wire.
2. If you are using the detector heating unit, connect the wires of the 24 V supply
according to the connection diagram shown below.
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Connection diagram for the detector heating unit
Mounting / Installation
Electrical connection
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2
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2012-09-07