LP21/LP22
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25
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37
LP21/LP22 Installation instructions en
Sensors
9.2
Setting loop frequency (frequency step)
The operating frequency setting serves to prevent couplings.
Interference between loops
Couplings may occur between adjacent loops or loop connections from other detectors. Therefore, loops
less than 2 metres apart should not operate at the same loop frequency. In this case a frequency spacing of
at least 5 kHz must be maintained.
Loop frequency indicator
The operating frequency of the loops after switching on or changes is reflected with an LED flash sequence.
Multiplexing
No coupling between the loops of a detector takes place through multiplexing (2 channel version). The loops
on a detector may therefore operate on the same frequency.
NOTE
Loop inductivity range
In the event of loop inductivity outside the recommended range, the available frequency range may be
restricted.
DIP (frequency) Frequency step
OFF
low (factory setting)
ON
High
Tab.15: Loop frequency settings
