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Connection of detectors Labor Strauss
Chapter 3 • ADM technology
93
3.2
Cable requirements
The line resistance of the detection loop must not exceed 50 Ohm per wire. This corresponds to a loop
length of approx. 1400m, using a 0.5mm² wire.
The capacitance of the whole loop line must not exceed 400nF.
Loop lines of several loop interfaces
must not
share a common cable.
Shielded cables are not neces-
sary and therefore not recommended
.
3.2.1
Unshielded cable
For the wiring an unshielded cable is recommended. The drawing below shows you how to connect the
cable to the detectors and to the control panel.
Connection-LST.odt / 2009 / AN9161298
200/93
93