Ampac FireFinder PLUS, Установка, пусконаладка и эксплуатация

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Page 23
4.14.1 Detector loop Isolator Installation
In applications where it is not necessary to use an isolating base for each detector, up to 20 detectors
may be installed between isolating bases.

Note: Refer to Apollo Isolating specifications and guidelines for further details.
If a short circuit or abnormally low impedance occurs, the base isolates the negative supply in the
direction of the fault. When the short circuit is removed the power will automatically be restored.

Note: Isolating base is polarity sensitive.
4.14.2 Loop Isolator calculator
The number of isolating devices on the loop can limit the maximum loop cable length depending on
the type of cable used and the total loop current. Refer to the tables below for reference.
Maximum Cable Length Using 1.5mm². Cable
Number of Isolators 0 5 10 15 20 25 30 35 40 45 50
Loop Current Total (mA )
MAX CABLE LENGTH USING 1.5mm ² .
50 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000
100 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000
150 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000
200 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 960
250 1000 1000 1000 1000 973 933 893 853 813 733 733
300 971 931 891 851 811 771 731 691 651 611 571
350 850 810 770 730 690 650 610 570 530 490 450
400 756 716 676 636 596 556 516 476 436 396 356
450 680 640 600 560 520 480 440 400 360 320 280
500 618 578 538 498 458 418 378 338 298 258 218
Maximum Cable Length Using 2.5mm². Cable
Number of Isolators 0 5 10 15 20 25 30 35 40 45 50
Loop Current Total (mA )
MAX CABLE LENGTH USING 2.5mm ² .
50 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000
100 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000
150 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000
200 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000
250 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000
300 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 952
350 1000 1000 1000 1000 1000 1000 1000 950 883 817 750
400 1000 1000 1000 1000 993 926 859 793 726 659 593
450 1000 1000 1000 933 867 800 733 667 600 53 467
500 1000 964 897 930 764 697 630 564 497 430 364
4.14.3 Loop Open / Short Circuit.
In the case of an Open Circuit or Short circuit (short circuit isolators used) on the Loop Line the Loop
board provides the ability to drive out from both sides of the loop (In and Out). When these Faults are
repaired / cleared the panel will still report a Loop Fault until a Loop Test is performed on the
appropriate loop.