SANJIANG SEC1000, Инструкция по установке и наладке

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SEC1000 FIRE ALARM CONTROL PANEL
Page
7
of 24
Note
: Do NOT connect batteries before applying mains power first.
3.6 Points connection to the loop
The loop supports class A and Class B types. The figure in next page shows a typical Class A
loop connection complete with detectors, sounder strobes, modules and loop isolators. Both
ends of the loop are connected respectively to the Loop In and Loop Out terminal block on
the MB-Board. It should be noted, when the loop is in class B connection, the terminal LOOP
INPUT on MB-Board is not available.
Means to limit the consequences of short fault on the loop is offered by containing loop
isolators. At this point, a single short circuit fault will only disable devices in the section of
wiring between isolators rather than disrupt the whole loop. Within 70s following the
occurrence of short fault, the isolator will work. It is recommended to install the isolators at
intervals not exceeding 32 addressable devices.