Module cách ly

Unipolar loop circuit Loop Isolator LI is designed to be used within address communication lines RS-R3 of receiving and control devices R3500 incorporated into fire alarm and fire extinguishing system RU-BEZH. Loop circuit insulator  insulates short-circuited sections of address communication line thus ensuring functioning of the rest part of a communication line. When short circuit condition is reset, loop circuit insulator automatically restores functioning of address communication line.

– The loop circuit Loop Isolator LI is designed for disconnection of a part of dedicated communication line (DCL) in case of a short circuit.

The loop Loop Isolator LI is address device and takes one address in DCL.

To connect to address communication line, two double contact terminal blocks ALS1 and ALS2 are available on the board. ALS1 and ALS2 terminals have equal priority in connection with DCL.

The following is available at the loop circuit insulator board:

–  ALS1 and ALS2 terminals – double contact terminal blocks of equal priority in connection with DCL;

–  state indicator;

–  TEST/tamper button

Protected section of the loop circuit starts near the insulator and ends near the next insulator or the last device within the loop circuit or branch.

Loop circuit insulator state	Indication
Standby	Flashing once per (4-5) seconds
DCL short circuit	Fast flashing (twice a second)
Test	Rapid flashing for (2-3) s when TEST button is pressed
No power supply	Off