4EVAC Loopdrive 4E-LDB, Руководство пользователя и инструкция по установке, Страница: 4 / 25

Loopdrive – User and installation manual
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1.1. Loopdrive components
Loopdrive system comprises of two types of devices which play different roles in the system:
LDB (LoopDrive Booster) – is the central unit installed in the Voice Alarm System rack,
directly between the amplifier and loudspeaker line. Mounted on a DIN rail LDB works
as the DC power supply for FIMs and can also generate special service commands to FIMs.
LDB is responsible for monitoring and reporting faults globally (per loudspeaker loop):
- Loop short (entire loop)
- Loop open (entire loop)
- T-branch short (any T-branch)
- T-branch open (any T-branch)
- Earth leakage (amplifier input, entire loop, any T-branch)
- Amplifier input open
FRONT TOP BOTTOM SIDE
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1. MODE/EARTH indicator
2. OPEN indicator
3. SHORT indicator
4. SERVICE button
5. RESET button
6. ID rotary switch
7. LOOP PRIMARY output connector
8. LOOP SECONDARY output connector
9. Power amplifier connector
10. Loopdrive bus DIN rail connector
FAULT OUTPUT CONTACT
RS485 B
RS485 A
GND
+24V/48VDC DC