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This monitor board is used to monitor the integrity of the speaker circuit. It can monitor the state of the speaker circuit and all its branches together with the LBB 4440/00 monitor control panel. The state of the speaker line is transmitted to LBB 4440/00 through the existing speaker cable. Basic function this monitor board is installed in the housing of the last speaker in the speaker circuit or packaged in a separate housing. It can monitor branch lines. If a speaker circuit has multiple branches, a separate LBB 4443/00 is installed for the last loudspeaker in each branch. This monitor board can detect and report circuit faults within 100 seconds. Interconnection, 2 30 cm soft thread, two faston interface and recognized safety certificate conform to the standard IEC 60065 / EN 60065 immunity in accordance with EN 55103 ? 2 / EN 50130 / EN 50121 ? ? 4 standard cooling conform to EN 55103-1/4 FCC - 47 standard part b 15 emergency in accordance with EN 60849 / EN/ISO 7240 ? ? 16 16 standard 54 nautical comply with IEC 60945 Standard regional certified European CPR EU_CPR CE COC CE CertAlarm CE DOP GL Poland CNBOP install/configure the following speakers to install the monitor board: LC1 -- WM06E LBC 3210/00 LBC 3432/02 LC1 -- UM06E LA1 -- UM20E LA1 -- LS1 -- OC100E -- 1 -- LC1 -- UM12E LA1 -- UM40E -- LBC -- UM24E -- horn speaker LBC 3510/40 LBC 340e/LBC 354016