Praesideo 3.5 Installation and User Instructions 4 Amplifiers

en 196

12.6Technical data loudspeaker supervision board

12.6.1 Physical characteristics

Dimensions (H x W x D):

78 x 60 x 22 mm

Weight:

70g Connection:

Screwable connector

12.6.2 Climate conditions

Temperature:

-5 to 55 °C (operating, guaranteed)

-15 to 55 °C (operating, sample tested) -20 to 70 °C (non-operating)

Relative humidity:

15 to 90%, non-condensing (operating)

5to 95%, non-condensing (non-operating) Air pressure:

600 to 1100 hPa

12.6.3 EMC and Safety

Electromagnetic compatibility:

EN55103-1/FCC-47 part 15B

EN55103-2

EN50121-4

EN50130-4

Electrical safety:

IEC60065 (CB-scheme)

EN60065

Approvals:

CE marking

EN60849, EN54-16 and ISO7240-16

IEC60945

12.6.4 Mean time between failure

MTBF:

50,000 hours at +55 °C

(The MTBF doubles for every 10 °C decrease in temperature.)

12.6.5 Loudspeaker line characteristics

Preferred cable:

Single twisted pair, 0.75 mm2 to 1.5 mm2. The use of multiwire cables is not recommended. Cross talk of communication signals affects the supervision performance.

Maximum cable length:

1 km (max. 300 m adjacent to other supervised loudspeaker cables)

Maximum cable loop resistance:

38 ohm

Maximum cable inductance:

750μH

Minimum total loudspeaker impedance:

50 ohm @ 70 kHz (independent of amplifier power) Maximum cable capacity:

300 nF. However, if the maximum load capacity for the power amplifier output is less than this value, the maximum load capacity of the power amplifier is leading (see section 8.8).

Maximum number of supervision boards (LBB4441/00 and LBB4443/00) per amplifier channel:

80 for a 500 W amplifier channel

40 for a 250 W amplifier channel

20 for a 125 W amplifier channel

10 for a 60 W amplifier channel (PRS-8B060 only) Loudspeaker voltage:

70 V, 100 V

Note

The load of the loudspeakers in relation to the line impedance should be such that the 20 kHz pilot tone level is not less than 9 Vrms at the position of the supervision boards.

Bosch Security Systems 2011-02

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Bosch Appliances 3.5 manual Technical data loudspeaker supervision board, Loudspeaker line characteristics
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