Bosch Appliances LBB 1903/10, LBB 1912/10, LBB 1914/10 manual Microphone inputs, Emergency input

Plena Mixer Amplifier Installation and Operating Manual External settings and connections

en 15

4.4 Microphone inputs

						6		6
	Tel/	Emer.		L
		0
				R
0	2			CD				Out
Chime		1-		Aux
			-3	L	ine Out			In
		4					1V
			.5
					M	ic/Line		Inc
		1					Mic/Line
				2
				3
							4	1

Figure 4.4

Dependent on the microphone choose between the XLR with Phantom power and the 6.3 mm phono jack connector. Use an extension cable (1) if necessary. When using input 3 or 4 to connect microphones, set the switches (6) to Mic. When using these inputs as line-inputs, set the switches (6) to Line. To cut-off the lower frequencies of the signal, activate the speechfilters on the PCB (see §2.2).

4.5 Emergency input

				8
	Tel/E	mer.		L
	0
				R
0	2			CD
Ch				A
	ime
	1-		-3
	4
			.5
		1
				2

Figure 4.5

The emergency input is for emergency announcements/signals and obviously has the highest priority (all other inputs are overruled). The emergency volume -which cannot be affected by the master volume control (11) - can be set at 8, using a screwdriver. It can not be set to zero.

Caution

A connection to a telephone network must always be made via a telephone coupler that provides adequate isolation between the telephone network (PBX) and the Plena system. The telephone coupler must also meet all relevant requirements for this type of communication equipment as imposed by law and/or responsible telecommunication organisations in the country of use. Never try to make a direct connection between the telephone network and the mixer amplifier.

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