Bosch PM1-LISD, Инструкция по установке и эксплуатации

Страница: 27 / 60

Combining installation options
The three installation options can be combined as shown in the following figure:
1 2
3
4 4
6 6
6 6
6 6
4
5
5
3
5
7
8
Figure 4.4: Combining installation options
No. Item Combined Installation
1 Zone output of public
address/voice alarm system – 100 V constant voltage line (50 Hz – 20 kHz), 500 W
power handling capacity.
2 Master Unit – See Connections indicators and controls, page 31.
– See DIP switch settings, page 41.
3 Loudspeaker loop – See Connections indicators and controls, page 31.
4 Isolator Board – Isolator Board configured for installation option 1, 2
or 3.
– Set the jumper settings on the Isolator Boards, as
required.
5 Loudspeaker – Each loudspeaker connected to tap-off connection of
an Isolator Board or DC Blocking Board.
6 DC Blocking Board – DC Blocking Boards connected to loudspeakers, as
required.
7 Tap-off for loudspeakers – According to some standards, a maximum of 25
loudspeakers can be connected to an Isolator Board
tap-off or in a segment.
8 End-of-line resistor – 47 kohm, > 0.5 watt resistor connected across the
unused loop terminal of the last DC Blocking Board
in the branch.
– Open-circuit detection is typically used when
multiple loudspeaker are connected to the tap-off or
when one of the loudspeaker is connected to the
Isolator Board at a distance.
– Whether or not a branch should be monitored for
open circuits depends on local standards.
See also
–
Configuration, page 41
4.3.4
Loudspeakers Line Isolator System Planning | en 27
Bosch Security Systems B.V. Installation and Operation Manual 2014.03 | V1.1 |