PRAESENSA
Installation wiring | en
73
Bosch Security Systems B.V.
Underwriters Laboratories Listing Document (ULLD)
2021.12.21 | V0.15b | F.01U.402.882
3.7.7
Lifeline
The lifeline is required for UL2572 to meet the backup time requirements and is a cable
connection between a PRAESENSA amplifier and a PRAESENSA multifunction power supply.
This interconnection serves multiple functions:
–
Lifeline audio routing (backup audio signal for the connected amplifier in case its netwerk
interface or both network links would fail).
–
Not required for UL2572. This backup audio signal is optional and allowed to be used
in a UL2572 compliant system.
–
Lower power consumption during mains absent.
–
Required for UL2572 compliancy.
C
(AD60x)
1
2
3
123456
To complete the lifeline interconnection follow the procedure below:
1.
The 6‑pole cable and connector for the amplifier are delivered with the amplifier. For
lifeline assembly instructions, refer to the following amplifier sections:
and/or
2.
The 6‑pole connector (C) for the multifunction power supply is delivered with the power
supply.
3.
Mount the connector (C) to the cable, following the same wire order as for the amplifier
side, the cable should be reversible.
4.
Insert the connector (C) into the lifeline socket of the multifunction power supply, using
the socket next to the 48 V outputs that go to the same amplifier.
i
Notice!
Each pair of 48 V outputs A/B and the lifeline next to it belong to each other and are always
connected to the same amplifier. Keep the cables together to avoid errors that could result in
no sound in case of emergencies.
