PRAESENSA
Installation wiring | en
37
Bosch Security Systems B.V.
Underwriters Laboratories Listing Document (ULLD)
2021.12.21 | V0.15b | F.01U.402.882
!
Caution!
The chassis ground screw of an amplifier must be connected to protective ground
before
the
amplifier is connected to a power supply.
3.4.5
Power supply
The amplifier must be powered from a 48 V PRAESENSA multifunction power supply (MPSx).
It is recommended to use double connections for fail-safe redundancy.
(MPSx)
Follow the connection procedure below:
1.
Crimp ferrules H onto the ends of the electrical wires of cable F to provide a solid and
reliable electrical connection.
–
Use a dedicated crimping tool.
2.
Insert each wire into the appropriate slot of the connector B, observing polarity. Wiring
color convention: red for + and black for -.
–
Use a flat blade screwdriver to tighten each connection.
3.
Insert the cable into the 48 V input A, cut the cable to length and mount the connector of
the powering device to the other end of the cable, again observing polarity. Insert this
connector into output A of the powering device.
4.
For redundancy, repeat these steps for a second cable between output B of the powering
device to input B of the amplifier
–
When no power supply redundancy is required, a single power supply can be used; in
that case connect the 48 V inputs A and B in parallel to make use of the amplifier's
internal dual power converters for fail safe redundancy and to avoid a supply
supervision fault event. .
