22
en | Installation wiring
PRAESENSA
2021.12.21 | V0.15b | F.01U.402.882
Underwriters Laboratories Listing Document (ULLD)
Bosch Security Systems B.V.
200
656
0.5
0.5
0.5
0.75
1
1.5
1.5
2.5
4
150
492
0.5
0.5
0.5
0.5
0.75
1
1.5
1.5
2.5
100
328
0.5
0.5
0.5
0.5
0.5
0.75
0.75
1
1.5
50
164
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.75
[W]
@100 V
20
50
100
200
300
400
500
600
-
[W]
@70 V
10
25
50
100
150
200
250
300
400
Loudspeaker power at end‑of‑line
Ethernet copper cable
–
All PRAESENSA devices are designed to be used with Gigabit transmission (1000BASE‑T),
so be sure to use CAT5e or higher network cables. You can use CAT6 and CAT7 cables as
necessary. According to their specifications, CAT5e or higher cables can transmit data up
to 100 m, but the actual potential transmission distance varies depending on factors such
as the cable and termination quality and the environment in which the cable is used. In
case of doubt use a cable checker to see whether the cable conforms to CAT5e (TIA/
EIA‑568‑B).
Ethernet glass fiber cable
–
Use single mode or multi‑mode glass fiber that fits the SFP transceiver. Take the
maximum cable length and attenuation into account.
Product
Glass fiber
Max. attenuation
Max. length
PRA-SFPLX
Single mode
10.5 dB
10 km
PRA-SFPSX
Multi mode
8.5 dB
550 m
Long range interconnections
Copper CAT‑wiring for Ethernet is limited to a distance of 100 m between nodes. Longer
distances can be covered by using Gigabit fiber interconnections with SFP transceivers. Some
PRAESENSA devices have one or more SFP sockets for this purpose. But call stations need
Power over Ethernet (PoE), which cannot be transported on fiber connections. For distances
above 100 m there is the following alternative:
–
It is possible to use special Ethernet cables that deliver 1 Gbps and PoE+ up to 196 m.
See Gamechanger cables (
