40(57)
Datum/Date
Rev
Dokumentnr/Documentnr
Uppgjord/Prepared
Dokansv/Godkänd - Doc respons/Approved
Kontr/Checked
Tillhör/Referens-File/Reference
1999-07-15
V
1531-BDV 113 08 Uen
INSTALLATION INSTRUCTION
Faktaansvarig - Subject responsible
6.7.2
Base Stations Cabling
Using a four-pair cable or more-pair cable, the free cable pairs can be used as additional power wires (EPP) to increase
the feeding distance and reduce overall power consumption (by reducing the ohmic resistance) to the BS. The BSs
can also be powered by an on-site adapter (refer to
section 6.7.7
).
Connection of serial communication wires and EPP lines is polarity-independent. SC0-0 and SC0-1 may be
interchanged but SC0-x and SC1-x may not be interchanged. The diagram below shows the wiring principle to each
base station connected to the IC-CU2 or IC-LU.
Power feeding of the Base Station
There are three alternatives to power feed (-48V) the Base Station:
•
The power feeding can be taken via the IC-CU2 or IC-LU from the back plane in the cabinet. The
DIP-switch on the IC-LU is set to OFF.
•
From an external power source via the front connector on the IC-CU2 or IC-LU (
≤
56V). Note the
polarity on the input (see drawing of IC-CU2 or IC-LU board). The switch on the IC-CU2 or IC-LU
is set to ON.
•
By an AC-adapter (see
page 45
). The switch on the IC-CU2 and IC-LU should be set to ON but
no power feeding from the external power source via the front connector on the IC-LU.
intermediate
floor
e.g. 40m
Ground floor
Base
Station 1
16m
3,5m
corridor
48V external
source
(optional)
-48V from
backplane
CLC x
+
T
+
T
up to 2 power pairs "EPP
V0
-
V1
+
carrying V0
-
and V1
+
+
-
DC
DC
SC0-b
SC1-b
SC0-a
SC1-a
EPPb
EPPa
SC0-b
SC1-b
SC0-a
SC1-a
EPPb
EPPa
Data/power
connector 1
Data/power
connector 2
Base Station KRC NB 201 03/_
and KRC NB 301 01/_
available only on
Base Station
KRC NB 301 01/_
IC-LU or IC-CU2
(one of 4
or 8)
SC0-b
SC0-a
SC1-b
SC1-a
EPPb
EPPa
S1 & 2