User's Manual

Ericsson Internal
DESCRIPTION 30 ( 46 )
/ XSNSIXI 198/1551-LZA 701 0001 Uen
CBC/XRX/M (Kai Lian) 2011-05-05 C
Prepared (also subject responsible if other) No.
Approved Checked Date Rev Reference
8.2 –48 V DC Power Interface
The interface accepts a cable area of 2 x 6 mm². The cable gland for the MU
with TG synchronization accepts a cable diameter of 6 – 12 mm.
It is recommended to use a cable area of 2 x 6 mm² for power cable lengths up
to 60 m. The maximum voltage drop of the cable should be less than 5 V DC. A
shielded power cable connected to the MU must be used, which is connected
to the ground on both the MU and the power supply equipment side, otherwise
the overvoltage and lightning protection function of the MU will fail.
The figures below show the power interface.
C
T
Y
P
E
3
R
E
N
C
L
O
I
S
U
R
E
I
P
5
5
0
1
6
8
E
T
L
L
I
S
T
E
D
C
O
N
F
O
R
M
5
T
O
A
N
S
I
/
U
L
6
0
9
5
0
-
1
C
E
R
T
I
F
I
E
D
T
O
C
A
N
/
C
S
A
C
2
2
2
N
O
6
0
9
5
0
-
1
Figure 18 DC Power Interface
8.3 Transmission Interface
RBS 2111 Second Generation supports three transmission standards: