4(46)
Date
Rev
Documentnumber
Prepared
Doc respons/Approved
Checked
Reference
1998-05-29
L
1531-BDV BS 101 01 Uen
INSTALLATION INSTRUCTION
Subject responsible
1
GENERAL
Exchange cabinet BDV BS 101 01 is designed to be
furnished with Printed Board Assemblies (hereafter =
boards or PBAs) belonging to ERICSSON’s PBX-
system ASB 150 02. System functions, desired by the
customer, are realised with appropriate boards and
system programming.
The PBX is powered by an internally mounted power
supply that is available in two versions. The standard
version is an AC/DC converter and the version with
battery charger offers the same facility but additionally
provides battery back-up or can be supplied from an
external DC-source.
The installed PBX shall be made operational in
accordance with the stipulations that apply for system
ASB 150 02. See document
NOTE:
Boards may only be inserted or re-
moved from the cabinet when the power
supply in the cabinet is switched off.
The new cabinet is adapted for boards with brackets
containing screws to provide a ground connection and
should only be equipped with these boards.These
screws must always be fastened to ensure proper op-
eration.
Don’t use older board revision states in the new
cabinet.
In principle, a cabinet’s board position can be used for
arbitrary furnishing with boards belonging to PBX
system ASB 150 02 but the first position is reserved for
the CPU-D_.
Due to the limited load of the cabinet’s power supply
units, the definitive board configuration in a cabinet
must follow the prerequisites in
However, it is advisable to protect trunk lines with extra
overvoltage protectors especially in geographical
areas highly exposed to lightning.
Any lines connected to the PBX that are subjected to
excess voltage (transients) in conjunction with e.g.
lightning discharges must be equipped with excess
voltage protection.
Special considerations must be taken to analogue
extension lines that are placed outdoors. In order to
prevent the analogue extension boards secondary
protection device from blowing in case of lightning.
Each branch on the extension line must have:
1
A protective resistor of 10
Ω
/1W
(REN 195 42/1) connected in series
between cabinet and MDF
2
An overvoltage arrester (gas discharge
tube) for quenching surges to protective
ground should be installed on the network
side of the protective resistor.
1.1
Supplementary documents
•
Document collection EN/LZB 103 1233
•
INSTALLATION INSTRUCTION
(1531-BML BS 101 01)
for the power supply,
equipped with battery charger
1.2
Tools
In addition to customary installation tools, the following
are recommended:
•
Use the appropriate connection tool 769 027/2 to
connect the cables in the internal MDF.
•
Use the appropriate slotting tool LSY 138 252 to
connect the cables to the external
MDF SXK 106 4139/1.
•
Board extractor for PBAs (handle LTD 117 02
and bottom LTD 117 12)
MDF
Protective
ground
Principal circuit drawing.
Overvoltage arresters
(NGC 402 01)
Housed in:
overvoltage protection
cassette (769 027/3)
Protective
resistors 10
Ω
/1W
(REN 195 42/1)
Note: Make sure the MDF is really connected
to protective ground.