3(48)
Date
Rev
Documentnumber
Prepared
Doc respons/Approved
Checked
Reference
1999-07-15
A
1531-BDV BS 101 05 Uen
INSTALLATION INSTRUCTION
Subject responsible
1
GENERAL
Exchange cabinet BDV BS 101 05 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 a switched mode power supply
(SMPS) that is available for two voltage versions. The
standard version is an AC/DC converter. The version
with battery charger offers the same facility but addi-
tionally provides battery back-up or can be powered by
an external DC-source.
The SMPS for 230V is addi-
tionally available with power factor correction (PFC).
Due to the limited load of the cabinet’s power supply
units, the definitive board configuration in a cabinet
must follow the prerequisites in
After installation the PBX shall be made operational in
accordance with the stipulations that apply for system
ASB 150 02. See document
. The cabinet is adapted for boards
fitted with brackets containing screws. Only boards
equipped with these brackets must be installed. These
screws must always be fastened to ensure a proper
ground connection.
Every cabinet’s board position could be used for arbi-
trary furnishing with boards belonging to PBX system
ASB 150 02 but the first position in the first cabinet
must be reserved for the CPU-D_.
It is advisable to protect trunk lines with extra
overvoltage protectors, especially in geographical
areas that are 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, refer to figure: Line protection. The
excess voltage protection can not be installed inside a
BDV BS 101 05 cabinet but should be mounted in an
integrated or external MDF.
Special precautions must be taken to analogue
extension lines that are led 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
is 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
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.
businessphone
Figure: Line protection