9(57)
Date
Rev
Documentnumber
Prepared
Doc respons/Approved
Checked
File/Reference
1999-07-15
V
1531-BDV 113 08 Uen
INSTALLATION INSTRUCTION
Subject responsible
4.4
Power Supply
The power supplies listed below are designed to be
powered by sinusoidal mains voltages:
•
A transformer 36 - 38 VAC, 50-60 Hz;
325 VA (RES 147 051/_)
•
A fused external DC source
(42V...56V, 48 V nom.; 5.0 A)
•
A power supply with battery charger
(BML 351 048, 48 V; 5.0 A)
(BML 351 013, 48 V; 5.0 A)
As the power feeding input of the PBX is equipped with
a rectifier bridge, the same input can be used to con-
nect 36 V AC or polarity-independent 48 V DC.
Both transformer and switched mode power supply are
mounted on the rear of the cabinet and the power con-
nection is shown below.
4.4.1
Mains transformer
In a standard installation the PBX is fed by a protective
safety class I transformer with a rated secondary volt-
age of 36 VAC.
Note: The PBX shall have its own mains fuse and
must be connected to an earthed mains outlet
This transformer is available for the following mains
voltages:
•
for 230 V RES 147 051/1
•
for 127 V RES 147 051/3
Mounting of the transformer unit
To mount the transformer unit in the rear of the cabinet
BDV 113 08 insert the unit from the top into the slot at
the rear of the cabinet with the mounting holes facing
to the front. Align with the 4 cabinet holes and fasten
securely with the supplied self-etching TORX screws.
Use the cable TRE 990 113/850 to connect the trans-
former to the exchange. Plug in the 4-pole connector
to the AC outlet of the transformer unit and connect the
other end to the flatpin connectors on the input filter in
the cabinet.
Technical data:
Input voltage tolerance
+/- 10%
Input frequency
50/60 Hz
Dielectric strength
primary/secondary
3500V
Mains
cable
Pr
imar
y
fuse
Secondar
y
fuse
A
C
output
•
Fuse ratings for transformer unit
voltage version
primary
secondary
230 V
T 3.15 A
T 6.3 A
127 V
T 6.3 A
T 6.3 A
Mounting of the transformer unit
exchange power cable
TRE 990 113/850