Open Frame AC-DC Converters SWE Series
Edition 5/5.2000 11/13
Safety and Installation Instructions
Installation Instructions
Our AC-DC converters are components, intended exclu-
sively for inclusion within other equipment by an industrial
assembly operation or by professional installers. Installation
must strictly follow the national safety regulations in compli-
ance with the enclosure, mounting, creepage, clearance,
casualty, markings and segregation requirements of the
end-use application. See also:
Technical Information: In-
stallation and Application.
Connection to the system shall be made via the terminal
block at the rear side of the unit according to
Terminal As-
signment.
For safety reasons it is essential to connect the FG and
ACG terminals with protective earth. See also:
Safety of op-
erator accessible output circuit.
A fuse is built-in in the connection from the L terminal of the
unit. Since this fuse is designed to protect the unit in case of
an overcurrent and does not necessarily cover all customer
needs, an external fuse suitable for the application and in
compliance with the local requirements should be installed
in the wiring to the phase terminal L. A second fuse in the
wiring to the neutral terminal N is needed if:
•Local requirements demand an individual fuse in each
source line
•Neutral and earth impedance is high or undefined
•Phase and neutral of the mains are not defined or cannot
be assigned to the corresponding terminals (L to phase
and N to neutral)
Important: Do not open the modules, or guarantee will
be invalidated.
Make sure that there is sufficient air flow possible for con-
vection cooling. This should be verified by measuring the
ambient temperature when the unit is installed and oper-
ated in the end-use application. The maximum specified
ambient temperature
T
A max must not not be overriden, de-
pending on output power and mounting method. See:
Ther-
mal Considerations
and table:
Allowed output power by
mounting method
.
Mounting Methods
Care should be taken that there is sufficient air convection
around the power supply unit.
Whenever possible, forced air cooling is recommended to
obtain a higher reliability.
For open frame or covered structures:
a) Horizontal mounting: Use tapped holes at bottom side of
the frame for fastening to the chassis. Use M3 screws
with torque at less than 5 kpcm. Screw length should not
damage the insulation.
Case mounted on
material with good
heat conduction
Case side in
contact with
chassis
Air
Ample
spacing
09063
Upper panel
with good
ventilation
Air
Air
Ample spacing
This surface in contact
with chassis side or
with convection cooling
Main chassis
Case mounted on material
with good heat conduction
09064
Fig. 19
Hoirizontal mounting
Fig. 20
Vertical mounting
b) Vertical mounting: Holes are provided on the flange; M3
screws should be used.
Protection Degree
The protection degree of the AC-DC converters is IP 20,
exept in the vicinity ot the terminal block, where it depends
on the installation.