24
SANKEN ELECTRIC CO., LTD.
December
201
6
PAN40004-001E
-02
Base power unit installation
Adequate airflow is mandatory to allow the fan inside the base
power unit to cool the unit and the DC modules. If the cooling
effect of the fan is insufficient, output could stop.
• Ensure there is at least 50 mm of free airspace clearance both
at the input side of base power unit and at the output side of the
DC modules for airflow. See illustrations below for recommenda-
tions.
• When attaching the base power unit to a rack by screws, be sure
to use M4 screws and keep the insertion length within 3.5 mm
from surface of the base power unit case in order to maintain
insulation clearance distance to internal parts. Use M4 screws
(JIS B 0205 or equivalent) with 1.2 N•m (12.3 kgf•cm) torque.
• If the product is used in a dusty environment, an air filter may
be required. In such a case, the filter may affect ventilation effi-
ciency and weaken the cooling effect of the fan, causing output to
stop. Therefore derating is required for this case. Please consult
with Sanken for the details.
• If the fan stops and/or the rotational speed of the fan gets
lowered, the product may stop due to thermal protection. Life
expectancy of the fan varies depending on usage conditions,
therefore regular inspections of the fan are required for improved
reliability. Please consult with Sanken for the details.
!
CAUTION: Do not allow
screws to penetrate more
than 3. 5 mm into the base
power unit case
Base power unit
Exterior case wall
Screws excluded
from this interior
area
3.5 mm
3.5 mm
Rack rail
Rack rail
Case Top View
50 mm
air space
minimum
50 mm
air space
minimum
Base power unit
(rear view)
Rack rail
Horizontal Installation A
(Case top)
(Case top)
(Case top)
Vertical Installation B
Vertical Installation C
Base power unit
(Label)
Airflow out
of base power
unit front
(at DC modules)
Airflow into
base power
unit rear
Mounting orientations for
normal installations
Ventilation requirements
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