Rockwell Automation 2093-xxxx Kinetix 2000 Multi-axis Servo Drive User Manual User Manual
Page 23
Publication 2093-UM001A-EN-P — March 2007
Planning the Kinetix 2000 Drive System Installation
23
For backplane power loading requirements of other ControlLogix power
supplies, refer to the ControlLogix Selection Guide, publication 1756-SG001.
In this example, the amount of power dissipated inside the cabinet is the sum
of the Kinetix 2000 system value (387 W) and the ControlLogix system value
(34 W) for a total of 421 W.
With no active method of heat dissipation (such as fans or air conditioning)
either of the following approximate equations can be used.
The maximum ambient rating of the Kinetix 2000 system is 50 °C (122 °F)
and if the maximum environmental temperature is 30 °C (86 °F) then Q=606
and T=20 in the equation below.
In this example, the enclosure must have an exterior surface of 4.58 meters
2
. If
any portion of the enclosure is not able to transfer heat, it should not be
included in the calculation.
Since the minimum cabinet depth to house the 230V drive (selected for this
example) is 200 mm (7.9 in.), then the cabinet needs to be approximately
2000 mm (78.7 in.) high x 1000 mm (39.4 in.) wide x 200 mm (7.9 in.) deep.
2 x (0.2 x 1.0) + 2 x (0.2 x 1.0) + 2 x (1.0 x 2.0) = 4.8 m
2
2 x (
7.9
x 39.4) + 2 x (
7.9
x 39.4) + 2 x (39.4 x 78.7) = 48 ft.
2
Because this cabinet size is considerably larger than what is necessary to house
the system components, it may be more efficient to provide a means of cooling
in a smaller cabinet. Contact your cabinet manufacturer for options available to
cool your cabinet.
Metric
Standard English
Where T is temperature difference between
inside air and outside ambient (°C), Q is heat
generated in enclosure (Watts), and A is
enclosure surface area (m
2
). The exterior surface
of all six sides of an enclosure is calculated as
Where T is temperature difference between
inside air and outside ambient (°F), Q is heat
generated in enclosure (Watts), and A is
enclosure surface area (ft²). The exterior surface
of all six sides of an enclosure is calculated as
A = 2dw + 2dh + 2wh
A = (2dw + 2dh + 2wh) / 144
Where d (depth), w (width), and h (height) are in
meters.
Where d (depth), w (width), and h (height) are in
inches.
A
0.38Q
1.8T
1.1
–
------------------------
=
A
4.08Q
T
1.1
–
----------------
=
A
0.38 421
(
)
1.8 20
( ) 1.1
–
--------------------------------
4.58m2
≈
=