Technosoft 2018
16
iPOS4808 VX Technical Reference
3c
m
min
.
2
c
m
m
in
.
3c
m
mi
n .
3cm
min.
Figure 3.2 Recommended spacing for vertical mounting, worst case: non-metallic, closed box
For ventilation holes / slots that pierce a metallic wall also used for EMI shielding, the maximum slot
length
d
should be less than
λ/16, where λ is the wavelength corresponding to maximum filtered
frequency (f
f
):
f
f
d
⋅
⋅
=
<
16
10
3
16
8
λ
If ventilation driven by natural convection is not enough to maintain the temperature surrounding
the iPOS4808 drive(s) inside the limits indicated,
then
alternate forced cooling methods must be
applied.
For thermal calculations, each iPOS4808 drive can be assumed to generate 1.5 Watt (= 5
BTU/hour) at idle, and up to TBD Watt worst case while driving a motor.
Horizontal Mounting
When iPOS4808 is mounted horizontally, its overall envelope (size) including the recommended
mating connector is shown in
The iPOS4808 has 6 fixing tabs and one groove that may
details the fixing tabs and groove position shown with red
arrows.
2
t
y
p
6
.9
±
0
.2
36.8 -
0
0.1
9
.4
t
yp
56.4 typ
Figure 3.3 Overall dimensions for horizontal mounting