Barracuda 1 and 2 Product Manual, Rev. C
27
Air-flow cooling
ST11950WD and ST12550WD wide differential drives
MTBF
500k hours
Card
Component
Reference
case temperature (°C)
PYGX
Transmitter
U5
57
PYGX
Writer
U35
66
PYGX
LSI
U4
60
PYGX
VIC2
U20
59
PYGX
1021
U55
57
HDA housing
Figure 11
48
The air-flow pattern with which the temperature guidelines above were
generated is shown in Figure 6 (opposite direction). Local average air
velocity was 0.61 msec (120 lfpm) and inlet air temperature to the drive was
30°C (86°F).
The maximum allowable HDA case temperature is 60°C.
U5
U35
U4
U20
U55
Figure 10. PYGX temperature measurement locations
Measure the HDA housing temperature at the location specified in Figure 11.
.50
1.00
Figure 11. Temperature measurement location
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