Product manual

28 Barracuda 9FC Product Manual, Rev. C
PCB and HDA temperatures
To obtain the maximum temperature for each of the reference components listed, add 20°C to the 1,000,000
hour MTBF case temperatures. The maximum allowable HDA case temperature to meet the 1,000,000 hour
MTBF is 45°C. The maximum allowable HDA case temperature is 60°C (see Figure 9). Operation of the drive
at the maximum case temperature is intended for short time periods only. Continuous operation at the elevated
temperatures will reduce product reliability.
The air-flow pattern with which the temperature guidelines above were generated is shown in Figure 7. Local
average air velocities were 1.2 m/sec (235 lfpm).
Figure 8. PCB temperature measurement locations
Figure 9. HDA case temperature measurement location
Card Component Reference
MTBF
1,000,000 hours
case temperature (°C)
YYJX Voltage regulator 1 44
YYJX Aurora 2 59
YYJX Servo DSP 3 48
YYJX Motor Control 4 52
3
4
2
1
1.00