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PLoss
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Drive heatsink watt loss (W) 1
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THSP_max
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Maximum heatsink plate temperature
This is the temperature at the surface of the heatsink plate. Set U4-08 [Heatsink Temperature] to monitor the drive heatsink temperature. Maximum temperatures are different for different models.
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B001 - B012: 90 °C (194 °F)
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2001 - 2021: 90 °C (194 °F)
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2030 - 2070: 80 °C (176 °F)
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4001 - 4012: 90 °C (194 °F)
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4018 - 4038: 80 °C (176 °F)
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TAmb
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Ambient temperature of the external heatsink
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RθHSP
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Drive heatsink plate thermal resistance
This value is 0.05 K/W.
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RθHSP-EHS
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You can use the formula to calculate thermal resistance between the drive heatsink plate and the external heatsink.
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Ath
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Heat transfer area between drive heatsink plate and external heatsink
Note:
Heat generation across the drive heatsink plate is not equal because of the arrangement of internal components. The effective area for thermal transfer is only 70% of the drive heatsink plate area.
Use the H and W values of the drive exterior dimensions 2 to calculate the area of the drive heatsink plate.
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λComp
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Thermal conductivity of the thermal compound
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dComp
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Thickness of the thermal compound (when applied)
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RθEHS
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Thermal Resistance of the external heatsink
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