GE General Electric Computer Accessories 2300 V User Manual

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The Heatsink Thermal Protection function measures the power bridge heatsink and
ambient temperatures and verifies that they are at a safe operating level.

The inputs to the Heatsink Thermal Protection function are hardware thermal sensor
connections. The bridge ambient temperature thermal sensor connects to backplane
connector J4. The control rack ambient temperature thermal sensor is located on
BICM. The heatsink thermal sensors connect to FOSA. The following table
summarizes the source of the input signals of the Heatsink Thermal Protection
function.

Backplane J4 7 & 8

Bridge ambient thermal sensor

Mounted on BICM

Control rack ambient thermal sensor

FOSA TF-A

Heatsink A thermal sensor

FOSA TF-B

Heatsink B thermal sensor

FOSA TF-C

Heatsink C thermal sensor

FOSA TF-DB

Dynamic brake heatsink thermal sensor

FOSA TF-SRC

Diode source heatsink thermal sensor

The following table specifies the output variables of the Heatsink Thermal
Protection function.

Heat sink A temp

Measured temperature of heatsink A. Degrees C or
Degrees F

Heat sink B temp

Measured temperature of heatsink B. Degrees C or
Degrees F

Heat sink C temp

Measured temperature of heatsink C. Degrees C or

Degrees F

DB heat sink temp

Measured temperature of dynamic brake heatsink.

Degrees C or Degrees F

DS heat sink temp

Measured temperature of diode source heatsink.
Degrees C or Degrees F

Bridge ambient temp

Measured bridge ambient temperature. Degrees C or
Degrees F

BIC ambient temp

Measured control rack ambient temperature.

Degrees C or Degrees F

In simulator mode, the output variables are set to constant values which are the
maximum expected operating temperatures.