Appendix E Connector Pinouts E-19
Note – Fan modules in Sun Fire X4100 servers each contain two 40 mm fans (Fan A
and Fan B); fan modules in Sun Fire X4200 servers each contain one 80 mm fan (Fan
A). The same connector is used for both types of fan modules, with slightly different
assignments to connector pins, as described in TABLE E-13.
TABLE E-13 Fan Module Connector Pinouts
Pin Number Pin Name Description
1 +12V +12 V power to Fan A (and to Fan B in Sun Fire X4100 fan
modules)
2 GND Ground for Fan A (and for Fan B in Sun Fire X4100 fan
modules)
3 Fan A Tach Fan A tachometer sensor
4 Fan B Tach Fan B tachometer sensor for Sun Fire X4100 fan modules;
Presence sensor (tied to Pin 2) for Sun Fire X4200 fan modules
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