Adaptec SBC-599 - Manual (Page 105)

Chapter B Pin Assignments 95
Power LED/keyboard lock connector
(CN4)
SBC-596/599 Keyboard lock connector (CN4)
Pin Signal
1 PWLED
2 NC
3 GND
4 KLOCK
5 GND
Fan power connector (CN5)
SBC-596/599 Fan power connector (CN5)
Pin Signal
1 N/C
2 GND
3 +12 V
1 2 3 4 5
3 2 1