HP Z210 Maintenance And Service Manual page 172

Rear CPU fan
Internal serial
160 Appendix A Connector pins
Pin Signal
1 GND
2 +12V
3 TACH1
4 PWM
5 TACH2
Pin Signal
1 DTR1#
2 RXD1
3 CTS1#
4 DSR1#
5 TXD1
6 RI#
7 Ground
8 Ground
Pin Signal
9 +5V
10 +3.3V AUX
11 RTS1#
12 COM DETECT
13 DCD21#
14 -12V
15 +12V
ENWW