System Audio Connector Pin Assignments; Optional I/O Serial Port Pin Assignments - HPE GL20 Maintenance And Service Manual

Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

System audio connector pin assignments

Pin
1
2
3

Optional I/O serial port pin assignments

The two optional I/O serial ports are compatible with RS-232, RS-422, and RS-485 signals.
Pin
1
2
3
1 2 3 4 5
6 7 8 9
RS-232 signal
DCD
RxD
TxD
Assignment
Red
Green
Blue
NC
Ground
Ground
Ground
Ground
NC
Ground
NC
DDC Date
H Sync
V Sync
DDC Clock
Assignment
Mic
Line in
Line out
RS-422 signal
Tx-
Tx+
Rx+
System audio connector pin assignments
RS-485 signal
DATA-
DATA+
NC
Table Continued
33