Diamond Systems Athena III User Manual - Page 12

Browse online or download pdf User Manual for Computer Hardware Diamond Systems Athena III. Diamond Systems Athena III 14 pages. Panel i/o board

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6.7

Serial Ports

The serial port connectors are six vertical DB9 male connectors. They have 4-40 thread inserts and hex
screwlocks. Ports 1-4 signals come from the 80-pin SBC connector. Ports 5-6 signals come from a 2x10 pin
expansion connector. The signal pinouts of the connectors used in the RS-232, RS-422, RS-485 protocols are
shown below.
RS-232 Configuration
DCD
1
2
DSR
RXD
3
4
RTS
TXD
5
6
CTS
DTR
7
8
RI
GND
9
10
NC
Athena III Panel I/O Board User Manual Rev A
DB9
Signal
Serial Port
Name
Connector
Pin
1
DCD 1
1
2
2
RXD 1
3
4
3
TXD 1
5
6
4
DTR 1
7
8
5
GND 1
9
10
RS-422 Configuration
NC
1
2
NC
TXD+
3
4
TXD-
GND
5
6
RXD-
RXD+
7
8
NC
GND
9
10
NC
www.diamondsystems.com
Signal
DB9
Name
Pin
DSR 1
6
RTS 1
7
CTS 1
8
RI 1
9
NC
RS-485 configuration
NC
1
2
TXD/RXD+
3
4
GND
5
6
NC
7
8
GND
9
10
NC
TXD/RXD-
NC
NC
NC
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