D25
User's Manual
GE Grid Solutions
72
994-0081-3.00-21
GE Information
Communications Ports,
Continued
Table: Serial
Port Pinouts
Pinouts for COM3 and COM4 serial ports for both RS-232 to RS-485
configurations:
DB-9 Pin
RS-232
RS-485
1
CD
N/C
2
RX
RX-
3
TX
TX-
4
N/C
N/C
5
GND
Com GND
6
N/C
N/C
7
RTS
TX+
8
CTS
RX+
9
EARTH GND
EARTH GND
2-Wire RS-485
Cable
Schematic of the cable wiring necessary for 2-Wire RS-485 operation.
Description PIN #
PIN # Description
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
N/C
Data -
Data -
N/C
Common Ground
N/C
Data +
Data +
Earth Ground
N/C
Data -
Data -
N/C
Common Ground
N/C
Data +
Data +
Earth Ground
Summary of Contents for D25
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