GE D25 - Page 72

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