GE 994-0089 User Manual

Page of 92
GE Energy 
 
62 
 
994-0089–1.00–2, General
 
 
4.10 
Front Maintenance Port 
The serial communications port on the front panel of the D400 provides a local 
connection with the D400 to perform the initial setup of the D400 and to carry out 
maintenance and diagnostic procedures. The front maintenance port provides a direct 
serial connection to a PC using a serial null modem cable (GE Part No. 977-0529/72), 
which is supplied with the D400.  
See section “6.1 Connecting to the D400 for the First Time” for more information on 
setting up communications with the D400. 
» 
To connect your computer to the D400: 
Connect the supplied serial null modem cable  (GE Part No. 977-0529/72) to your 
computer’s serial communications port and to the D400's front communications port. 
D400 Front Serial Port DB-9 Pin Out 
Pin # 
Signal 
1 DCD 
2 RX 
Data 
3 TX 
Data 
4 DTR 
5 GND 
6 DSR 
7 RTS 
8 CTS 
9 Not 
Connected 
 
Minimal Required Connection 
The minimal cable connection required to establish successful communication between 
your PC and the D400 is as follows: 
PC Pin # 
D400 Pin # 
Signal 
9-Pin Female 
9-Pin Female  
(w/o Converter) 
 
2 3 
TX 
3 2 
RX 
5 5 
GND