GE
Energy
D400 Substation Data Manager User's Manual
29
DTE (default)
1
2
3
4
5
A
B
DCE
1
2
3
4
5
A
B
Switch SW3/SW4 Configuration
Switches
SW3
(for Port 2) and
SW4
(for Port 1) control the signals on Pins 4 and 6 of the
RS-232 port. Each switch contains four switch positions that can each be set to
ON
or
OFF
to select the appropriate function for the port option. See illustrations below showing
the switch positions for each setting.
RS-232 Card Switch SW3/SW4 Settings
SW3/SW4 Positions
SW3/SW4 Positions
Function
Pin 6
Signal
1 2 3 4
Pin 4
Signal
5 6 7 8
DTE (default) DSR Input OFF OFF ON OFF DTR
Output
OFF ON OFF OFF
DCE
DTR
Output
OFF ON OFF OFF DSR
Input OFF OFF ON OFF
IRIG-B
Enable
Ground
OFF OFF OFF ON IRIG-B
Output
ON OFF OFF OFF
