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DTE (default)
A
1
2
B
DCE
A
1
2
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
Pin 6
Function
Signal
DTE (default)
DSR Input
DCE
DTR
Output
IRIG-B
Ground
Enable
3
4
5
3
4
5
SW3/SW4 Positions
1
2
3
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
ON
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SW3/SW4 Positions
Pin 4
Signal
4
5
DTR
OFF
ON
Output
DSR Input
OFF
OFF
IRIG-B
ON
OFF
Output
D400 Substation Data Manager User's Manual
GE Energy
6
7
8
OFF
OFF
ON
OFF
OFF
OFF
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