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CHAPTER 3: SETTING UP COMMUNICATION CARDS
Switch SW3/SW4 configuration
Function
Pin 6 Signal
DTE (default)
DSR Input
DCE
DTR Output
IRIG-B Enable
Ground
D400 SUBSTATION GATEWAY USER'S MANUAL
Figure 9: Switch SW1/SW2 configuration for port DTE (default)
Figure 10: Switch SW1/SW2 configuration for port DCE
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.
Table 5: RS-232 Card Switch SW3/SW4 Settings
SW3/SW4 Positions
1
2
OFF
OFF
ON
OFF
ON
OFF
OFF
OFF
OFF
The switch positions are listed for:
•
DTE (Pin 4 DTR Output to DCE and Pin 6 DSR Input from DCE). See Figure 11.
•
DCE (Pin 4 DTR Input from DTE and Pin 6 DSR Output to DTE). See Figure 12.
•
IRIG-B Enable (on Pin 4) and Ground (on Pin 6). See Figure 13.
Figure 11: Switch SW3/SW4 configuration for port DTE (default)
O N
1
2
3
A
1
2
B
A
1
2
B
Pin 4 Signal
3
4
OFF
DTR Output
OFF
DSR Input
ON
IRIG-B Output
4
5
6
7
GENERAL
RS-232 ADAPTER
3
4
5
3
4
5
SW3/SW4 Positions
5
6
7
OFF
ON
OFF
OFF
OFF
ON
ON
OFF
OFF
8
8
OFF
OFF
OFF
35
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