38 GE INFORMATION D400 SUBSTATION GATEWAY INSTRUCTION MANUAL
CHAPTER 3: SETTING UP COMMUNICATION CARDS
Switch SW1/SW2 configuration
Switches SW1 (for Port 2) and SW2 (for Port 1) control the signal type of the RS-232 port.
Each switch contains ten switch positions that can each be set to position ON or OFF to
select the appropriate port option.
Table 7: RS-232 Card Switch SW1/SW2 Settings
*Use DTE or DCE settings as appropriate
DCD output is not supported in DCE mode.
If configured with SW1/SW2, each +5 V is output on Pin 1 of rear DB9 connector and is
independently isolated and fused with a PTC (positive temperature coefficient) resettable
fuse at 320 mA at 65 °C.
Figure 10: Switch SW1/SW2 configuration for port DTE (default)
Figure 11: Switch SW1/SW2 configuration for port DCE
Port Option SW1/SW2 Switch Position
12345678910
DTE (default) - see Figure 10 ON OFF ON OFF ON OFF ON OFF ON OFF
DCE - see Figure 11 - OFF OFF ON OFF ON OFF ON OFF ON
+5 V (320 mA) isolated source * ON * * * * * * * *
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