34
GENERAL
D400 SUBSTATION GATEWAY USER’S MANUAL
RS-232 ADAPTER
CHAPTER 3: SETTING UP COMMUNICATION CARDS
Figure 8: RS-232 adapter top side
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 five switch positions that can each be set to position
A
or
B
to select
the appropriate port option.
Table 4: RS-232 Card Switch SW1/SW2 Settings
*Use DTE or DCE settings as appropriate
NOTE
DCD output is not supported in DCE mode.
NOTE
Each +5 V output is independently isolated and fused with a PTC (positive temperature
coefficient) resettable fuse at 320 mA at 65 °C.
Port Option
SW1/SW2 Switch Position
1
2
3
4
5
DTE (default) - see Figure 9
A
A
A
A
A
DCE - see Figure 10
—
B
B
B
B
+5 V (320 mA) isolated source
B
*
*
*
*
