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RS-232RS-422 INTERFACE CONVERTER
10
Figure 3-2. Sample DIP-Shunt Setting.
Figure 3-2 shows the DIP-shunt settings used for an application like the one illustrated in
Figure 3-3a.
NOTE
The filled-in rectangles in Figure 3-2 indicate the jumpers that contain a DIP-shunt.
CAUTION
Never set both ports the same: the clocks will not operate correctly. If two DTEs are
connected through the Converter, a modem eliminator is required in order to avoid
setting both ports the same. If two DCEs are connected together, a cross-over cable is
required.
S1
OFF <-> ON
POWER
XW1A
XW2A
XW3A
XW4A
XW4B
XW5A
XW5B
XW1B
XW2B
XW3B
CR8
CR5
CR6
CR10
CR9
CR4
CR7
P1
J2
DB37 PIN
FEMALE
DB25 PIN
FEMALE
DTE
DTE
DTE
DCE
DCE
DCE
DTE
DTE
DCE
DCE
DSR
CTS
DATA
DSR
CTS
DATA
RS-422 TO RS-232 DTR/DSR
RS-422 TO RS-232 RTS/CTS
RS-422 TO RS-232 DATA
RS-232 TO RS-422 DTR/DSR
RS-232 TO RS-422 RTS/CTS
RS-232 TO RS-422 DATA
RS-422 INTERFACE
SET TO DCE
RS-232 INTERFACE
SET TO DTE
J1