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Data Ports
Serial Data Port
362
13291L-001 Rev. A S4M Maintenance Manual 10/27/05
RS-232 Interface Connections
The printer is configured as Data Terminal Equipment (DTE). Figure A-1 shows the internal
connections of the printer’s RS-232 connector.
Figure A-1 • RS-232 DB9 MLB Connections
When the printer is connected via its RS-232 interface to Data Communication Equipment
(DCE) such as a modem, use a standard RS-232 (straight-through) interface cable. Figure A-2
illustrates the connections required for this cable.
Figure A-2 • RS-232 to DCE Cable Connectors
Note • Use a null modem (crossover) cable to connect the printer to a computer or any other
DTE device.
+ 5VDC signal source
RXD (re ce ive data) input
TXD (transm it data) o utp ut
DTR (data te rm inal ready) o utp ut
SG (signal ground)
DSR (data s e t ready) input
RTS (request to se nd) output
CTS (clear to send) input
+ 5VDC signal source
+ 5VDC signal source
RXD (re ce ive data) input
TXD (transm it data) o utp ut
DTR (data te rm inal ready) o utp ut
SG (signal ground)
DSR (data s e t ready) input
RTS (request to se nd) output
CTS (clear to send) input
+ 5VDC signal source
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
R1
+ 5VDC
1 K
DTE
(Printer)
DCE
(Modem, etc.)
RXD (receive data)
TXD (transmit data)
DTR (data terminal ready)
SG (signal ground)
DSR (data set ready)
RTS (request to send)
CTS (clear to send)
+5 VDC signal source
NOTE • Pin 1 is unused and unterminated at the printer.
2
3
4
5
6
7
8
9
2
3
4
5
6
7
8
9
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