
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 (receive data) input
TXD (transmit data) output
DTR (data terminal ready) output
SG (signal ground)
DSR (data set ready) input
RTS (request to send) output
CTS (clear to send) input
+5VDC signal source
+5VDC signal source
RXD (receive data) input
TXD (transmit data) output
DTR (data terminal ready) output
SG (signal ground)
DSR (data set ready) input
RTS (request to send) output
CTS (clear to send) input
+5VDC signal source
1
2
3
4
5
6
7
8
9
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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