User guide

Data Ports

Serial Data Port

11342L Rev. 8 6/4/2004 105SL User Guide 61

RS-232 Interface Connections

The printer is configured as Data Terminal Equipment (DTE).

Figure 34 illustrates the internal connections of the printer’s RS-232 connector.

Figure 34 • RS-232 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 35

illustrates the connections required for this cable.

Figure 35 • RS-232 Cable Connections

Note • The cable used to connect the printer to a computer must be a null modem (crossover)

cable. If you want to connect the printer to any other DTE devices, a null modem cable must

also be used.

NOTE: Pin 1 is unused and unterminated.

RS-232 Connector (DTE)

Rear Panel Female DB-9

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

+5 VDC signal source

+5 VDC

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.