User Manual

Table Of Contents

106 R4Mplus User Guide

Data Connections

Serial Data Port

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 38

illustrates the connections required for this cable.

Figure 38 • RS-232 to DCE Internal Connections

RS-232 Interconnections Using a DB-25 Cable

To connect the printer’s RS-232 DB-9 interface to a DB-25 connector, an interface adapter is

required (Zebra part number 33138). A generic DB-25 adapter may also be used, however, the

+5 VDC signal source would not be passed through. Figure 39 shows the connections required

for the DB-9 to DB-25 interface.

Note • You must use a a null modem (crossover) cable to connect the printer to a computer or

any other DTE devices.

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.