User Manual

Table Of Contents

Data Connections

Serial Data Port

R4Mplus User Guide 105

RS-232 Interface Connections

The printer is configured as Data Terminal Equipment (DTE). Figure 37 shows the internal

connections of the printer’s RS-232 connector.

Figure 37 • RS-232 Internal Connections

7 RTS Request to send—output from printer

8 CTS Clear to send—input to printer

*9 +5 V DC +5 VDC

* This pin is also available as a +5 VDC power source at 750 mA. To enable this capability, a jumper on the computer’s

main logic board needs to be installed on JP1, pins 2 and 3.

Note • An interface module is required for RS-422/RS-485 interface support

(refer to page 107).

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

any other DTE devices.

Table 18 • Serial Data Connector Pin Configuration (Continued)

Pin Number Name Description

(TD)

(RD) (RD)

(RTS) (RTS)

(DSR) (DSR)

(SG) (SG)

(DTR) (DTR)

DTE DTE