RS-232 connector (DTE)

rear panel DB-25S

 

1

FG (frame ground)

 

2

TXD (transmit data) output

 

3

RXD (receive data) input

 

4

RTS (request to send) output

 

6

DSR (data set ready) input

+5 V

7

SG (signal ground)

 

 

F1

9

+5 VDC source

1 Amp

 

 

 

20

DTR (data terminal ready) output

Figure 37

RS-232 Interconnections

The printer is configured as Data Terminal Equipment (DTE). Figure 37 illustrates the internal connections of the printer’s RS-232 connector.

Figure 38 illustrates the connections required to interconnect the printer with the standard 9-pin serial port connector on a computer.

NOTES: If using a 9-pin to 25-pin adapter plug attached to the computer, use a null modem cable between the adapter plug and the printer.

To connect the printer to other DTE devices with DB-25 connectors (such as the serial port of a PC), an RS-232 null modem (crossover) cable should be used.

100

Zebra R-140 User’s Guide