178Data Ports Serial Data Port

RS-232 Interface Connections

The printer is configured as Data Terminal Equipment (DTE). Figure 38 shows the internal connections of the printer’s RS-232 connector.

Note • Use a null modem (crossover) cable to connect the printer to a computer or any other DTE device.

Figure 38 • RS-232 DB9 MLB Connections

+5 VDC

RS-232 Connector (DTE)

Rear Panel Female DB-9

2 RXD (receive data) input

3 TXD (transmit data) output

4 DTR (data terminal ready) output

5 SG (signal ground)

6 DSR (data set ready) input

7 RTS (request to send) output

8 CTS (clear to send) input

R1

1 K

9 +5 VDC signal source

NOTE: Pin 1 is unused and unterminated.

Pin 9 is also available as a +5 VDC signal source at 750 mA. The maximum current draw may be limited by option configuration.

Important • To enable this capability, a qualified service technician must install a jumper on the printer’s main logic board on JP1, pins 2 and 3.

13383L-004 Rev. A

XiIIIPlus/R110Xi/R170Xi User Guide

9/6/07