DB-9 Connectors
Printer Interface Technical Information
Z4Mplus and Z6Mplus User Guide 125
The Table below shows the pin configuration and function of the rear panel serial data
connector on the printer.
Pin Number Name Description
1 — Not connected
2 RXD Receive data—data input to printer
3 TXD Transmit data—data output from printer
4 DTR Data terminal ready—output from printer
5 SG Signal ground
6 DSR Data set ready—input to printer
7 RTS Request to send—output from printer
8 CTS Clear to send—input to printer
*9 +5 V DC +5 VDC
Note • * 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 129).
