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Appendix
Serial Port Interface
12/23/2009 KR403 Integrators Guide P1016701-001
Serial Port Interface
When XON/XOFF handshaking is selected, data flow is controlled by the ASCII
control codes DC1 (XON) and DC3 (XOFF). The DTR control lead will have no
effect.
Interconnecting to DTE Devices — The printer is configured as data terminal
equipment (DTE). To connect the printer to other DTE devices (such as the serial
port of a personal computer), use an RS-232 null modem (crossover) cable. Figure
31 shows the required cable connections.
Connecting the Printer to a DTE Device
Pin Description
1Not used
2 RXD (receive data) input to the printer
3 TXD (transmit data) output from the printer
4 DTR (data terminal ready) output from the printer -- controls
when the host may send data
5 Chassis ground
6 DSR (data set ready) input to the printer
7 RTS (request to send) output from the printer -- always in the
ACTIVE condition when the printer is turned on
8 CTS (clear to send) - Not used by the printer
9Not Used
DB-25S
Connector
to DTE Device (PC)
DB-9P
Connector
to Printer
DB-9P
Connector
to Printer
DB-9S
Connector
to DTE Device (PC)
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