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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 DevicesThe 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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