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User's Guide 79
Appendix B: INTERFACE SPECIFICATIONS
Introduction
This appendix presents the interface specifications of I/O ports for the printer. These
specifications include pin assignments, protocols and detailed information about how to
properly interface your printer with your host or terminal.
Serial
The RS-232 connector on the printer side is a female, DB-9.
Pin Direction Definition
1 In DSR
2 In RxData
3 Out TxData
5 - Ground
6 Out DTR
7 Out RTS
8 In CTS
9 Out +5V
Note: Pin 9 is reserved for KDU (keyboard device unit) only, therefore do not
connect this pin if you are using a general host like a PC.