Appendix B: Interface Specifications
A. INTRODUCTION
This section details 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 RS232 connector on the printer side is a female
Pin | Direction | Definition |
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1 | In | DSR |
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2 | In | RxData |
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3 | Out | TxData |
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5 | - | Ground |
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6 | Out | DTR |
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7 | Out | RTS |
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8 | In | CTS |
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9 | Out | +5V |
Note: Pin 9 is reserved for factory use only. Do not connect this pin if you are using a general host like a PC.
Connection with host:
Host 25S | Printer 9P | Host 9S | Printer 9P |
(PC or compatible) | (PC or compatible) |
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DTR 20 | 1 DSR | DTR 4 | 1 DSR |
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DSR 6 | 6 DTR | DSR 6 | 6 DTR |
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TX 2 | 2 RX | TX 3 | 2 RX |
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RX 3 | 3 TX | RX 2 | 3 TX |
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CTS 5 | 7 RTS | CTS 8 | 7 RTS |
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RTS 4 | 8 CTR | RTS 7 | 8 CTS |
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GND 7 | 5 GND | GND 5 | 5 GND |
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34 Interface Specifications