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Houston Instrument DMP-160 Series Plotters
(DMP-161, DMP-162, and DMP-162R) RS-232C Serial Interface Connector on Plotter |
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| Pin # | Signal | Description |
| 1 | GND | Chassis Ground |
| 2 | TXD | Transmit Data |
| 3 | RXD | Receive Data |
| 4 | RTS | Request to Send |
| 5 | CTS | Clear to Send |
| 6 | NC | Not Connected |
| 7 | GND | Signal Ground |
| 8-19 | NC | Not Connected |
| 20 | DTR | Data Terminal Ready |
| 21-25 | NC | Not Connected |