96Magtrol Model DSP7000 Dynamometer ControllerChapter8 – Optional Equipmentoperation8.3 rs232 interfaCeThe DSP7000 is equipped with an RS-232 (serial) interface that communicates with the host computerthrough a Db-9 interface connector. The connector pin-out consists of 2-Tx, 3-Rx and 5-gND.5. GND1. DCD6. DSR9. RI3. RX8. CTS2. TX4. DTR7. RTSFigure 8–13 RS-232 Interface8.3.1 rS-232 inSTallaTion1. Remove the two Philips pan head screws at each side of the cover of DSP7000 as shown inFigure 8–1 DSP7000 Top Cover, and then remove the cover.2. Remove the four Phillips pan head screws from the back panel covering the RS-232 Cardslot and remove the panel.3. Plug the RS232 card into the female header of main board as shown in Figure 8–14 RS-232Card Installation. Ensure the component side of the RS-232 card is in left.