Honeywell 2020-5B User Guide - Page 46
Connecting the Base with Serial Wedge, ACK/NAK Mode
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ACK/NAK Mode ACK/NAK On * ACK/NAK Off Connecting the Base with Serial Wedge The 2020 uses TTL signal levels to wedge into an RS-232 serial network. Use only 2020 serial wedge cables to prevent damage to the base. Refer to Connecting the Base with RS-232 Serial Port on page 2-8 to set the baud rate and communications protocol. 1. Turn off power to the computer. 2. Disconnect the existing serial cable from the computer. 3. Connect the appropriate interface cable to the base. Make sure the cables are secured in the wireways in the bottom of the base and that the base sits flat on a horizontal surface. Note: For the base to work properly, you must have the correct cable for your type of computer. 4. Plug the serial connector into the serial port on your computer. Tighten the two screws to secure the connector to the port. 1 - 26