Ki 256 Installation Manual -

Do not combine AC ground and DC ground. The KI 256 uses separate returns. Combining them creates ground loops that induce 400Hz noise into the syncro outputs, causing HSI oscillations.

Follow the specific wiring diagram found in the KFC 150/200/225 installation manuals . Connector Mapping: Typical connections include: Power: 14V14 cap V 28V28 cap V DC depending on the unit variant. Gyro Power: 26VAC26 cap V cap A cap C 400Hz400 cap H z for the gyro motor. Attitude Data: Signals to the pitch and roll computers. Command Bars: Signals from the computer to the display. 4. Post-Installation Testing and Calibration ki 256 installation manual

A 10VAC, 430Hz reference signal sent out by the autopilot computer to power the internal pick-off transformers. Do not combine AC ground and DC ground