S-tec 55x Installation Manual Link

The S-TEC 55X accepts both analog and digital inputs for navigation tracking:

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Typically mounted in the wing root or under the cabin floorboards, connecting directly to the aileron bellcrank or control T-bar. The S-TEC 55X accepts both analog and digital

Use shielded, twisted-pair wire (MIL-C-27500) for all signal lines, including servo tachometer lines, turn coordinator inputs, and navigation bus lines. including servo tachometer lines