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The Yokogawa KN-004A (sometimes referenced as KN004-A) is a connection box designed to interface repeater compasses and related navigation equipment with the main gyrocompass system. It typically serves as a junction/interface unit in older Yokogawa marine gyrocompass configurations, routing signals from the gyro compass system to repeater(s) on the bridge.
Power Supply:
– Primary: 24 V DC (nominal)
– Acceptable range: ~20 – 30 V DC
– Some installations may use an optional AC adapter for 100 – 220 V AC shipboard mains.
Signal Interfaces:
– Heading & ROT (Rate of Turn) signals — analog and serial formats (IEC 61162-1/2 typical on CMZ systems) for repeaters and bridge instruments.
– Multiple repeater circuits supported (exact number dependent on system setup).
Heading Accuracy:
– Static: ~±0.25° × sec Lat
– Dynamic: ~±0.75° × sec Lat
Follow-Up Accuracy: ≤ 0.1°
Max Follow-Up Speed: ~30°/s
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