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Up for sale is a vintage Otis Elevonic 401 Power Amplifier I/O Board, Assembly Number 205925-1 (HT205925-1), Revision B.
This is a critical component for legacy Otis elevator control systems, featuring high-quality Burr-Brown DAC80 and ADC80 converters.
Condition Note: This board was pulled from a working environment but has not been bench-tested recently. Please see photos for physical condition. The solder side shows some expected age-related texture/crinkling on the traces (see Image 3), but all components appear intact with no signs of overheating or "burnt" spots.
Notice: Sold as-is due to the specialized nature of industrial elevator electronics. Great for maintenance stock or a core for refurbishment.

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