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Black box - Wikipedia, the free encyclopedia
In science, computing, and engineering, a black box is a device, system or object which can be viewed in terms of its input, output and transfer characteristics ...
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12653 New Box Black Box SW421A R2 Code Operated Switch | eBay
Find best value and selection for your 12653 New Box Black Box SW421A R2 Code Operated Switch search on eBay. World's leading marketplace...
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Control up to eight serial devices—RS-232 or RS-422—from ...
Control up to eight serial ... The Black Box ® Code-Operated ... SW421A-R2: RS-422 async Connectors — SW853A-R2, SW421A-R2: (5) ...
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