• The Challenge About a hundred specialized 2” strip printers were threatened with obsolescence when Marquette Medical Systems, Milwaukee, Wisconsin, updated a patient monitoring system for a major hospital to a PC-based system. The facility hoped to be able to continue to use the specialized printers, which provided a permanent record of patient conditions, but the legacy printers used an RS-422 data signal and unusual connector pin-out. They would not communicate with RS-232 based PCs. • The Solution Rather than replace all the printers, Tom Gilbert, an engineer at Marquette Medical Systems, contacted B&B Electronics to see if we could provide an interface adapter to accommodate the unusual combination. A customized version of B&B Electronics Model 422LP9R, a 9-pin RS-232 t

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