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2 selecting rs232 or 5v logic for each port, 3 connections to the sdm-sio4, 1 transient protection and grounding – Campbell Scientific SDM-SIO4 4-Channel Serial I/O Interface User Manual

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2 selecting rs232 or 5v logic for each port, 3 connections to the sdm-sio4, 1 transient protection and grounding | Campbell Scientific SDM-SIO4 4-Channel Serial I/O Interface User Manual | Page 14 / 82 2 selecting rs232 or 5v logic for each port, 3 connections to the sdm-sio4, 1 transient protection and grounding | Campbell Scientific SDM-SIO4 4-Channel Serial I/O Interface User Manual | Page 14 / 82