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The CCM red light blinks intermittently. Do I have a communications problem?

Not if you are performing mixed mode communications - devices speaking Sy/Max and Modbus protocols on a single daisy chain. In this case the red light will blink intermittently. This is normal operation.
Refer to the CCM Instruction Bulletin 48049-151-xx for various L.E.D. interpretations.

CTA-ID : 9741
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