Chris Radek wrote: > With your four > signals maybe you just have the differential equivalent of mine? > Yes, and one of the advantages of that is it gives a clear indication if the light bulb fails. All 4 signals go the same way and you lose the differential nature of the signals. (I will bet it DOES have an actual bulb, or was made just after the first LEDs came out, they used this in Allen-Bradley and other CNC controls as a fail-safe scheme.)
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