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Author Topic: COM1, Pin 4: Is this required?  (Read 10449 times)

Joel Moore

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COM1, Pin 4: Is this required?
« on: May 18, 2004, 03:59:34 PM »
What are the consequences of leaving COM1, pin 4 unconnected on the T100MD888+?
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Re:COM1, Pin 4: Is this required?
« Reply #1 on: May 19, 2004, 04:11:39 PM »
For T100MD+ PLC, only pin 2,3 and 5 are required. The rest can be left unconnected.

However, for T100MX+ as well as H-series PLCs, pin 4 is required to supply power to the opto-isolated interface.
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