8. If your classroom has a serial commands-controlled device, connect the serial wires to the COM 1 port as show below with
the included Phoenix connector. (Wires are not provided with your CM3000.)
NOTE: Depending on your device you may need to switch the TX and RX wires. In a 9-pin connector the standard is to use
pins 2 and 3 for TX and RX, but there is no standard as to which is which. Most manufacturers use pin 2 for TX and pin 3 for
RX, but over 10% use the reverse.
24
TX1
RX1
GND
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