Appendix d. rs-485 connector, 3-pin terminal block – Campbell Scientific NL100 Network Link Interface User Manual

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Appendix D. RS-485 Connector, 3-Pin
Terminal Block

The RS-485 port is for connecting an MD485 multidrop interface to the
NL100. The MD485 attaches to the NL100 via a twisted pair cable such as the
#9720. The following table shows the pin-out information for the RS-485 port.

PIN I/O FUNCTION

1 GND

Signal

Ground

I/O

485_IO- (A)

I/O

485_IO+ (B)

I = Signal Into the NL100, O = Signal Out of the NL100

D-1