National Instruments FieldPoint FP-1000 - RS-232 Interface Specifications; Connecting the FP-1001 to the Serial Network; Figure 2-9. RS-232 Connector Pinout for the FP-1000

Chapter 2 Hardware Installation and Configuration
FieldPoint FP-1000/1001 User Manual 2-8
© National Instruments Corporation
The RS-485 repeater port on the FP-1000 must always be wired in
4-wire, full-duplex mode.
RS-232 Interface Specifications
RS-232 specifies a maximum cabling distance of 50 ft., but
improvements in line drivers and cabling technology often allow you to
design your network beyond the recommendations of the specification.
The RS-232 connector is 9-pin female DSUB connector whose pinout
is shown in Figure 2-9.
Figure 2-9.
RS-232 Connector Pinout for the FP-1000
The FP-1000 does not use RS-232 hardware handshaking, but it still
asserts the RTS and DSR signals for host computers or software that
may require these signals. A host computer that does not use these
signals does not need to connect to them.
Connecting the FP-1001 to the Serial Network
This section describes the network configurations possible with the
FP-1001 FieldPoint network module.
One option for connecting the FP-1001 is to connect it to the RS-485
repeater port of an FP-1000 as shown in Figure 2-8. The RS-485 port on
the FP-1001 must be wired in 4-wire, full duplex mode when connected
to the RS-485 repeater port.
GND NC RX TX
NC
RTS
NC
DSR
NC
54321
9876
NC = Not Connected
GND = Ground
RX = Recieve
TX = Transmit
RTS = Request to Send
DSR = Data Set Ready
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