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Chapter 2 Installation and Configuration
FieldPoint FP-1000/FP-1001 User Manual 2-6
©
National Instruments Corporation
Both serial interfaces are self-configured to use the following
parameters:
1 Start Bit, 8 Data Bits, 1 Stop Bit, No Parity
The supported baud rates are 300, 1200, 2400, 9600, 19200, 38400,
57600, and 115200. Refer to the Configuring the Network Module
section for information about setting the baud rate for your modules.
Host computer RS-232 ports and RS-485 interface boards provide FIFO
buffers for transmit and receive that help to decrease the overhead on
host computers. National Instruments recommends that you enable
these FIFO buffers in your host computer or RS-485 interface board for
best performance.
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 2-7.
Figure 2-7.
RS-232 Connector Pinout for the FP-1000
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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