Chapter 2
Hardware Installation and Configuration
2-8
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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 might 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.
An alternative method is to connect the FP-1001 directly to your host
computer, if your host computer provides an RS-485 interface. Contact
National Instruments for information about available RS-485 hardware.
You can connect up to 25 FP-1001 network modules to each RS-485 port
on the host computer. This network configuration method is shown in
Figure 2-10.
GND
NC
RX
TX
NC
RTS
NC
DSR
NC
5
4
3
2
1
9
8
7
6
NC = Not Connected
GND = Ground
RX = Recieve
TX = Transmit
RTS = Request to Send
DSR = Data Set Ready
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