National Instruments FieldPoint FP-1000 Manual de usuario
FieldPoint
™
is a trademark of National Instruments Corporation. Product and company names are
trademarks or trade names of their respective companies.
321697A-01
©
Copyright 1997 National Instruments Corp. All rights reserved. July 1997
FP-1000
FieldPoint RS-232 Network Module
Highlights
• RS-232 interface to host computer
• Built-in isolated RS-485 repeater to connect to FP-1001
network modules
• Compatible with industry standard Optomux protocol
• Runs on 11 to 30 VDC power
• Built-in high efficiency power supply powers I/O modules
• -40° to +70° C operation
Overview
The FP-1000 is a network module for the FieldPoint system. It
provides connection to an RS-232 network using a simple ASCII
protocol. In addition, it has an isolated RS-485 repeater built in to
transparently add up to 24 FP-1001 network modules to the same
host computer serial port.
Thisdocumentprovidesaquickguidetoinstallingandconfiguring
the FP-1000 network module. For more detailed information on
using the network module, refer to the FP-1000/1001 user manual.
For information on the ASCII protocol used by the network
module, refer to the FP-1000/1001 programmer reference manual.
FP1000.fm Page 1 Thursday, July 31, 1997 8:49 AM
2
DIN Rail Mounting
NOTE: Terminal bases must be connected to the network
module before applying power to the module. Do not connect
or disconnect terminal bases while power is applied to the
network module.
The FP-1000 has a simple rail clip for mounting reliably onto a
standard 35 mm DIN rail. To install the FP-1000 to the DIN rail,
follow these steps:
1. With a flat bladed screwdriver, open the rail clip to the
unlocked position as shown in Figure 1.
Figure 1. DIN Rail Clip
2. Hook the lip on the rear of the FP-1000 onto the top of a 35 mm
DIN rail and press the FP-1000 down onto the DIN rail as
shown in Figure 2.
Figure 2. Installing the Network Module onto a DIN Rail
3. Slide the FP-1000 to the desired position along the DIN rail.
After the FP-1000 is in position, lock it to the DIN rail by
pushing the rail clip in.
Rail Clip LockedRail Clip Unlocked
Press
DIN Rail
C
over
Local Bus
Connector
FP1000.fm Page 2 Thursday, July 31, 1997 8:49 AM
3
4. Add terminal bases to the DIN rail with their local bus
connectors firmly mated to the FP-1000 local bus connector.
The FP-1000 is shipped with a protective cover over the local
bus connector. Remove this protective cover, and place it over
the local bus connector of the last terminal base in the stack.
Figure 3 shows an installed FP-1000 network module.
Figure 3. Installed Network Module
Network Connection
Connect the FP-1000 to a host computer using the 9-position DSub
RS-232 connector on the FP-1000. Connect the RS-232 port of the
FP-1000 to the RS-232 port on your computer using a male-to-
female “straight-through” cable. Do not use a “null modem” cable
(usually female-to-female). For reference, the pinout of the
RS-232 connector on the FP-1000 is shown in Figure 4.
Protective
Cover
Local Bus Connectors
Firmly Mated
Rail Snap
Locked DIN
Rail
FP1000.fm Page 3 Thursday, July 31, 1997 8:49 AM
4
Figure 4. RS-232 Connector Pinout
Up to 24 additional FP-1001 network modules can be connected to
this FP-1000 module by using the built in RS-485 repeater. This
repeater makes the RS-485 port of the FP-1000 appear to the
additionalFP-1001modules as if it were an RS-485 portofthe host
computer. The pinout of the RS-485 connector is shown in
Figure 5.
Figure 5. RS-485 Connector Pinout
TheTX+oftheFP-1000mustbeconnected to the RX+ofallof the
FP-1001 modules, and the TX- of the FP-1000 must be connected
to the RX- of all of the FP-1001 modules. This pair of connections
provides communication from the host computer, through the
FP-1000, to the FP-1001 modules.
TheRX+ of the FP-1000mustbeconnected to the TX+ofallof the
FP-1001 modules, and the RX- of the FP-1000 must be connected
to the TX- of all of the FP-1001 modules. This pair of connections
provides communication to the host computer, through the
FP-1000, from the FP-1001 modules.
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
Legend:
RX–
RX+
TX–
TX+
GND
12345
FP1000.fm Page 4 Thursday, July 31, 1997 8:49 AM
5
These connections are shown in Figure 6.
Figure 6. Typical Signal Connections with One FP-1000 Connected to
Multiple FP-1001 Network Modules
Figure 6 also shows the use of 120 Ohm termination resistors. An
RS-485network must beterminatedat each endofthenetwork, but
not anywhere else. Termination resistors should be installed
between the RX pair and between the TX pair of the FP-1000
RS-485 port. Termination resistors should also be installed on the
RS-485 port of the last FP-1001 on the network. A pair of
terminating resistors are provided with each network module. To
install them, twist the resistor leads with the RS-485 signal wires
and insert them into the RS-485 port terminals.
Setting the Address and Baud Rate
Figure 7 shows the 8-position switch on the FP-1000 network
module. Switches 1-5 set the network address, and switches 6-8 set
the baud rate. Every network module connected to one serial port
of the host computer must be given a unique address, however
moduleson different serialportsmay have thesameaddress.Every
module on one serial port of the host computer must have the same
baud rate.
Switches 1-5 set the network address of the FP-1000. The
addresses of the terminal bases connected to the network module
are automatically configured to be sequentially higher than the
network module’s address. For example, if the network module is
set to address 20, the I/O module in the terminal base immediately
connected the network module is at address 21, the next I/O
To Host
Computer's RS-232
Receive Input
From Host
Computer's RS-232
Transmit Output
Ground
FP-1001 FP-1001 FP-1000
120Ω
TX
RX
TX RX
RX TX
120Ω
120Ω
120Ω
Connect the TX outputs of the FP-1001 to the RX inputs of the FP-1000,
and the RX inputs of the FP-1001 to the TX outputs of the FP-1000.
FP1000.fm Page 5 Thursday, July 31, 1997 8:49 AM
6
module is at address 22, and so on. A terminal base is assigned a
network address whether an I/O module is inserted into it or not.
Figure 7. Address and Baud Rate Switch
Table 1 shows the possible switch positions and the corresponding
address of the FP-1000.
Table 1. Network Address Switch Settings
Switch
Positions 1-5 Network Module
Address (Decimal) Switch
Positions 1-5 Network Module
Address (Decimal)
0130
10 140
20 150
30 160
40 170
50 180
60 190
12345678
12345678
Address Baud
Rate
Switch Cover
(Removed)
12345678
12345678
12345678
12345678
12345678
12345678
12345678 12345678
12345678 12345678
12345678
12345678
12345678
12345678
FP1000.fm Page 6 Thursday, July 31, 1997 8:49 AM
7
Switches 6-8 set the baud rate of the FP-1000. Table 2 shows the
switch positions and the corresponding network baud rates.
70 200
80 210
90 220
100 230
110 240
120 Other Settings Not Allowed
Table 2. Baud Rate Switch Settings
Switch
Positions 6-8 Network Module
Baud Rate Switch
Positions 6-8 Network Module
Baud Rate
300 19200
1200 38400
2400 57600
9600 115200
Table 1. Network Address Switch Settings (Continued)
Switch
Positions 1-5 Network Module
Address (Decimal) Switch
Positions 1-5 Network Module
Address (Decimal)
12345678
12345678
12345678 12345678
12345678
12345678
12345678
12345678
12345678
12345678
12345678
12345678
12345678
12345678
12345678
12345678
12345678
12345678 12345678
FP1000.fm Page 7 Thursday, July 31, 1997 8:49 AM
8
Powering the FP-1000
NOTE: Terminal bases must be connected to the FP-1000,
and the baud rate switch must be set, before power is applied to
the FP-1000.
An 11-30 VDC power supply is required by each FieldPoint stack.
The network module filters and regulates this supplied power and
provides power for all the I/O modules in the stack. Therefore you
need not provide power separately to each FieldPoint I/O module
in the stack. If your field I/O device needs to be powered
separately, you can use the terminals provided on each terminal
base for such power supply connections.
The power connector is a 4-pin screw terminal connector whose
pinout is shown in Figure 8.
Figure 8. FP-1000 and FP-1001 Power Connector Pinout
The two terminals labeled V are internally connected on the
networkmodule, as are the two terminalslabeled C. Power must be
applied to one V and C pair for operation of the FieldPoint system.
If you want to power your field I/O devices from the same power
supply, the second V and C pair provides a convenient means of
connecting power to the V and C terminals of a terminal base.
Figure 8 shows this optional connection.
+
–
V
VV
CC
C
To Adjacent Terminal Base
(Optional Connection)
11-30 VDC
FP1000.fm Page 8 Thursday, July 31, 1997 8:49 AM
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Specifications
Network ports ...................................1 RS-232 port, 1 RS-485
repeater port
Baud Rates........................................300, 1200, 2400, 9600,
19200, 38400, 57600,
115200 (switch selectable)
Communication parameters..............1 start bit, 8 data bits,
1 stop bit, No parity
RS-485 isolation ...............................2500 Vrms breakdown,
250 Vrms operational
Power Consumption..........................1 W + 1.15 * ∑(I/O module
power requirements)
Operating Temperature.....................-40° C to +70° C
Storage Temperature.........................-55° C to +100° C
Relative Humidity.............................5% to 90% non-condensing
Weight...............................................250 g (8.7 oz.)
CE Mark Compliance
This product meets applicable EU directive(s) as follows:
Safety isolation ................................EN 61010 (double insulation
for 250 Vrms working
isolation, installation
category II)
EMC Directive
Immunity....................................EN 50082-1:1994
Emissions ..................................EN 55011:1991 Group I
Class A at 10 meters
FP1000.fm Page 9 Thursday, July 31, 1997 8:49 AM
10
Mechanical Dimensions
Figure 9 shows the mechanical dimensions of the FP-1000.
Figure 9. Mechanical Dimensions
4.31
[109.5]
3.58 [90.9]
4.19 [106.4]
FP1000.fm Page 10 Thursday, July 31, 1997 8:49 AM
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