National Instruments FieldPoint User manual

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322174C-01 ©1998–2002 National Instruments Corp. All rights reserved. February 2002
INSTALLATION GUIDE
FIELDPOINT BUS EXTENDER CABLE
If you have space constraints, you can use the FieldPoint Bus Extender Cable to mount a
FieldPoint bank in two or three rows.
Caution You should not use more than two FieldPoint Bus Extender Cables per
FieldPoint bank.
Caution Disconnect power from the network module and terminal bases before
you install the Bus Extender Cable. Do not disconnect a Bus Extender Cable
while the FieldPoint bank is powered on.
Choosing a Configuration
Before you begin installing the Bus Extender Cable, choose a configuration for the
FieldPoint bank. With the Bus Extender Cable, you can mount rows of modules with
terminal blocks together (bottom-to-bottom) or with terminal blocks apart (top-to-top).
Mounting modules with terminal blocks together lets you use one wiring conduit for
two rows of modules and is the recommended method due to cooling considerations.
You should install higher-powered I/O modules on top in this configuration to further help
with cooling. Figure 1 shows configuration examples with two rows. You can use up to
three rows.
Figure 1. FieldPoint Bank Configuration Options
™
Terminal Blocks Together Terminal Blocks Apart
network module I/O modules more I/O modules
more I/O modules network module I/O modules
(Recommended due to better cooling)

FieldPoint Bus Extender Cable 2 ni.com
Figure 2 shows the dimensions for mounting the terminal bases with the terminal blocks
together. Dimensions are given in inches [millimeters].
Figure 2. Mounting with Terminal Blocks Together
6.70
[170]
max
14.0
[355]
max
1.11
[28.2]
1.76
[44.6]
1.23
[31.2]
1.23
[31.2]
1.05
[26.7]
female end
male end
Cable
Mounting
Holes
Other
Terminal
Bases
(if installed)
Other
Terminal
Bases
(if installed)
and network
module
0.59
[14.9]

©National Instruments Corporation 3 FieldPoint Bus Extender Cable
Figure 3 shows the dimensions for mounting the terminal bases with the terminal blocks
apart. Dimensions are given in inches [millimeters].
Figure 3. Mounting with Terminal Blocks Apart
Installing the Bus Extender Cable
You can install the FieldPoint bank on a DIN rail or on a panel. Installing the bank on a wall
or a panel is the more secure installation option and may prevent accidental disconnection.
Installing the Bus Extender Cable on a DIN Rail
Follow these steps to install the Bus Extender Cable on a DIN rail:
1. Install the FieldPoint bank on the DIN rail. Refer to the Quick Start Guide for the
network module you are using.
2. Make sure power is disconnected from the FieldPoint bank.
2.00
[50.8]
max
9.30
[236]
max
1.11
[28.2]
1.76
[44.6]
1.23
[31.2]
1.23
[31.2]
1.05
[26.7]
female
end
male
end
Cable
Mounting
Holes
Other
Terminal
Bases
(if installed)
and network
module
Other
Terminal
Bases
(if installed)
0.59
[14.9]

FieldPoint Bus Extender Cable 4 ni.com
3. Plug in the Bus Extender Cable. The female end of the cable plugs into the terminal
base closer to the network module. The male end of the cable plugs into the terminal
base farther from the network module. The cables are keyed to prevent improper
installation.
If you have the optional DIN rail mounting kit, part number 777609-02, follow steps 4–5.
If you do not have the optional DIN rail mounting kit, go to step 6.
4. Place the mounting bracket on the DIN rail and slide it under the mounting tab of the
Bus Extender Cable.
5. Drive the long screw that came with the DIN rail mounting kit through the mounting
tab of the Bus Extender Cable and the mounting bracket. Drive the short screw that
came with the DIN rail mounting kit through the other end of the mounting bracket,
and use the split lock washer. The maximum tightening torque for each screw is
0.95 N-m or 8.4 lb-in.
The Bus Extender Cable installed with the mounting bracket should appear as shown
in Figure 4.
Figure 4. Installing the Bus Extender Cable on a DIN Rail with a Mounting Bracket
1 Long screw 2 Mounting bracket 3 Short screw with split lock washer
1
2
3

©National Instruments Corporation 5 FieldPoint Bus Extender Cable
6. If you are not using a mounting bracket, and you intend to mount the DIN rail to a
panel, use the long metal spacer that came with the Bus Extender Cable. Drill pilot
holes for the cable mounting hole according to the dimensions in Figure 2 or 3. Then
place the long spacer under the mounting tab of the Bus Extender Cable and drive a
screw through them as shown in Figure 5.
Figure 5. Installing the Bus Extender Cable on a DIN Rail with a Metal Spacer
Installing the Bus Extender Cable on a Panel
Follow these steps to install the Bus Extender Cable on a panel:
1. Drill pilot holes into the panel according to the dimensions in Figure 2 or 3.
2. Install the FieldPoint bank on the panel. Refer to the Quick Start Guide for the network
module you are using.
3. Make sure power is disconnected from the FieldPoint bank.
4. Plug in the Bus Extender Cable. The female end of the cable plugs into the terminal
base closer to the network module. The male end of the cable plugs into the terminal
base farther from the network module. The cables are keyed to prevent improper
installation.
1 Long spacer
1

FieldPoint Bus Extender Cable 6 ni.com
5. Place the short spacer under the mounting tab of the Bus Extender Cable and drive a
screw through them into the pilot holes you drilled on the panel.
The Bus Extender Cable installed on a panel should appear as shown in Figure 6.
Figure 6. Installing the Bus Extender Cable on a Panel
Powering Up the FieldPoint Bank
You can now connect power to the FieldPoint bank. Remember to disconnect power first,
if you need to remove the Bus Extender Cable at a later time.
1 Short spacer
1