National Instruments FieldPoint FP-20 Series User manual

QUICK START GUIDE
FieldPoint FP-20 xx
Selecting an Environment for the FieldPoint System
NI FieldPoint is designed for static installations. Static installations are
installations that do not move and are not subject to shock and vibration.
NI recommends Compact FieldPoint for mobile systems and for locations that
are subject to shock and vibration.
The FieldPoint system should be mounted inside an instrumentation cabinet
such as the FP-ENC1. NI offers two versions of the FP-ENC1, one with a solid
metal door and one with a polycarbonate window. Both versions include a DIN
rail for mounting the FieldPoint system inside the cabinet.
1
What You Need to Get Set Up
• FP-20 xx LabVIEW RT controller
• 35 mm DIN rail
• Two DIN rail locks (included)
• Terminal base(s)
• I/O module(s)
• 11–30 VDC power supply
• Accessories: Ethernet cable,
flathead screwdriver
• Ferrite clip for Ethernet cable,
NI part number 711856-01
• PC running Windows
• National Instruments FieldPoint
Software CD
• LabVIEW RT
™
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The best way to mount a FieldPoint system is on a single 35 mm DIN rail inside
an instrumentation cabinet. Do not mount the FieldPoint system on a door or
panel. Doors can contort and bend DIN rails, causing disconnections. Panel
mounting can cause FieldPoint modules not to make solid contact with each
other.
Mounting the FieldPoint System on a DIN Rail
Mounting the DIN Rail on a Solid Support
Use screws to mount the DIN rail securely to a solid support such as the inside
of an instrumentation cabinet. Place the screws 100 mm (4 in.) apart.
Note Do not use spliced DIN rails. Use only a single DIN rail.
Installing the Network Module
A. Unlock rail clip.
B. Hook lip on back of module
onto top of DIN rail, press
down, and snap into place.
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C. Slide module into position and lock rail clip.
Installing the Terminal Bases
Caution Connect terminal bases 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.
A. Unlock rail clip.
B. Press base onto rail.
C. Slide base into position and
lock rail clip. Be careful not
to bend any pins.
D. Repeat for each terminal
base, up to nine for each
network module in most
cases. Make sure there are
no gaps between terminal
bases.
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Note If you need more than one length of DIN rail, use up to two
FieldPoint Bus Extender cables instead of splicing DIN rails together.
You can order FieldPoint Bus Extender cables from NI.
E. You must install DIN rail locks at each end of the bank to ensure reliable
connections between terminal bases and network module. Two rail locks
are included with each network module. Place protective cover on the bus
connector of the last terminal base.
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Installing the I/O Modules
It does not matter where you install each I/O module, except in the following
cases:
• If you plan to cascade power between any I/O modules using the V and C
terminals, group those modules together. Refer to the FP-2000/2010/2015
User Manual for more information about cascading power.
Caution Cascading power defeats isolation.
• For more accurate measurements, place thermocouple modules away from
heat sources, including network modules and relay modules, and mount
thermocouple modules on FP-TB-3 terminal bases.
A. Align slots on module with guide rails on base, and press module onto base
until terminal base latch locks module in place.
B. Repeat for each I/O module.
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Grounding and Shielding the FieldPoint System
Protecting the FieldPoint System from Damage
In order to comply with EMC specifications, the FieldPoint system must be
mounted inside a metal enclosure such as the FP-ENC1. For maximum protection
from electromagnetic interference and electrostatic discharge, ground the
enclosure as shown.
Protecting Signals from
Interference
There are three main types
of interference that affect
measurements:
electrostatic induction,
magnetic induction,
and transients. The area in which your signal wires are located as well as the
types of wires used to connect device to the FieldPoint system determine how
much these types of interference affect signals.
Electrostatic induction comes from electrical fields radiated by voltage sources
such as power lines. Electrical fields near signal wires can add noise to signals.
You can reduce this type of interference by using signal wire with a foil shield
and grounding the shield at the signal source end of the wire. Be sure not to
1 Ground braid
2 Grounding bolts
on enclosure
3 DIN rail inside
enclosure
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1
3
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ground the shield at any other point because it is not thick enough to withstand
current running through it.
Magnetic induction comes from magnetic fields surrounding the flow of current.
The fields produce current in the signal wires which generates noise. You can
reduce the amount of magnetic induction by using twisted-pair wire. The more
twists per length of wire, the more the magnetic interference is reduced.
Transients, also called voltage spikes, can be induced on signal wires by
sources such as lightning strikes. If your signal wires are in an environment
susceptible to lightning strikes or other sources of transients, run the wires
through a metal conduit grounded in several places or through a thick shield
grounded in several places.
Note A foil shield is not thick enough to protect against transients and
should be grounded only at one end.
1 Twisted pair
2 Foil shield
3 Conduit
4 Grounded
in several
locations
5 Grounded
at one end
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4
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Connecting the FP-20 xx to the Network
Connect the FP-20 xx to an Ethernet network by connecting the RJ-45 Ethernet
port of the FP-20 xx to an Ethernet hub using a standard Category 5 Ethernet
cable.
Optionally, you can connect an FP-20 xx directly to a computer using an Ethernet
crossover cable.
Do not use a cable longer than 100 m. If you are using a 100 Mbps Ethernet,
National Instruments recommends using a Category 5 shielded twisted-pair
cable. If you need to build your own cable, refer to the FP-20xx User Manual
specifications section for cabling details.
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Crossover Cable
Straight-Through
UTP Cable
Straight-Through
UTP Cable
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Install a ferrite clip, NI part number 711856-01, on the Ethernet cable, 10 in. or
less from the FP-20 xx .
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Wiring Power to the FieldPoint System
A. Use an 11–30 VDC, 15 W minimum power supply such as the NI PS-4 or
PS-5.
B. Install a ferrite on the power supply leads, less than 10 in. from the ends of
the leads, as shown.
C. Install a tie wrap to secure the ferrite.
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