National Instruments FieldPoint FP-20 Series Bedienungsanleitung

QUICK START GUIDE

FieldPoint FP-20

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.

What You Need to Get Set Up

• FP-20

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.

FP-20xx Quick Start Guide 2 ni.com

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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.

National Instruments Corporation 3 FP-20xx Quick Start Guide

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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.

National Instruments Corporation 5 FP-20xx Quick Start Guide

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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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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

National Instruments Corporation 7 FP-20xx Quick Start Guide

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Connecting the FP-20

to the Network

Connect the FP-20

to an Ethernet network by connecting the RJ-45 Ethernet

port of the FP-20

to an Ethernet hub using a standard Category 5 Ethernet

cable.

Optionally, you can connect an FP-20

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.

FP-20xx Quick Start Guide 8 ni.com

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

National Instruments Corporation 9 FP-20xx Quick Start Guide

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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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