National Instruments FieldPoint FP-DO-410 Bedienungsanleitung

FieldPoint ™is a trademark of National Instruments Corporation. Product and company names

mentioned herein are trademarks or trade names of their respective companies.

OPERATING INSTRUCTIONS

FP-DO-410

8-Channel, 5 to 30 V Protected Discrete

Output Module

These operating instructions describe the installation, features, and

characteristics of the FP-DO-410. For details on configuring and

accessing the FP-DO-410 over a network, refer to the user manual

for the particular FieldPoint network module you are using with

the FP-DO-410.

Features

The FP-DO-410 is a FieldPoint discrete output module with the

following features:

• Eight electronically-fused discrete output channels with status

indicators

• Sourcing outputs supply 1 A per channel

• Compatible with voltages from 5 to 30 VDC

• On/Off LED indicators

• Hot plug and play operation

• 3,000 V input to output isolation

• Double insulated for 250 V safe working voltage

• –40 to +70 °C operation

Installation

The FP-DO-410 mounts on a FieldPoint terminal base (FP-TB-xx)

unit. The hot plug and play operation of the FP-DO-410 allows you

to install it onto a powered terminal base without disturbing the

operation of other modules or terminal bases. The FP-DO-410

receives operating power from the terminal base.

FP-DO-410 2 www.natinst.com

To install the FP-DO-410, refer to Figure 1 and follow these steps:

1. Slide the terminal base key to either position X (used for any

module) or position 4 (used for the FP-DO-410 module).

2. Align the FP-DO-410 alignment slots with the guide rails on

the terminal base.

3. Press firmly to seat the FP-DO-410 on the terminal base. The

terminal base latch locks the FP-DO-410 into place when it is

firmly seated.

Figure 1. Module Installation Diagram

Field Wiring

Theterminalbaseprovidesconnectionsforeach of the eightoutput

channels and an external supply to power field devices. Although

the external supply is not needed for the internal operation of the

FP-DO-410, the outputs source current from this external supply.

You may connect an external supply to power field devices by

connecting to the V and C terminals of the terminal base. Each

channel has one output terminal, Vout; a common terminal, COM

(internally connected to the C terminal); and a supply terminal,

Vsup (internally connected to the V terminal). If the total current

supplied by the channels of the FP-DO-410 is more than 5 A, route

the external supply to the Vsup terminals of individual channels.

Otherwise, the external supply may simply be connected to the

Vand C terminals. Figures 2a and 2b show examples of basic

wiring connections.

Alignment

Slot

Key

Latch

Guide Rails

Terminal BaseI/O Module

Figure 2. Basic Field Connections (Two Channels Shown)

Table 1 lists the terminal assignments for the signals of each

channel.

Discrete Output Circuit

The discrete outputs of the FP-DO-410 consist of optically-

isolated sourcing outputs with overcurrent protection circuitry. In

the ON state, a transistor is turned on between the positive external

supply voltage (the V and Vsup terminals) and the output (Vout)

terminal. In the OFF state, this transistor is turned off, allowing

Table 1. Terminal Assignments

Channel

Terminal Numbers

Vout Vsup COM

0 1 17 2, 18

1 3 19 4, 20

2 5 21 6, 22

3 7 23 8, 24

4 9 25 10, 26

511 27 12, 28

613 29 14, 30

715 31 16, 32

CV Vout

–

COM

a. Total Current Less

Than 5 Amps

Load

Vout

COM Load

Vout

COM

b. Total Current Greater

Than 5 Amps

Load

Vout

Vsup

COM

Load

FP-DO-410 4 www.natinst.com

only a small leakage current to flow. Choose the impedance of the

loads driven by the output channels so that the current supplied

by any one channel in the ON state is no more than 1 A, and the

total current supplied by all channels at any one time is no more

than 8 A.

In the ON state, there is an effective resistance of 0.3 Ωbetween

the output (Vout) and the supply voltage (the V and Vsup terminals).

This resistance causes a voltage drop between the external supply

voltage and the output voltage. For example, if the external supply

voltage is 5 V and the output current is 1 A, the output voltage is

4.7 V: [5 V – (1 A x 0.3 Ω) = 4.7 V].

Figure 3 shows the diagram of one channel’s discrete output

circuit.

Figure 3. Discrete Output Circuit

Overcurrent Protection

Detect an Overcurrent Condition

Each channel has an overcurrent protection circuit that monitors

the amount of current it sources to the Vout terminal. If this current

exceeds a safe level, which is always at least 1 A, the output

automatically becomes deactivated. If the protection circuitry

disables an output that would otherwise be in the ON state, the

output state indicator for that channel remains lit, but the output

transistoristurned off.Thisconditionalso turns on theadjacent red

overcurrent state indicator and returns an overcurrent status to the

networkmodule.To preventfalsetriggering,higherinrush currents

that exist for only a short time do not trigger the protection

circuitry.

COM

Vout

Vsup

Optical

Isolation

Load

Reset the Overcurrent Protection Circuit

There are several ways to reset the overcurrent protection circuit,

but first correct the problem that caused the overcurrent protection

circuit to trip. Perform one of the following tasks to reset the

overcurrent protection circuit:

• Remove the load from the FP-DO-410 (theoutput remains on).

• Switch the output to the OFF state.

• Disconnect field power from the module.

• Remove the FP-DO-410 from its terminal base.

• Turn off the network module.

Status Indicators

Figure 4 shows the module label and status indicators. You can

remove the insertable label to see wiring diagrams for the output

channels.

Figure 4. Status Indicators and Module Label

After the module has been inserted into a terminal base (and power

is applied), the green POWER indicator turns on and the

FP-DO-410 informs the network module of its presence. When

the network module recognizes the FP-DO-410, it sends initial

configuration information to the FP-DO-410. After receiving this

initial information, the green READY indicator turns on and the

FP-DO-410 is in its normal operating mode. In addition to the

green POWER and READY indicators, each channel has a

numbered, green, output state indicator which lights when the

channel is in the ON state and a red overcurrent state indicator,

which lights when the channel is in overcurrent protection. For

more information, refer to the section on Overcurrent Protection.

FP-DO-410 6 www.natinst.com

Isolation and Safety Guidelines

Caution Read the following information before

attempting to connect any circuits which may contain

hazardous voltages to the FP-DO-410.

This section describes the isolation of the FP-DO-410 and its

compliance with international safety standards. The outputs are

isolated from the backplane provided by the terminal base with an

optical isolation barrier designed and tested to provide protection

against fault voltages of up to 3000 Vrms. In addition, the

FP-DO-410 provides double insulation (compliant to UL and

IEC safety standards) for working common mode voltages of

250 Vrms. Safety standards (such as those published by UL and

IEC) require the use of double insulation between hazardous

voltages and any human-accessible parts or circuits. You should

never attempt to use any isolation product between human

accessible parts (such as DIN rails or monitoring stations) and

circuits which may be at hazardous potentials under normal

conditions, unless the product is specifically designed (as the

FP-DO-410 is) for such an application.

Even when a product like the FP-DO-410 is used in applications

with hazardous potentials, follow these guidelines to ensure a safe

total system.

• The safety isolation of the FP-DO-410 is from input to output,

not between channels on the same module. If any of the

channels on a module are wired at a hazardous potential,

ensure that all other devices or circuits connected to that

module are properly insulated from human contact.

•Donot share the external supply voltages (V and C on the

terminal base) with other devices (including other FieldPoint

devices) unless those devices are also isolated from human

contact.

• As with any hazardous voltage wiring, ensure that all wiring

and connections meet with applicable electrical codes or

common sense practices. Mount terminal bases in an area,

position, or cabinet that prevents accidental or unauthorized

access to wiring with hazardous voltages.

• The isolation of the FP-DO-410 is certified as double insulated

for normal operating voltages of 250 Vrms. Do not use the

FP-DO-410 as the sole isolating barrier between human

contact and working voltages of more than 250 Vrms.

Specifications

These specifications are typical for the range –40 to +70 °C unless

otherwise noted.

Input Characteristics

Number of channels..........................8

Output type .......................................Sourcing

Voltage range ....................................5 to 30 VDC

Output impedance.............................0.3 Ω

(0.3 volts drop at 1 A)

Maximum output current..................1 A perchannel, with built-in

overcurrent protection

circuitry

Output delay times

Turn ON......................................20 µs

Turn OFF....................................50 µs

Maximum leakage current

OFF state ....................................50 µA

Overcurrent condition.................1 mA

Isolation ............................................3,000 Vrms

Safety isolation, working voltage .....250 Vrms, designed per IEC

1010 as double insulated

Physical

Indicators ..........................................Green POWER and

READY indicators, 8 green

output state indicators, 8 red

overcurrent state indicators

Weight...............................................140 g (4.8 oz.)

Power Requirements

Power from network module ............400 mW

Environment

Operating temperature......................–40 to +70 °C

Storage temperature..........................–55 to +100 °C

Relative humidity..............................5% to 90% non-condensing

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

Mechanical Dimensions

Figure 5 shows the mechanical dimensions of the FP-DO-410

installed onto a terminal base. Dimensions are given in inches

[millimeters].

Figure 5. Mechanical Dimensions

4.31

[109.5]

3.60 [91.44]

4.22 [107.19]

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