National Instruments FIELDPOINT FP-DO-403 Manuale utente

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-403

16-Channel, 5 to 30 V Sinking Discrete

Output Module

These operating instructions describe the installation, features, and

characteristics of the FP-DO-403. For details on configuring and

accessing the FP-DO-403 over a network, refer to the user manual

for the particular FieldPoint network module you are using with

the FP-DO-403.

Features

The FP-DO-403 is a FieldPoint discrete output module with the

following features:

• 16 discrete output channels

• Sinking outputs supply 2 A per channel, 16 A2per module

• 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-403 mounts on a FieldPoint terminal base (FP-TB-xx)

unit. The hot plug and play operation of the FP-DO-403 allows you

to install it onto a powered terminal base without disturbing the

operation of other modules or terminal bases. The FP-DO-403

receives operating power from the terminal base.

FP-DO-403 2 www.natinst.com

To install the FP-DO-403, refer to Figure 1 and follow these steps:

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

module) or position 6 (used for the FP-DO-403 module).

2. Align the FP-DO-403 alignment slots with the guide rails on

the terminal base.

3. Press firmly to seat the FP-DO-403 on the terminal base. The

terminal base latch locks the FP-DO-403 into place when it is

firmly seated.

Figure 1. Module Installation Diagram

Field Wiring

The terminal base provides connections for each of the sixteen

output channels and an external supply to power field devices.

Although the external supply is not needed for the internal

operation of the FP-DO-403, the outputs sink 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-403 is

more than 5 A, route the external supply to the Vsup and COM

terminals of individual channels. Otherwise, the external supply

may simply be connected to the V and 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-403 consist of optically-

isolated sinking outputs. In the ON state, a transistor is turned on

between the output (Vout) terminal and the external supply (the C

and COM terminals). In the OFF state, this transistor is turned off,

allowing only a small leakage current to flow. Choose the

Table 1. Terminal Assignments

Channel

Terminal Numbers

Channel

Terminal Numbers

Vout Vsup COM Vout Vsup COM

0 1 17 18 8 9 25 26

1 2 17 18 9 10 25 26

2 3 19 20 10 11 27 28

3 4 19 20 11 12 27 28

4 5 21 22 12 13 29 30

5 6 21 22 13 14 29 30

6 7 23 24 14 15 31 32

7 8 23 24 15 16 31 32

a. Total Current Less

Than 6 Amps b. Total Current Greater

Than 6 Amps

CV Vsup

–

Load

Vout

Load

Vsup

Vout

–

Vout Load

Vout

Vsup

COM

Load

Vsup

FP-DO-403 4 www.natinst.com

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

2 A, and the total current supplied by all channels at any one time

is no more than 16 A2.

Use the following formula to ensure the total current per module is

not exceeded. Square the current of each channel and add them all

together. The result must be equal to or less than 16 A2. For

example, three channels with 2 A and four channels with

1 A ≤ 16 A2would be as follows: (2A)2+(2A)2+ (2A)2+ (1A)2+

(1A)2+ (1A)2+ (1A)2≤ 16 A2.

The outputs must not be short circuited to the potential of the V or

Vsup terminals (the positive voltage of the external supply). Such a

short circuit would cause many amps of current to flow through an

output and would damage the output. Check all wiring carefully

before applying power.

In the ON state, there is an effective resistance of 0.12 Ωbetween

the output (Vout) and the supply voltage (the C and COM

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 4.88 V: [5 V – (1 A x 0.12 Ω) = 4.88 V].

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

circuit.

Figure 3. Discrete Output Circuit

Vsup

COM

Vout

Optical

Isolation

Load

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-403 informs the network module of its presence. When

the network module recognizes the FP-DO-403, it sends initial

configuration information to the FP-DO-403. After receiving this

initial information, the green READY indicator turns on and the

FP-DO-403 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.

Isolation and Safety Guidelines

Caution Read the following information before

attempting to connect any circuits which may contain

hazardous voltages to the FP-DO-403.

This section describes the isolation of the FP-DO-403 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-403 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

FP-DO-403 6 www.natinst.com

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-403 is) for such an application.

Even when a product like the FP-DO-403 is used in applications

with hazardous potentials, follow these guidelines to ensure a safe

total system.

•Thesafety isolation of the FP-DO-403 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-403 is certified as double insulated

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

FP-DO-403 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..........................16

Output type .......................................Sinking

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

Output impedance.............................0.12 Ω

(0.12 volts drop at 1 A)

Maximum output current..................2 A per channel,

16 A2per module

Note Sum of output currents squared must be less than

16 A2. (For example, 1 A on 16 channels or 2 A on four

channels).

Maximum OFF state leakage............50 µA

Output delay times............................50 µs

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

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

1010 as double insulated

Physical

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

READYindicators,16green

output state indicators

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

Power Requirements

Power from network module ............600 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-403.

Dimensions are given in inches [millimeters].

Figure 5. Mechanical Dimensions

4.31

[109.5]

3.60 [91.44]

4.22 [107.19]

Indice

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