National Instruments FIELDPOINT cFP-DO-403 Manuale utente

FIELDPOINT™OPERATING INSTRUCTIONS

AND SPECIFICATIONS

FP-DO-403 and cFP-DO-403

16-Channel, 5 to 30 V Sinking Digital Output Module

These operating instructions describe how to install and use the

National Instruments FP-DO-403 and cFP-DO-403 digital output

modules, referred to inclusively as the [c]FP-DO-403. For

information about configuring and accessing the [c]FP-DO-403

over a network, refer to the user manual for the FieldPoint network

module you are using.

Features

The [c]FP-DO-403 is a FieldPoint digital output module with the

following features:

• 16 sinking digital output channels

• Outputs that sink 2 A per channel, 16 A2per module

• Compatible with voltages from 5 to 30 VDC

• 250 Vrms CAT II continuous channel-to-ground isolation,

verified by 2,300 Vrms, 5 s dielectric withstand test

• –40 to 70 °C operation

• ON/OFF LED indicators

• Hot swappable

Installing the FP-DO-403

The FP-DO-403 mounts on a FieldPoint terminal base (FP-TB-x),

which provides operating power to the module. Installing the

FP-DO-403 onto a powered terminal base does not disrupt the

operation of the bank.

To install the FP-DO-403, refer to Figure 1 and complete the

following 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.

[c]FP-DO-403 2 ni.com

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. When

the module is firmly seated, the terminal base latch locks it into

place.

Figure 1. Installing the FP-DO-403

Installing the cFP-DO-403

The cFP-DO-403 mounts on a Compact FieldPoint backplane

(cFP-BP-x), which provides operating power to the module.

Installing the cFP-DO-403 onto a powered backplane does not

disrupt the operation of the bank.

To install the cFP-DO-403, refer to Figure 2 and complete the

following steps:

1. Align the captive screws on the cFP-DO-403 with the screw

holes on the backplane. The alignment keys on the

cFP-DO-403 prevent backward insertion.

2. Press firmly to seat the cFP-DO-403 on the backplane.

3. Using a number 2 Phillips screwdriver with a shank of at least

64 mm (2.5 in.) length, tighten the captive screws to 1.1 N ⋅m

(10 lb ⋅in.) of torque. The nylon coating on the screws prevents

them from loosening.

1 I/O Module

2 Terminal Base

3 Alignment Slot

4Key

5 Latch

6 Guide Rails

Figure 2. Installing the cFP-DO-403

Wiring the [c]FP-DO-403

The FP-TB-xterminal base has connections for each FP-DO-403

output channel and for an external supply to power field devices.

The cFP-CB-xconnector block provides the same connections for

the cFP-DO-403.

Each channel has one output terminal, VOUT. The output channels

share eight VSUP terminals and eight COM terminals. All of the

channels are referenced to the COM terminals. The V and VSUP

terminals are all internally connected, as are the C and COM

terminals.

Use a 5–30 VDC external power supply for the output channels.

The power supply must provide enough current to power all of the

1 cFP I/O Module

2 Captive Screws

3 cFP Controller Module

4 Screw Holes

5 cFP Backplane

[c]FP-DO-403 4 ni.com

loads on the output channels, up to 2 A per channel.1Connect

the external power supply to multiple V and VSUP terminals and

to multiple C and COM terminals as needed to ensure that the

maximum current through any terminal is 2 A or less.

Install a 2 A maximum, fast-acting fuse (F2A 250V) between the

external power supply and the VSUP terminal on each channel.

Install a 2 A maximum, fast-acting fuse suitable for the load at the

VOUT terminal. Figure 3 shows fuses where appropriate.

Table 1 lists the terminal assignments for the signals associated

with each channel. Terminal assignments and wiring diagrams are

also listed on the side panel of the cFP-DO-403 and under the

slide-in card on the front of the FP-DO-403 module.

National Instruments recommends that you wire the external

power supply to multiple VSUP and COM terminals. Figure 3

shows how to connect two output channels to loads.

Wiring for Low-Current Applications

If your application requires 2 A or less combined current through

all channels of the [c]FP-DO-403, you can wire your application

as shown in Figure 3. Install a 2 A maximum, fast-acting fuse

(F2A 250V) between the external power supply and the V terminal

as shown.

1 Refer to the Digital Output Circuit and Specifications sections for the maximum

output current level on all channels.

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

Figure 3. Wiring for Low-Current Applications

Wiring for High-Current Applications

If your application requires more than 2 A combined current

through all channels of the [c]FP-DO-403, wire your application

as shown in Figure 4. Install a 2 A maximum, fast-acting fuse

(F2A 250V) in series with each load as shown.

Figure 4. Wiring for High-Current Applications

COM

VOUT

[c]FP-DO-403

Load –

5–30 VDC

External Power

Supply

VSUP

VOUT

2 A Max

User-Supplied

Fuse

Load

COM

VOUT

[c]FP-DO-403

Load

–

5–30 VDC

External Power

Supply

VSUP

VOUT

2 A Max

User-Supplied

Fuse

Load

2 A Max

User-Supplied

Fuse

2 A Max

User-Supplied

Fuse

[c]FP-DO-403 6 ni.com

Digital Output Circuit

The [c]FP-DO-403 digital output channels are optically isolated

from the rest of the FieldPoint bank. In the ON state, a transistor is

turned on between the 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. The VOUT

terminal sinks current from external devices. Sinking current

means the VOUT terminal provides a path to the supply common.

Ensure that no channel sinks more than 2 A, and that the total

current supplied by all channels at any time is no more than 16 A2.

To determine whether the total current is within the limit, square

the current on each channel and add the squares together. If the sum

of all the squares is less than or equal to 16 A2, the total current is

within the limit. In the following example, three channels sink 2 A

and four channels sink 1 A each:

(2 A)2+ (2 A)2+ (2 A)2+ (1 A)2

+ (1 A)2+ (1 A)2+ (1 A)2≤ 16 A2

Caution The outputs must not be short-circuited to the

potential of the V or VSUP terminals (the positive voltage

of the external supply). Short circuits damage the

[c]FP-DO-403 output channels. 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 ×0.12 Ω= 4.88 V

Protection for Inductive Loads

When an inductive load, such as a motor or relay, is connected to

an output, a large counter-electromotive force may occur at

switching time because of the energy stored in the inductive load.

This flyback voltage can damage the outputs and the power supply.

It is best to limit such flyback voltages at the inductive load by

installing a flyback diode across the load. Typically, you should

mount the flyback diode within 18 in. of the load. Figure 5 shows

a flyback diode connected to an inductive load.

Figure 5. Connection to Inductive Load with Flyback Diode

Although the [c]FP-DO-403 contains flyback diodes to prevent

excessively high voltage from damaging the module, National

Instruments recommends the use of an external protection circuit

across any inductive load.

Status Indicators

The [c]FP-DO-403 has two green status LEDs, POWER and

READY. After you insert the FP-DO-403 into a terminal base

or the cFP-DO-403 into a backplane and apply power to the

connected network module, the green POWER indicator lights

and the [c]FP-DO-403 informs the network module of its presence.

When the network module recognizes the [c]FP-DO-403, it sends

initial configuration information to the [c]FP-DO-403. After the

module receives this initial information, the green READY

indicator lights and the [c]FP-DO-403 is in 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 the [c]FP-DO-403 to any circuits

that may contain hazardous voltages.

This section describes the isolation of the [c]FP-DO-403 and its

compliance with international safety standards. The field wiring

connections are isolated from the backplane and the inter-module

communication bus. The isolation barriers in the module provide

Flyback Diode

VOUT Load

V or VSUP

[c]FP-DO-403 8 ni.com

250 Vrms Measurement Category II continuous isolation, verified

by 2,300 Vrms, 5 s dielectric withstand test. The [c]FP-DO-403

provides double insulation (compliant with IEC 61010-1) for

working voltages of 250 Vrms1. 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.

Never try to use any isolation product between human-accessible

parts (such as DIN rails or monitoring stations) and circuits that

can be at hazardous potentials under normal conditions, unless the

product is specifically designed for such an application, as is the

[c]FP-DO-403.

Even though the [c]FP-DO-403 is designed to handle applications

with hazardous potentials, follow these guidelines to ensure a safe

total system:

• There is no isolation between channels on the [c]FP-DO-403.

If a hazardous voltage is present on any channel, all channels

are considered hazardous. Make sure that all other devices and

circuits connected to the module are properly insulated from

human contact.

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

terminals) with other devices (including other FieldPoint

devices), unless those devices are isolated from human contact.

• For Compact FieldPoint, you must connect the protective earth

(PE) ground terminal on the cFP-BP-xbackplane to the system

safety ground. The backplane PE ground terminal has the

following symbol stamped beside it: . Connect the

backplane PE ground terminal to the system safety ground

using 14 AWG (1.6 mm) wire with a ring lug. Use the 5/16 in.

panhead screw shipped with the backplane to secure the ring

lug to the backplane PE ground terminal.

• As with any hazardous voltage wiring, make sure that all

wiring and connections meet applicable electrical codes and

commonsense practices. Mount terminal bases and backplanes

in an area, position, or cabinet that prevents accidental or

unauthorized access to wiring that carries hazardous voltages.

1 Working voltage is defined as the signal voltage plus the common-mode voltage.

Common-mode voltage is the voltage of the module with respect to ground.

•Donot use the [c]FP-DO-403 as the only isolating barrier

between human contact and working voltages higher than

250 Vrms .

• Operate the [c]FP-DO-403 only at or below Pollution

Degree 2. Pollution Degree 2 means that only nonconductive

pollution occurs in most cases. Occasionally, however, a

temporary conductivity caused by condensation must be

expected.

• Operate the [c]FP-DO-403 at or below Measurement

Category II. Measurement Category II is for measurements

performed on circuits directly connected to the low-voltage

installation. This category refers to local-level distribution,

such as that provided by a standard wall outlet.

Safety Guidelines for Hazardous Locations

The [c]FP-DO-403 is suitable for use in Class I, Division 2, Groups

A, B, C, D, T4 hazardous locations; Class I, Zone 2, AEx nA IIC

T4 and Ex nA IIC T4 hazardous locations; and nonhazardous

locations only. Follow these guidelines if you are installing the

[c]FP-DO-403 in a potentially explosive environment. Failing to

follow these guidelines may result in serious injury or death.

Caution Make sure that all products you use in hazardous

locations are certified for such use. Refer to the product

label or visit ni.com/certification, search by model

number or product line, and click the appropriate link in

the Certification column.

Caution Do not disconnect I/O-side wires or connectors

unless power has been switched off or the area is known

to be nonhazardous.

Caution Do not remove modules unless power has been

switched off or the area is known to be nonhazardous.

Caution Substitution of components may impair

suitability for Class I, Division 2.

Caution For Zone 2 applications, install the FieldPoint

system in an enclosure rated to at least IP 54 as defined

by IEC 60529 and EN 60529.

[c]FP-DO-403 10 ni.com

Caution For Zone 2 applications, install a protection

device across the external power supply and the COM

terminal. The device must prevent the external power

supply voltage from exceeding 42 V if there is a transient

overvoltage condition.

Special Conditions for Hazardous Locations Use in Europe

The [c]FP-DO-403 has been evaluated as EEx nC IIC T4

equipment under DEMKO Certificate No. 03 ATEX 0251502X.

Each module is marked II 3G and is suitable for use in Zone 2

hazardous locations.

Specifications

These specifications are typical for –40 to 70 °C unless otherwise

noted. Specifications are subject to change without notice.

Output Characteristics

Number of channels .......................... 16

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

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

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

(0.12 V drop at 1 A)

Maximum current

Per channel ................................. 2 A

All channels

FP-DO-403........................... 16 A2

cFP-DO-403......................... 16 A2at–40to60°C

12 A2at 60 to 70 °C

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

Output delay time ............................. 50 μs

Physical Characteristics

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

READY indicators, 16 green

output state indicators

Weight

FP-DO-403 ................................. 140 g (4.8 oz)

cFP-DO-403 ............................... 110 g (3.7 oz)

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