National Instruments NI 9403 Manual de usuario

OPERATING INSTRUCTIONS AND SPECIFICATIONS

NI 9403

32-Channel, TTL Digital Input/Output Module

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NI 9403 Operating Instructions and Specifications 2 ni.com

This document describes how to use the National Instruments 9403

and includes specifications and pin assignments for the NI 9403.

Visit ni.com/info and enter rdsoftwareversion to determine

which software youneed for the modules youare using. For

information about installing, configuring, and programming the

system, refer to the system documentation. Visit ni.com/info

and enter cseriesdoc for information about C Series

documentation.

Note The safety guidelines and specifications in this

document are specific to the NI 9403. The other

components in the system might not meet the same safety

ratings and specifications. Refer to the documentation for

each component in the system to determine the safety

ratings and specifications for the entire system. Visit

ni.com/info and enter cseriesdoc for information

about C Series documentation.

Safety Guidelines

Operate the NI 9403 only as described in these operating

instructions.

Hot Surface This icon denotes that the component may be

hot. Touching this component may result in bodily injury.

Safety Guidelines for Hazardous Locations

The NI 9403 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 youare installing the NI 9403 in a

potentially explosive environment. Not following these guidelines

may result in serious injury or death.

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.

NI 9403 Operating Instructions and Specifications 4 ni.com

Caution Substitution of components may impair

suitability for Class I, Division 2.

Caution For Zone 2 applications, install the system

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

IEC 60529 and EN 60529.

Caution For Zone 2 applications, connected signals must

be within the following limit:

Capacitance .......................... 0.02 μF max

Special Conditions for Hazardous Locations Use in Europe

This equipment has been evaluated as Ex nA IIC T4 equipment

under DEMKO Certificate No. 07 ATEX 0626664X. Each module

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

locations. If youare using the NI 9403 in Gas Group IIC hazardous

locations or in ambient temperatures of –40 °C ≤Ta ≤70 °C, you

must use the device in an NI chassis that has been evaluated as

EEx nC IIC T4, Ex nA IIC T4, or Ex nL IIC T4 equipment.

Special Conditions for Marine Applications

Some modules are Lloyd’s Register (LR) Type Approved for

marine applications. To verify Lloyd’s Register certification, visit

ni.com/certification and search for the LR certificate, or

look for the Lloyd’s Register mark on the module.

Caution To meet radio frequency emission requirements

for marine applications, use shielded cables and install

the system in a metal enclosure. Suppression ferrites

must be installed on power supply inputs near power

entries to modules and controllers. Power supply and

module cables must be separated on opposite sides of the

enclosure and must enter and exit through opposing

enclosure walls.

NI 9403 Operating Instructions and Specifications 6 ni.com

Connecting the NI 9403

The NI 9403 has a 37-pin DSUB connector that provides

connections for the 32 digital input/output channels.

Figure 1. NI 9403 Pin Assignments

DIO16

DIO17

DIO18

DIO19

DIO20

DIO21

DIO22

DIO23

COM

DIO24

DIO25

DIO26

DIO27

DIO28

DIO29

DIO30

DIO31

DIO0

DIO1

DIO2

DIO3

DIO4

DIO5

DIO6

DIO7

COM

DIO8

DIO9

DIO10

DIO11

DIO12

DIO13

DIO14

DIO15

RSVD

Each channel has a DIO pin to which youcan connect a digital

input or output device. The 32 DIO channels are internally

referenced to COM, so youcan use any of the four COM lines as a

reference for the external signal.

Yo ucan independently configure each DIO channel in software for

input or output. The DIO channels have Schmitt trigger inputs and

are compatible with 5 V TTL logic devices. Each input channel has

hysteresis for improved performance with noisy and

non-monotonic input signals. Each channel also has a pull-down

resistor and includes overvoltage, overcurrent, and short-circuit

protection. Refer to the Specifications section for more information

about input thresholds and overvoltage protection. Refer to the

Overcurrent/Short-Circuit Protection section for more

information about overcurrent and short-circuit protection.

NI 9403 Operating Instructions and Specifications 8 ni.com

Refer to Figure 2 for an illustration of several types of digital

devices connected to the NI 9403.

Figure 2. Connecting Digital Devices to the NI 9403

TTL Signal

+5 V

LED

DIO0 as Input

DIO1 as Input

COM

DIO2 as Output

NI 9403

Dev 3

Dev 2

Dev 1

Overcurrent/Short-Circuit Protection

The overcurrent protection allows only a specified amount of

current through the output channels to protect the NI 9403 from

short circuits. If the NI 9403 goes into an overcurrent state, the

module sets all the DIO channels to high impedance for

approximately 280 milliseconds. When the channels are in this

state, the NI 9403 can accept new line direction configuration and

output state data but cannot pass valid input data to the software.

After the protection period, the NI 9403 automatically recovers to

the latest direction configuration and output state. If the

overcurrent condition still exists, the module again sets the

channels to high impedance. This cycle continues until the

overcurrent condition is removed. Refer to the Specifications

section for more information about the maximum output current.

Sleep Mode

This module supports a low-power sleep mode. Support for sleep

mode at the system level depends on the chassis that the module is

plugged into. Refer to the chassis manual for information about

support for sleep mode. If the chassis supports sleep mode, refer to

the software help for information about enabling sleep mode. Visit

NI 9403 Operating Instructions and Specifications 10 ni.com

ni.com/info and enter cseriesdoc for information about

C Series documentation.

Typically, when a system is in sleep mode, youcannot

communicate with the modules. In sleep mode, the system

consumes minimal power and may dissipate less heat than it does

in normal mode. Refer to the Specifications section for more

information about power consumption and thermal dissipation.

Specifications

The following specifications are typical for the range –40 to 70 °C

unless otherwise noted. All voltages are relative to COM unless

otherwise noted.

Input/Output Characteristics

Number of channels.......................... 32 DIO channels

Input/output type............................... TTL, single-ended

Default power-on line direction ........ Input

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