National Instruments NI 9403E Manual de usuario

OPERATING INSTRUCTIONS AND SPECIFICATIONS

NI 9403E

32-Channel, TTL Digital Input/Output Module

NI 9403E Operating Instructions and Specifications 2 ni.com

This document describes how to use the National

Instruments 9403E and includes dimensions, pin assignments, and

specifications for the NI 9403E. Visit ni.com/info and enter

rdsoftwareversion to determine which software you need for

the modules you are 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.

Caution National Instruments makes no electromagnetic

compatibility (EMC) or CE marking compliance claims

for the NI 9403E. The end-product supplier is responsible

for conformity to any and all compliance requirements.

Caution The NI 9403E must be installed inside a suitable

enclosure prior to use. Hazardous voltages may be present.

NI 9403E Dimensions

The following figure shows the dimensions of the NI 9403E.

Figure 1. NI 9403E Dimensions in Millimeters (Inches)

73.4 (2.89)

0.0 (0.00)

26.7 (1.05)

58.4 (2.30)

66.0 (2.60)

0.0 (0.00)

NI 9403E Operating Instructions and Specifications 4 ni.com

Connecting the NI 9403E

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

connections for the 32 digital input/output channels.

Figure 2. NI 9403E 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 you can connect a digital

input or output device. The 32 DIO channels are internally

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

reference for the external signal.

You can 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 9403E Operating Instructions and Specifications 6 ni.com

Refer to Figure 3 for an illustration of several types of digital

devices connected to the NI 9403E.

Figure 3. Connecting Digital Devices to the NI 9403E

TTL Signal

+5 V

LED

DIO0 as Input

DIO1 as Input

COM

DIO2 as Output

NI 9403E

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 9403E from

short circuits. If the NI 9403E 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 9403E 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 9403E 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 9403E Operating Instructions and Specifications 8 ni.com

ni.com/info and enter cseriesdoc for information about

C Series documentation.

Typically, when a system is in sleep mode, you cannot

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 85 °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

Digital logic levels

Input

Voltage ................................. – 0.25 to 5.25 V

High, VIH.............................. 2.2 V min

Low, VIL ............................... 0.8 V max

Hysteresis, VH...................... 0.2 V min

Output

High, VOH............................. 5.2 V max

Sourcing 100 μA ........... 4.75 V min

Sourcing 2 mA............... 4.4 V min

Low, VOL

Sinking 100 μA ............. 0.1 V max

Sinking 2 mA................. 0.26 V max

Input current (0 V ≤Vin ≤4.5 V)...... ±250 μA max

Module output current1..................... 64 mA max

Input capacitance .............................. 30 pF

1 Module output current is the maximum guaranteed current that the module can drive

from all the I/O lines without going into an overcurrent state.

NI 9403E Operating Instructions and Specifications 10 ni.com

Timing

Input

Setup time1........................... 10 ns min

Hold time2............................ 60 ns min

Output

Propagation delay3............... 330 ns max

Channel-to-channel skew4... 265 ns max

1 Setup time is the amount of time input signals must be stable before reading from the

module.

2 Hold time is the amount of time input signals must be stable after initiating a read

from the module.

3 Propagation delay is the amount of time after writing to the module that the output

signals become valid.

4 Channel-to-channel skew is the amount of time between the first output signal

updating and the last output signal updating.

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