CompactRIO

Digital Input and Counter/Timer Modules

Overview

High-performance digital input modules for National Instruments

CompactRIO embedded systems and R Series expansion chassis

provide industrial logic levels for direct connection to a wide array

of industrial switches and transducers. Each module features an

integrated

connector

junction

box

with

screw

terminal

or cable options for flexible and low cost signal wiring. All modules

feature the NI CompactRIO Extreme Industrial Certifications

and Ratings.

Advanced Features

Advanced features include internal current limiting and industrial

logic thresholds for direct connection to a wide array of industrial

devices such as proximity switches, emergency stop buttons, level

switches, pressure probes, and magnetic pickups. The NI cRIO-9411

module, ideal for quadrature position encoders, features 5 V/TTL

logic levels with differential inputs up to ±24 V or single-ended

inputs. The cRIO-9411 also accepts 6 to 30 V power and generates

a regulated 5 V output for powering quadrature encoders. The

cRIO-9435 is a universal digital input module that accepts AC and

DC as well as both sinking and sourcing signals up to 250 VAC/VDC.

NI CompactRIO digital input modules connect directly to RIO

FPGA hardware to create high-performance embedded systems that

deliver the optimization and flexibility of a custom electrical circuit

completely dedicated to your I/O application. The RIO FPGA

hardware provides unlimited options for timing, triggering,

synchronization, change detection, digital pattern matching, or

digital communication. For instance, a CompactRIO system can

implement a circuit to detect digital events and record a timestamp,

implement high-reliability digital control logic in silicon, or perform

redundant safety enforcement and interlocks. Unlike traditional

digital control devices, the performance of a CompactRIO digital

control system does not decrease as the amount of digital logic

increases because of the parallel nature of the RIO FPGA circuitry.

Key Features

• High-performance digital and counter/timer input modules for

any CompactRIO embedded system or R Series expansion chassis

• Screw terminals, D-Sub, strain relief, high-voltage cable,

solder cup backshell, and other connectivity options

• cRIO-9411 module generates regulated 5 V power for quadrature

encoder or other devices

• Channel-to-earth ground double-isolation barrier for safety

and noise immunity

availability, example programs, application notes, and other

developer tools.

For ordering information, see page 381.

377

11

BUY ONLINE or CALL (866) 265-9891! Visit ni.com

• High and low-speed 24 V logic

(IEC 1131-2), differential/

single-ended inputs, or

universal AC/DC inputs

up to 250 VAC/VDC

(continuous)

• Up to 1 µs input rate for ultrahigh-

speed control or long-distance

digital communication

• Internal current limiting and

industrial logic thresholds for

direct connection to a wide array

of industrial switches, encoders,

and transducers

For more information, see page 379.

(pending)

North American

Hazardous Locations

Product

Logic

Source/Sink

Channels

I/O Delay Time

Signal Levels

Isolation

Connector

cRIO-9411

Differential or 5 V/TTL

–

6 DI/SE

500 ns

±5 to ±24 V



D-Sub

cRIO-9421

24 V

Sink

8 SE

100 µs

24 V



Screw Terminal, D-Sub

cRIO-9423

24 V

Sink

8 SE

1 µs

24 V



Screw Terminal

cRIO-9435

Universal

Sink/source

4 DI

3 ms

±5 to 250 VDC, 10 to 250 VAC



Screw Terminal