CompactRIO
Digital Input and Counter/Timer Modules
NI cRIO-9411, NI cRIO-942x, NI cRIO-9435
NEW!
• High and low-speed 24 V logic
(IEC 1131-2), differential/
single-ended inputs, or
universal AC/DC inputs
up to 250 VAC/VDC
• Isolation up to 2,300 V
rms
(withstand), up to 250 V
rms
(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
CompactRIO
Digital Input and Counter/Timer Modules
Product
cRIO-9411
cRIO-9421
cRIO-9423
cRIO-9435
Logic
Differential or 5 V/TTL
24 V
24 V
Universal
Source/Sink
–
Sink
Sink
Sink/source
Channels
6 DI/SE
8 SE
8 SE
4 DI
I/O Delay Time
500 ns
100 µs
1 µs
3 ms
Signal Levels
±5 to ±24 V
24 V
24 V
±5 to 250 VDC, 10 to 250 VAC
Isolation
Connector
D-Sub
Screw Terminal, D-Sub
Screw Terminal
Screw Terminal
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.
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
• NI CompactRIO Extreme Industrial Certifications and Ratings
1
• 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
Visit
ni.com/compactrio
for up-to-date information on module
availability, example programs, application notes, and other
developer tools.
For ordering information, see page 381.
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
1
11
North American
Hazardous Locations
(pending)
See CompactRIO Overview on page 366 for details.
For more information, see page 379.
BUY ONLINE or CALL (866) 265-9891!
Visit
ni.com
377
NI [ NATIONAL INSTRUMENTS CORPORATION ]
