C Series Digital Output and Relay Modules
NI 940x, NI 947x, NI 948x
NEW!
• High- and low-speed high-voltage digital outputs
(up to 60 V), 5 V/TTL, SPST (Form A) electromechanical
relay outputs or solid-state relay outputs
• Up to 32 channels per module; up to 256 channels
per 8-slot chassis
• Down to 100 ns output rate for ultrahigh-speed control,
pulse-width modulation (PWM), or digital communication
• Isolation up to 2,300 V
rms
(withstand), up to
250 V
rms
(continuous)
• Externally powered with high current-switching capacity
(up to 20 A per module) for direct control of a wide array
of industrial actuators
• Short-circuit-proof outputs available to protect from
damage caused by current surges
Compatibility
Product
NI 9401
NI 9403
NI 9472
NI 9474
NI 9476
NI 9477
NI 9481
NI 9485
CompactRIO NI CompactDAQ
Logic
Channels Sink/Source I/O Delay Time
5 V/TTL
8
Sink/Source
100 ns
5 V/TTL
32
Sink/Source
7 µs
High Voltage
8
Source
100 µs
High Voltage
8
Source
1 µs
High Voltage
32
Source
500 µs
High Voltage
32
Sink
8 µs
Form A
4
Sink/Source
10 ms
SSR
8
Sink/Source
9 ms
Signal Levels
5V
5V
6 to 30 V
5 to 30 V
6 to 36 V
5 to 60 V
60 VDC, 250 VAC
60 VDC, 30 VAC
Output Current per Channel Isolation Connector Options
2 mA
D-Sub
2 mA
D-Sub
750 mA
Screw Terminal, D-Sub
1A
Screw Terminal
250 mA
D-Sub
625 mA
D-Sub
2 A (30 VDC)
Screw Terminal
750 mA
Screw Terminal
Table 1. C Series Digital Output and Relay Module Selection Guide
Overview
High-performance digital output and switching modules for National
Instruments CompactRIO embedded systems, R Series expansion
chassis, and NI CompactDAQ systems provide extended voltage ranges
and high current-switching capacity for direct control of a wide array of
industrial and automotive actuators. Each module features an integrated
connector junction box with screw-terminal or cable options for flexible,
low-cost signal wiring. All modules feature the NI CompactRIO Extreme
Industrial Certifications and Ratings.
pulse-width modulation (PWM) outputs for controlling motors, heaters,
or fans, as well as perform pulse code modulation encoding (PCME) for
wireless telemetry applications.
Key Features
• High-performance digital output switching for any CompactRIO embedded
system, R Series expansion chassis, or NI CompactDAQ system
• Screw-terminal, strain relief, high-voltage, cable, solder-cup
backshell, and other connectivity options
• Channel-to-earth ground double-isolation barrier for safety
and noise immunity
• NI CompactRIO Extreme Industrial Certifications and Ratings
Visit
ni.com/compactrio
or
ni.com/compactdaq
for up-to-date
information on module availability, example programs, application notes,
and other developer tools.
Typical certifications – Actual specifications vary from product to
product. Visit
ni.com/certification
for details.
System Compatibility
You can use NI C Series modules interchangeably in CompactRIO and
NI CompactDAQ chassis. Many of the advanced timing features
described apply only to CompactRIO reconfigurable I/O systems and not
to NI CompactDAQ.
Advanced Features
When used in CompactRIO, C Series digital output modules connect
directly to reconfigurable I/O (RIO) FPGA hardware to create high-
performance embedded systems. The reconfigurable FPGA hardware
within CompactRIO provides a variety of options for timing, triggering,
synchronization, digital waveform generation, or digital communication.
For instance, with CompactRIO you can implement a circuit to generate
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