(cDAQ/cRIO) The cDAQ and cRIO platforms are rugged systems designed to be used in a variety of industrial environments. These specifications describe the conditions that cDAQ and cRIO are guaranteed to work in. Modules and backplanes are rated separately, so verify that all components of your system meet the specifications for your environment.
The cDAQ-9174 has an operating temperature range of -20 °C to 55°C, and a maximum altitude of 5,000 m. If operated at a temperature below 0 °C, verify that your power supply is also rated for that temperature range.
(cDAQ/cRIO) For more information about NI's commitment to design and manufacture products in an environmentally responsible manner, visit ni.com/environment.
Hazardous Locations Certifications
(cDAQ/cRIO) A hazardous location is an environment that contains potentially flammable or explosive material in the surrounding atmosphere. In North America, the class describes the nature of flammable material (e.g. gas, dust, etc.), the division describes what conditions the hazardous materials may exist under (normal or abnormal), and the group describes the specific type of material present (e.g. acetylene, hydrogen, etc.). Consult your device's user manual or getting started guide for cautions on operating in hazardous locations.
The cRIO-9068 is certified for various locations, but specifically for UL Class I, Division 2, Group A as well as IECEx IIC. Both of these certifications are for locations where acetylene gas may be present.
Hazardous Locations Classifications - CSA
(cDAQ controllers/cRIO) Computer memory comes in two forms: non-volatile and volatile. Volatile memory requires power to maintain data, while non-volatile memory does not. In cDAQ and cRIO controllers, code is deployed to non-volatile solid state drives (SSDs). DRAM is a type of volatile memory, which is used to store program variables and other information.
The cRIO-9068 has 1 GB of non-volatile solid state memory, and 512 MB of volatile DRAM memory.
(cDAQ/cRIO) Mean time between failure (MTBF) is the average time between failure events for a repairable product. It is the mean number of life units during which all parts of the item perform within their specified limits, during a particular measurement interval under stated conditions. MTBF is a statistical estimate that is commonly used to calculate the probability of success (reliability) or the probability of failure for a product for a duration of operation in a defined environment.
What is MTBF (Mean Time Between Failures)?
Operating System (OS)
(cDAQ controllers/cRIO) Each compact controller features a built-in multicore processor that runs an embedded operating system, either a Windows OS or a real-time OS. Windows controllers provide an extensive software ecosystem that supports the LabVIEW for Windows platform, plus a familiar user experience. Real-time controllers offer increased software reliability and features designed to optimize headless operation and long-term deployment.
The cDAQ-9133 supports Windows Embedded Standard 7 and NI Linux Real-Time, while the cRIO-9039 only supports NI Linux Real-Time.
Introduction to NI Linux Real-Time
(cDAQ/cRIO) NI publishes dimensional drawings of most products that can be used to check clearance prior to purchasing a device or creating a model of the system being created. Physical characteristics also describe the wiring requirements for terminal connections.
(cDAQ/cRIO) It is important to know the power requirements of your system so that the correct amount of power can be sourced. NI sells power supplies that meet the recommended specifications, but you may use a third party or custom power supply as needed. Make sure that your power supply is suited for your environment, especially in hazardous or rugged conditions. Some C Series modules have additional power requirements separate from the backplane.
The cDAQ-9178 requires a National Electric Code (NEC) Class 2 power source, and consumes at most 15 W, including 1 W drawn by each module in a fully populated system.
Powering Your CompactDAQ System
(cDAQ controllers/cRIO) The processor, or CPU, is the computational and control unit of a computer that interprets and executes instructions. High-performance cDAQ and cRIO Controllers have onboard processors that provide more computational power for complex measurement or control applications.
The cDAQ-9133 features an Intel Atom E3825.
(cRIO) Field-programmable gate arrays (FPGAs) are reprogrammable silicon chips that connect processing logic to I/O blocks. They consist of various components including:
- Logic Cells – The basic logic unit of an FPGA. Also referred to as configurable logic blocks (CLBs) or slices.
- Flip Flops – Binary shift registers used to synchronize logic and save logical states between clock cycles.
- Look up tables (LUTs) – Small amounts of RAM used to implement digital truth tables within a logic cell.
- DSP Slices – Dedicated, high speed multiplication blocks.
- Logical Interrupts – Tools to notify the host VI of events such as data being ready, an error occurring, or a task finishing.
- Direct Memory Access (DMA) Channels – Transfers data directly between memory and the device, without going through the CPU.
The cRIO-9068 uses a Xilinx Zynq 7020 FPGA. In comparison, the cRIO-9039 uses a Xilinx Kintex-7 7K325T, which has a greater capacity.
Safety, Electromagnetic Compatibility, CE Compliance
(cDAQ/cRIO) cDAQ and cRIO chassis are tested and in compliance with various standards, which are listed in the three sections of our specifications manuals. For more information on any standard, visit ni.com/certifications.
You can view the compliance specifications for the cDAQ-9178 by using the certifications search: NI cDAQ-9178 - Product Certification.
(cDAQ/cRIO) Connections to cDAQ and cRIO chassis are rated for various categories of voltages. Measurement Category CAT O, previously known as Measurement Category CAT I, is for measurements of loads, devices, or circuits that are not directly connected to MAINs, and are isolated. Measurement Category CAT II is for measurements that could be connected to MAINs or are not isolated from MAINs. For C Series Modules, their safety voltage ratings are for the specific connection (e.g. RS-485 Serial Port, etc.), so modules with high voltage ratings can be used in any chassis.
Safely connect up to 30 V (Measurement Category I) across the V terminal and C terminal on the cDAQ-9188.
What are Measurement Categories (CAT I, CAT II, etc.)?
Shock and Vibration
(cDAQ/cRIO) cDAQ and cRIO chassis are tested to specific industry standards to ensure that stated accuracy per the specifications and device integrity is maintained over the stated shock and vibe specifications. It is important not to exceed these specified values to ensure correct and accurate operation of the device. All cRIO and cDAQ chassis, as well as C Series Modules, are tested for the same shock and vibration standards. However, meeting these specifications may require certain mounting or connection procedures, which are explained in your chassis' user manual.
In order to meet the shock and vibration specifications for the cDAQ-9178, you must panel mount the system, use ferrules on the ends of terminal lines, and use an NI locking USB cable.