NI-9208 chassis module


The NI 9208 provides overvoltage protection for each channel.

Continuous:250 Vrms, Measurement
Category II

Withstand up to 4,000 m:3,000 Vrms, verified by a 5 s dielectric withstand test

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NI 9208 16-Channel, ±20 mA, 24-Bit Analog Input Module


Measurement Category I is for measurements performed on circuits not directly connected to the electrical distribution system referred to as MAINS voltage. MAINS is a hazardous live electrical supply system that powers equipment. This category is for measurements of voltages from specially protected secondary circuits. Such voltage measurements include signal levels, special equipment, limited-energy parts of equipment, circuits powered by regulated low-voltage sources, and electronics.


Safety Guidelines for Hazardous Locations

The NI 9208 is suitable for use in Class I, Division 2, Groups A, B, C, D, T4 hazardous locations; Class I, Zone 2, AEx nA IIC T4 and Ex nA IIC T4 hazardous locations; and nonhazardous locations only. Follow these guidelines if you are installing the NI 9208 in a potentially explosive environment. Not following these guidelines may result in serious injury or death.


Special Conditions for Hazardous Locations Use in Europe and Internationally

The NI 9208 with spring terminal has been evaluated as Ex nA IIC T4 Gc equipment under DEMKO 12 ATEX 1202658X and is IECEx UL 14.0089X certified. The NI 9208 with DSUB has been evaluated as Ex nA IIC T4 Gc equipment under DEMKO Certificate No. 07 ATEX 0626664X and is IECEx UL 14.0089X certified. Each NI 9208 is marked II 3G and is suitable for use in Zone 2 hazardous locations, in ambient temperatures of -40 °C ≤ Ta ≤ 70 °C. If you are using the NI 9208 in Gas Group IIC hazardous locations, you must use the device in an NI chassis that has been evaluated as Ex nC IIC T4, Ex IIC T4, Ex nA IIC T4, or Ex nL IIC T4 equipment.

This product is intended for use in industrial locations. However, harmful interference may occur in some installations, when the product is connected to a peripheral device or test object, or if the product is used in residential or commercial areas. To minimize interference with radio and television reception and prevent unacceptable performance degradation, install and use this product in strict accordance with the instructions in the product documentation.

Furthermore, any changes or modifications to the product not expressly approved by National Instruments could void your authority to operate it under your local regulatory rules.


Ensure that the environment in which you are using the NI 9208 meets the following specifications.
Operating temperature
(IEC 60068-2-1, IEC 60068-2-2) -40 °C to 70 °C
Operating humidity
(IEC 60068-2-78) 10% RH to 90% RH,noncondensing
Pollution Degree 2

Maximum altitude
For NI 9208 with spring terminal 4,000 m
For NI 9208 with DSUB 2,000 m


NI 9208 Connection Guidelines

• Make sure that devices you connect to the NI 9208 are compatible with the module specifications.

• You must use 2-wire ferrules to create a secure connection when connecting more than one wire to a single terminal on the NI 9208 with spring terminal. • Push the wire into the terminal when using a solid wire or a stranded wire with a ferrule.

• Open the terminal by pressing the push button when using stranded wire without a ferrule.


High-Vibration Application Connections

If your application is subject to high vibration, NI recommends that you use the NI 9940 backshell kit to protect connections to the NI 9208 with spring terminal.