This document explains how to connect to the NI 9238. Before you begin, complete the software and Note hardware installation procedures in your chassis documentation. The guidelines in this document are specific to Note the NI 9238. The other components in the system might not meet the same safety ratings.
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MAINS voltage. MAINS is a hazardous live electrical supply system that powers equipment. This category is for measurements of voltages from specially protected secondary 4 | ni.com | NI 9238 Getting Started Guide...
Safety Guidelines for Hazardous Locations The NI 9238 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.
Zone 2 hazardous locations, in ambient temperatures of -40 °C ≤ Ta ≤ 70 °C. If you are using the NI 9238 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.
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National Instruments could void your authority to operate it under your local regulatory rules. To ensure the specified EMC performance, Caution operate this product only with shielded cables and accessories. 10 | ni.com | NI 9238 Getting Started Guide...
Cable Requirements for EMC Compliance Install cables for the NI 9238 in accordance with the following requirements: • Connect the cable shield to the chassis ground (grounding screw of the chassis). • Install an EMI Noise-Suppression Ferrite (part number 782802-01) on the input cable for each channel connected to the NI 9238.
Figure 1. NI 9238 Cable Connections for EMC Compliance Shield AI0+ Signal Source AI0– Shield AI1+ Signal Source AI1– Shield AI2+ Signal Source AI2– Shield AI3+ Signal Source AI3– NI 9238 Related Information NI 9238 Connection Guidelines on page 17...
Preparing the Environment Ensure that the environment in which you are using the NI 9238 meets the following specifications. Operating temperature -40 °C to 70 °C (IEC 60068-2-1, IEC 60068-2-2) Operating humidity 10% RH to 90% RH, (IEC 60068-2-78) noncondensing...
Negative analog input signal connection Grounded Connections Signal Source – AI– NI 9238 Make sure the voltage on the AI+ and AI- connections are in the channel-to-earth safety voltage range to ensure proper operation. 16 | ni.com | NI 9238 Getting Started Guide...
AI– NI 9238 NI 9238 Connection Guidelines • Make sure that devices you connect to the NI 9238 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 9238.
High-Vibration Application Connections If your application is subject to high vibration, NI recommends that you follow these guidelines to protect connections to the NI 9238: • Use ferrules to terminate wires to the detachable connector. • Use the NI 9971 backshell kit.
Worldwide Support and Services The NI website is your complete resource for technical support. At ni.com/support, you have access to everything from troubleshooting and application development self-help resources to email and phone assistance from NI Application Engineers. Visit ni.com/services for NI Factory Installation Services, repairs, extended warranty, and other services.
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National Instruments Patent Notice at . You can find information about end-user ni.com/patents license agreements (EULAs) and third-party legal notices in the readme file for your NI product. Refer to the Export Compliance Information at for the NI ni.com/legal/export-compliance global trade compliance policy and how to obtain relevant HTS codes, ECCNs, and other import/ export data.
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