User's Manual

locations. If you are using the NI 9201/9221 in Gas Group IIC

hazardous locations or in ambient temperatures of

–40 °C ≤ Ta ≤ 70 °C, you must use the device in an NI chassis

that has been evaluated as EEx nC IIC T4, Ex nA IIC T4, or

Ex nL IIC T4 equipment.

Special Conditions for Marine Applications

Some modules are Lloyd’s Register (LR) Type Approved for

marine applications. To verify Lloyd’s Register certification, visit

ni.com/certification and search for the LR certificate, or

look for the Lloyd’s Register mark on the module.

Caution To meet radio frequency emission requirements

for marine applications, use shielded cables and install

the system in a metal enclosure. Suppression ferrites

must be installed on power supply inputs near power

entries to modules and controllers. Power supply and

module cables must be separated on opposite sides of the

enclosure and must enter and exit through opposing

enclosure walls.