Special Conditions for Hazardous Locations Use
in Europe and Internationally
The NI 9425 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 9425 with
DSUB has been evaluated as Ex nA IIC T4 Gc equipment under DEMKO 03 ATEX
0324020X and is IECEx UL 14.0089X certified. Each NI 9425 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 9425 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.
Caution
Transient protection shall be provided that is set at a level not
exceeding 140% of the peak rated voltage value of 85 V at the supply
terminals to the equipment.
Caution
The system shall only be used in an area of not more than
Pollution Degree 2, as defined in IEC/EN 60664-1.
Caution
The system shall be mounted in an ATEX/IECEx-certified
enclosure with a minimum ingress protection rating of at least IP54 as
defined in IEC/EN 60079-15.
Caution
The enclosure must have a door or cover accessible only by the
use of a tool.
© National Instruments
3
NI-9425 Getting Started
© 2023 National Instruments Corporation.
