National Instruments NI 9215 - Manual (Page 7)

© National Instruments Corp. 7 NI 9215 Operating Instructions and Specifications
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.