Caution Before undertaking any troubleshooting, maintenance, or exploratory procedure, carefully read the following caution notices.
Caution Protection may be impaired if equipment is not used in the manner specified.

This equipment contains voltage hazardous to human life and safety, and is capable of inflicting personal injury.

  • Chassis Grounding—The chassis requires a connection from the premise wire safety ground to the chassis ground. The earth safety ground must be connected during use of this equipment to minimize shock hazards. Refer to the Connecting Safety Ground section for instructions on connecting safety ground.
  • Live Circuits—Operating personnel and service personnel must not remove protective covers when operating or servicing the chassis. Adjustments and service to internal components must be undertaken by qualified service technicians. During service of this product, the mains connector to the premise wiring must be disconnected. Dangerous voltages may be present under certain conditions; use extreme caution.
  • Explosive Atmosphere—Do not operate the chassis in conditions where flammable gases are present. Under such conditions, this equipment is unsafe and may ignite the gases or gas fumes.
  • Part Replacement—Only service this equipment with parts that are exact replacements, both electrically and mechanically. Contact National Instruments for replacement part information. Installation of parts with those that are not direct replacements may cause harm to personnel operating the chassis. Furthermore, damage or fire may occur if replacement parts are unsuitable.
  • Modification—Do not modify any part of the chassis from its original condition. Unsuitable modifications may result in safety hazards.
  • Location—The chassis is for use in stationary (non-moveable), restricted access locations such as a desk or bench, or for installation in a rack only. Installation and maintenance are to be performed by skilled/trained service persons.