User's Manual

Safety Guidelines

Operate the NI 9201/9221 only as described in these operating

instructions.

Hot Surface This icon denotes that the component may be

hot. Touching this component may result in bodily injury.

Safety Guidelines for Hazardous Voltages

Yo u can connect hazardous voltages only to the NI 9201/9221 with

screw terminal. Do not connect hazardous voltages to the

NI 9201/9221 with DSUB.

If hazardous voltages are connected to the module, take the

following precautions. A hazardous voltage is a voltage greater

than 42.4 V

or 60 VDC to earth ground.

Caution Ensure that hazardous voltage wiring is

performed only by qualified personnel adhering to local

electrical standards.

Caution Do not mix hazardous voltage circuits and

human-accessible circuits on the same module.