Electromagnetic Compatibility

Emissions ............................................

EN 55011 Class A at 10 m

FCC Part 15A above 1 GHz

Immunity..............................................

Industrial levels per

EN 61326:1997 + A2:2001,

Table 1

EMC/EMI.............................................

CE, C-Tick, and FCC Part 15

(Class A) Compliant

Note: For EMC compliance, operate this device with shielded cabling.

CE Compliance

This product meets the essential requirements of applicable European

Directives, as amended for CE marking, as follows:

Low-Voltage Directive (safety) ...........

73/23/EEC

Electromagnetic Compatibility

Directive (EMC)...............................

89/336/EEC

Note: Refer to the Declaration of Conformity (DoC) for this product for

any additional regulatory compliance information. To obtain the DoC for

product line, and click the appropriate link in the Certification column.

Safety Guidelines

Caution: Operate the hardware only as described in these operating

instructions.

The following section contains important safety information that you

must follow when installing and using the USB-6501.

Do not operate the USB-6501 in a manner not specified in this document.

Misuse of the device can result in a hazard. You can compromise the

safety protection built into the device if the device is damaged in any

way. If the device is damaged, contact National Instruments for repair.

Do not substitute parts or modify the device except as described in this

document. Use the device only with the chassis, modules, accessories,

and cables specified in the installation instructions. You must have all

covers and filler panels installed during operation of the device.

Do not operate the device in an explosive atmosphere or where there

may be flammable gases or fumes. If you must operate the device in

such an environment, it must be in a suitably rated enclosure.

If you need to clean the device, use a dry cloth. Make sure that the

device is completely dry and free from contaminants before returning it

to service. Operate the device only at or below Pollution Degree 2.

Pollution is foreign matter in a solid, liquid, or gaseous state that can

reduce dielectric strength or surface resistivity. The following is a

description of pollution degrees:

• Pollution Degree 1 means no pollution or only dry, nonconductive

pollution occurs. The pollution has no influence.

• Pollution Degree 2 means that only nonconductive pollution occurs in

most cases. Occasionally, however, a temporary conductivity caused

by condensation must be expected.

• Pollution Degree 3 means that conductive pollution occurs, or dry,

nonconductive pollution occurs that becomes conductive due to

condensation.

You must insulate signal connections for the maximum voltage for which

the device is rated. Do not exceed the maximum ratings for the device.

Do not install wiring while the device is live with electrical signals. Do

not remove or add connector blocks when power is connected to the

system. Avoid contact between your body and the connector block signal

when hot swapping modules. Remove power from signal lines before

connecting them to or disconnecting them from the device.

stresses (overvoltage) from the circuit to which they are connected

during measurement or test. Measurement categories establish

standard impulse withstand voltage levels that commonly occur in

electrical distribution systems. The following is a description of

measurement categories:

• Measurement Category I is for measurements performed on circuits

not directly connected to the electrical distribution system referred to

from specially protected secondary circuits. Such voltage

measurements include signal levels, special equipment, limited-

energy parts of equipment, circuits powered by regulated low-voltage

sources, and electronics.

1

Measurement Category as defined in electrical safety standard IEC 61010-1. Measurement

Category is also referred to as Installation Category.

2

Working Voltage is the highest rms value of an AC or DC voltage that can occur across any

particular insulation.

3

MAINS is defined as a hazardous live electrical supply system that powers equipment.

Suitably rated measuring circuits may be connected to the MAINS for measuring purposes.

• Measurement Category II is for measurements performed on circuits

directly connected to the electrical distribution system. This category

refers to local-level electrical distribution, such as that provided by a

standard wall outlet (for example, 115 V for U.S. or 230 V for Europe).

Examples of Measurement Category II are measurements performed

on household appliances, portable tools, and similar E Series devices.

• Measurement Category III is for measurements performed in the

building installation at the distribution level. This category refers to

measurements on hard-wired equipment such as equipment in fixed

installations, distribution boards, and circuit breakers. Other examples

are wiring, including cables, bus-bars, junction boxes, switches,

socket-outlets in the fixed installation, and stationary motors with

permanent connections to fixed installations.

• Measurement Category IV is for measurements performed at the

primary electrical supply installation (<1,000 V). Examples include

electricity meters and measurements on primary overcurrent

protection devices and on ripple control units.

Low-Cost Digital I/O Device for USB

4

BUY ONLINE at ni.com or CALL 800 813 3693 (U.S.)