National Instruments NI 9472, NI 9474 Safety

© National Instruments Corp. 21 NI 9472/9474

Ferrules................................. ............0.25 mm2 to 2.5 mm2

Weight

NI 9472/9474 with

screw terminal........................... .150 g (5.3 oz)

NI 9472 with DSUB...................145 g (5.1 oz)

Safety

NI 9472/9474 with Screw Terminal SafetyVoltages

Connect only voltages that are within the following limits.

Channel-to-COM.............................. 30 VDC max

Isolation

Channel-to-channel.................... None

Channel-to-earth ground

Continuous...........................250 Vrms,

MeasurementCategory II

Withstand.............................2,300 Vrm s, verified by a 5 s

dielectric withstand test

Measurement Category II is for measurements performed on

circuits directly connected to the electrical distribution system.

Contents

Main Safety Guidelines Safety Guidelines for Hazardous Voltages Page Safety Guidelines for Hazardous Locations Special Conditions for Hazardous Locations Use in Europe Special Conditions for Marine Applications Connecting the NI 9472/9474 The NI 9472/9474 provides connections for eight digital output channels. Figure 2. NI 9472/9474 Terminal and Pin Assignments Page Page Page Increasing Current Drive Wiring for High-Vibration Applications I/O Protection Understanding Short-Circuit-Proof Devices Power Supplies and Overcurrent Conditions Detecting an Overcurrent Condition Resetting Channels After an Overcurrent Condition Sleep Mode Specifications Output Characteristics Page NI 9472 Power Requirements NI 9474 Power Requirements Physical Characteristics Safety NI 9472/9474 with Screw Terminal SafetyVoltages NI 9472 with DSUB Safety Voltages Safety Standards Hazardous Locations Environmental Shock and Vibration Electromagnetic Compatibility CE Compliance Environmental Management Waste Electrical and Electronic Equipment (WEEE) Where to Go for Support RoHS Page 373509E-01 May08