National Instruments NI 9421, Getting Started Manual

Page 1: ...GETTING STARTED GUIDE NI 9421 8 Channel Sinking Digital Input Module...

Page 2: ...e specific to the NI 9421 The other components in the system might not meet the same safety ratings Refer to the documentation for each component in the system to determine the safety and EMC ratings...

Page 3: ...o not connect hazardous voltages to the NI 9421 with DSUB Caution Ensure that hazardous voltage wiring is performed only by qualified personnel adhering to local electrical standards Caution Do not mi...

Page 4: ...on Channel to channel None Channel to earth ground Continuous 250 Vrms Measurement Category II Withstand 2 300 Vrms verified by a 5 s dielectric withstand test Measurement Category II is for measureme...

Page 5: ...d Continuous 60 VDC Measurement Category I Withstand 1 000 Vrms verified by a 5 s dielectric withstand test Measurement Category I is for measurements performed on circuits not directly connected to t...

Page 6: ...urement Categories CAT II CAT III or CAT IV Safety Guidelines for Hazardous Locations The NI 9421 is suitable for use in Class I Division 2 Groups A B C D T4 hazardous locations Class I Zone 2 AEx nA...

Page 7: ...ions connected signals must be within the following limits Capacitance 0 2 F max Special Conditions for Hazardous Locations Use in Europe and Internationally The NI 9421 has been evaluated as Ex nA II...

Page 8: ...nted in an ATEX IECEx certified enclosure with a minimum ingress protection rating of at least IP54 as defined in IEC EN 60079 15 Caution The enclosure must have a door or cover accessible only by the...

Page 9: ...dation install and use this product in strict accordance with the instructions in the product documentation Furthermore any changes or modifications to the product not expressly approved by National I...

Page 10: ...ing measurement probes and cables to ensure that the desired EMC performance is attained Preparing the Environment Ensure that the environment in which you are using the NI 9421 meets the following sp...

Page 11: ...o the device datasheet on ni com manuals for complete specifications Connecting the NI 9421 The NI 9421 provides connections for eight digital input channels NI 9421 Getting Started Guide National Ins...

Page 12: ...COM NC COM COM NC COM COM DI0 NC DI1 DI2 NC DI3 DI4 NC DI5 DI6 NC DI7 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 0 3 4 7 Note You must use 2 wire ferrules to create a secure co...

Page 13: ...terminal or pin DI provides a path to COM for the current or voltage The NI 9421 internally limits current signals connected to DI Connecting Sourcing Output Devices You can connect 2 3 and 4 wire so...

Page 14: ...t that is in the input ON range to DI The channel registers as OFF when the device applies a voltage or drives a current that is in the input OFF range to DI If no device is connected to DI the channe...

Page 15: ...is subject to high vibration NI recommends that you follow these guidelines to protect connections to the NI 9421 Use ferrules to terminate wires to the detachable connector Use the NI 9927 backshell...

Page 16: ...tware CompactRIO NI CompactDAQ RELATED INFORMATION C Series Documentation Resources ni com info cseriesdoc Services ni com services NI 9421 Datasheet NI RIO Help LabVIEW FPGA Help NI 9421 Datasheet NI...

Page 17: ...al Instruments product Product registration facilitates technical support and ensures that you receive important information updates from NI A Declaration of Conformity DoC is our claim of compliance...

Page 18: ...National Instruments products technology refer to the appropriate location Help Patents in your software the patents txt file on your media or the National Instruments Patent Notice at ni com patents...