National Instruments NI 9485 Скачать руководство пользователя страница 14

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Limit flyback voltages at the inductive load by installing one of
the following:
•

For DC loads—Install a flyback diode within 45.72 cm of the
load.

•

For AC loads—Install a metal oxide varistor (MOV) rated for
30 Vrms or slightly higher.

Figure 3.

Contact Protection for DC Inductive Loads

+
–

CHa

CHb

Inductive

Load

NI 9485

Flyback Diode for

DC Inductive Loads

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NI 9485 Getting Started Guide

Содержание NI 9485

Страница 1: ...GETTING STARTED GUIDE NI 9485 8 Channel Solid State Relay SSR Digital Output Module...

Страница 2: ...Refer to the documentation for each component in the system to determine the safety and EMC ratings for the entire system Safety Guidelines Operate the NI 9485 only as described in this document Cauti...

Страница 3: ...s Caution Do not mix hazardous voltage circuits and human accessible circuits on the same module Caution Ensure that devices and circuits connected to the module are properly insulated from human cont...

Страница 4: ...lation Channel to channel up to 5 000 m Continuous 60 VDC Measurement Category I Withstand 1 000 Vrms verified by a 5 s dielectric withstand test Channel to earth ground up to 2 000 m Continuous 250 V...

Страница 5: ...s category is for measurements of voltages from specially protected secondary circuits Such voltage measurements include signal levels special equipment limited energy parts of equipment circuits powe...

Страница 6: ...ts within Measurement Categories III or IV Safety Guidelines for Hazardous Locations The NI 9485 is suitable for use in Class I Division 2 Groups A B C D T4 hazardous locations Class I Zone 2 AEx nA I...

Страница 7: ...protection device across the positive and negative terminals of the external power supply or supplies The device must prevent the external power supply from exceeding 80 V if there is a transient over...

Страница 8: ...shall only be used in an area of not more than Pollution Degree 2 as defined in IEC 60664 1 Caution The system shall be mounted in an ATEX IECEx certified enclosure with a minimum ingress protection...

Страница 9: ...television reception and prevent unacceptable performance degradation install and use this product in strict accordance with the instructions in the product documentation Furthermore any changes or mo...

Страница 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 9485 meets the following sp...

Страница 11: ...o the device datasheet on ni com manuals for complete specifications Connecting the NI 9485 The NI 9485 has a 16 terminal detachable screw terminal connector NI 9485 Getting Started Guide National Ins...

Страница 12: ...inout CH0a CH0b CH1a CH1b CH2a CH2b CH3a CH3b CH4a CH4b CH5a CH5b CH6a CH6b CH7a CH7b 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Connecting Loads You can connect loads to the NI 9485 12 ni com NI 9485 Gett...

Страница 13: ...al does not drive current or apply voltage to the load Protecting Inductive Loads When you connect inductive loads to the NI 9485 SSR outputs a large counter electromotive force may occur at switching...

Страница 14: ...tall a flyback diode within 45 72 cm of the load For AC loads Install a metal oxide varistor MOV rated for 30 Vrms or slightly higher Figure 3 Contact Protection for DC Inductive Loads CHa CHb Inducti...

Страница 15: ...gh Vibration Application Connections If your application is subject to high vibration NI recommends that you follow these guidelines to protect connections to the NI 9485 Use ferrules to terminate wir...

Страница 16: ...tware CompactRIO NI CompactDAQ RELATED INFORMATION NI 9485 Datasheet NI RIO Help LabVIEW FPGA Help NI 9485 Datasheet NI DAQmx Help LabVIEW Help C Series Documentation Resources ni com info cseriesdoc...

Страница 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...

Страница 18: ...ing 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 pate...