National Instruments 779640-01 User Manual Download Page 1

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USER GUIDE AND SPECIFICATIONS

NI USB-6525

This user guide describes how to use the National Instruments USB-6525
data acquisition (DAQ) device.

Introduction

The NI USB-6525 is a full-speed USB 2.0 device that provides
eight ±60 VDC channel-to-channel isolated digital inputs (DI),
eight 60 VDC/30 V

rms

channel-to-channel isolated solid-state relay (SSR)

outputs, and a 32-bit counter.

Figure 1.

USB-6525 Top View

USB Cable Strain Relief

Summary of Contents for 779640-01

Page 1: ...ata acquisition DAQ device Introduction The NI USB 6525 is a full speed USB 2 0 device that provides eight 60 VDC channel to channel isolated digital inputs DI eight 60 VDC 30 Vrms channel to channel...

Page 2: ...s Getting Started Guide that shipped with your device and is also accessible from Start All Programs National Instruments NI DAQ for more information Note For information about non Windows operating s...

Page 3: ...You can apply the signal labels on the screw terminal blocks for easy signal identification 2 Refer to Table 1 and Figure 4 for label orientation and affix provided signal labels to the screw terminal...

Page 4: ...auge between 16 AWG 28 AWG Table 1 Digital Terminal Assignments Module Terminal Signal Module Terminal Signal 1 P0 0A 17 P1 0 2 P0 0B 18 P1 0 3 P0 1A 19 P1 1 4 P0 1B 20 P1 1 5 P0 2A 21 P1 2 6 P0 2B 22...

Page 5: ...specified interval Intermediate length pulses pulses longer than half of the interval but less than the interval may or may not pass the filter The filter operates on the inputs from the optocouplers...

Page 6: ...equal to one half of the specified timing interval The input signal is sampled on each rising edge of the sample clock which is every 40 s1 A change in the input signal is recognized only if it mainta...

Page 7: ...ou can program the NI 6525 to send an interrupt when a change occurs on any input line The NI 6525 can monitor changes on selected input lines or on all input lines It can monitor for rising edges 0 t...

Page 8: ...g edges on the sensor which correspond to over limit conditions Bit 0 is connected to a switch The software can react to any switch closure which is represented by a falling edge If the switch closure...

Page 9: ...set software command within the time specified for the watchdog timer the outputs go to a user defined safe state and remain in that state until the watchdog timer is disarmed by the application and n...

Page 10: ...tions for a power supply and load connected to an isolated input Figure 6 Connecting a Power Supply and Load to the Isolated Input Caution Use twisted pair field wiring to reduce EMC noise In Figure 6...

Page 11: ...ution Use twisted pair field wiring to reduce EMC noise Power On and Power Off Conditions The default power on state of the solid state relays is open By default the solid state relays remain open whe...

Page 12: ...ct DC inductive loads and an MOV to protect AC inductive loads respectively Figure 8 Contact Protection for DC Inductive Loads Figure 9 Contact Protection for AC Inductive Loads Inductive Load USB 652...

Page 13: ...an RL value small enough to provide the necessary source current but large enough to reduce sink current and to avoid consuming unnecessary power Many TTL level applications use an RL value of 5 k Ev...

Page 14: ...ypical Solid State Relay Outputs Number of output channels 8 ch ch isolated Relay type Normally open solid state relay SSR Switching voltage 60 VDC 30 Vrms max Switching current per channel 500 mA max...

Page 15: ...state Active current 150 mA max Suspend current 350 A typ Physical Characteristics Dimensions Without connectors 6 35 cm 8 51 cm 2 31 cm 2 50 in 3 35 in 0 91 in With connectors 8 18 cm 8 51 cm 2 31 cm...

Page 16: ...60 VDC continuous Withstand 60 VDC continuous Caution Do not use this module for connection to signals or for measurements within Measurement Categories II III or IV Hazardous Locations The USB 6525 i...

Page 17: ...ows 2006 95 EC Low Voltage Directive safety 2004 108 EC Electromagnetic Compatibility Directive EMC Online Product Certification Refer to the product Declaration of Conformity DoC for additional regul...

Page 18: ...nd 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 t...

Page 19: ...e measurements include signal levels special equipment limited energy parts of equipment circuits powered by regulated low voltage sources and electronics Measurement Category II is for measurements p...

Page 20: ...an obtain the DoC for your product by visiting ni com certification If your product supports calibration you can obtain the calibration certificate for your product at ni com calibration National Inst...