National Instruments NI USB-6525 User's Manual
Contents
1. 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 DD eight 60 VDC 30 Vrms channel to channel isolated solid state relay SSR outputs and a 32 bit counter I 0 6000000000000 000000000000 0 00 0000 0 0 00 9 0 9 2 o o 0 0 0 9 o 9 amp Ww NATIONAL INSTRUMENTS Inputs P1 lt 7 0 gt NI USB 6525 8 Digital Inputs amp 8 SSR Oviputs 8 8 9 9 0 90 3 0 0 0 0 0 0 0 0 0 0 0 0 o 0 0 0 0 0 0 0 0 0 0 00 0000 000 000000 6000000000000 1 USB Cable Strain Relief Figure 1 USB 6525 Top View NATIONAL p INSTRUMENTS Figure 2 USB 6525 Back View Installing Software Software support for the USB 6525 for Windows 2000 XP is provided by NI DAQmx The NI DAQmx CD contains example programs that you can use to get started programming with the USB 6525 Refer to the NJ DAQmx for USB Devices Getting Started Guide that shipped with your device and is also accessible from Start All Programs National Instruments NI DAQ for more information2. National Instruments Corporation 5 USB 6525 User Guide and Specifications Applying a DC voltage of at least 3 2 V across two input terminals registers logic high Applying no voltage or a voltage difference of 1 V or less registers logic low DC voltages between V and 3 2 V may not register a consistent or usable value Signal Connection Example Figure 5 shows signal connections for a power supply and load connected to an isolated input MOSFET Based P1 x Digital i Current Limiting Logig i Circuitry AN al RY Vsupply Computer _ i F gt Twisted Pair Ground i PY Wiring Schottky i Isolation USB 6525 Figure 5 Connecting a Power Supply and Load to the Isolated Input UN Caution Use twisted pair field wiring to reduce EMC noise In Figure 5 the USB 6525 is sensing a powered load that is connected to the power supply through a switch 5B Note Power supplies must be within the USB 6525 device range Refer to the Specifications section for information about these ranges When the switch is open no current flows through the load and no voltage is applied to the load or to the USB 6525 input The digital logic of the USB 6525 then registers a logic low for the channel When the switch is closed current flows through both the load and the USB 6525 optocoupler and the USB 6525 registers a logic high for the channel USB 6525 User Guid
3. and the count can be read or reset through software For more information about event timing requirements refer to the Specifications section Refer to your software documentation for more information about counter programming techniques Specifications The following specifications are typical at 25 C unless otherwise noted Isolated Inputs Number of input channels 8 ch ch isolated Input voltage 60 VDC to 60 VDC National Instruments Corporation 9 USB 6525 User Guide and Specifications Level Min Max Input low voltage 60 VDC 1 VDC Input high voltage 3 2 VDC 60 VDC Input Current 3 0 mA channel max Solid State Relay Outputs Number of output channels Relay type Switching voltage Switching current per channel Switching rate 90 duty cycle Relay open time Relay cl s Mei hdura ia On resistance Off state leakage Counter Number of counters Resolution Counter measurements Maximum input frequency Minimum high pulse width Minimum low pulse width Bus Interface USB specification USB 6525 User Guide and Specifications 8 ch ch isolated Normally open solid state relay SSR 60 VDC 30 Vrms max 500 mA max full operation temperature range 5 operations per second 60 us typ 1 2 ms typ 5
4. number or product line and click the appropriate link in the Certification column National Instruments Corporation 11 USB 6525 User Guide and Specifications Isolation 1 0 6 60 VDC continuous Channel to earth ground 60 VDC continuous Withstand eesis orn rrin 60 VDC continuous UN Caution Do not use this module for connection to signals or for measurements within Measurement Categories IJ III or IV Hazardous Locations The USB 6525 is not certified for use in hazardous locations Environmental The USB 6525 device is intended for indoor use only Operating temperature IEC 60068 2 1 and IEC 60068 2 2 0 to 55 C Operating humidity TEC 60068 2 56 10 to 90 RH noncondensing Maximum 2 000 m at 25 C ambient temperature Storage temperature IEC 60068 2 1 and IEC 60068 2 2 40 to 85 C Storage humidity TEC 60068 2 56 5 to 90 RH noncondensing Pollution Degree IEC 60664 2 Electromagnetic Compatibility This product is designed to meet the requirements of the following standards of EMC for electrical equipment for measurement control and laboratory use e EN 61326 EMC requirements Minimum Immunity e EN 55011 Emissions Group 1 Class A e CE C Tick ICES and FCC Pa
5. 2970 Korea 82 02 3451 3400 Lebanon 961 0 1 33 28 28 Malaysia 1800 887710 Mexico 01 800 010 0793 Netherlands 31 0 348 433 466 New Zealand 0800 553 322 National Instruments Corporation 15 USB 6525 User Guide and Specifications Norway 47 0 66 90 76 60 Poland 48 22 3390150 Portugal 351 210 311 210 Russia 7 495 783 68 51 Singapore 1800 226 5886 Slovenia 386 3 425 42 00 South Africa 27 0 11 805 8197 Spain 34 91 640 0085 Sweden 46 0 8 587 895 00 Switzerland 41 56 200 51 51 Taiwan 886 02 2377 2222 Thailand 662 278 6777 United Kingdom 44 0 1635 523545 National Instruments NI ni com and LabVIEW are trademarks of National Instruments Corporation Refer to the Terms of Use section on ni com 1legal for more information about National Instruments trademarks Other product and company names mentioned herein are trademarks or trade names of their respective companies For patents covering National Instruments products refer to the appropriate location Help Patents in your software the patents txt file on your CD or ni com patents 2006 National Instruments Corporation All rights reserved 371818A 01 Oct06
6. 3 Note For information about non Windows operating system support refer to ni com info and enter rddqld Hardware The block diagram in Figure 3 shows key functional components of the USB 6525 r i 8 Vb gs P0 lt 0 7 gt AB X m gt T 3 D USB Microcontroller 2 Current oka ae Isolated 5 Inputs A lt Figure 3 USB 6525 Block Diagram USB 6525 User Guide and Specifications 2 ni com Refer to the Safety Guidelines section of this document for important safety information Setting Up Hardware Complete the following steps to set up the hardware 1 Install combicon screw terminal blocks by inserting them into the combicon jacks 3 Note The USB 6525 kit ships with signal labels 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 blocks Insert the screw terminal blocks into their respective matching combicon jacks Refer to Figure 4 for more information about signal label orientation 1 Overlay Label with Pin Orientation Guides 3 Screw Terminal Blocks 2 Combicon Jack 4 Signal Labels Figure 4 Signal Label Application Diagram 3 Connect the wiring to the appropriate screw terminals National Instruments Corporation 3 USB 6525 User Guide and Specificatio
7. 50 mQ max 0 6 WA typ 1 P1 7 can be configured as a counter 32 bits Rising edge counting 5 KHz 20 us 180 us USB 2 0 full speed 12 Mb s ni com Power Requirements USB Input voltage 4 5 to 5 25 VDC in configured state Active current 150 mA max Suspend current eee 350 uA typ Physical Characteristics Dimensions Without connectors 6 35 cm x 8 51 cm x 2 31 cm 2 50 in x 3 35 in x 0 91 in With connectors 8 18 cm x 8 51 cm x 2 31 cm 3 22 in 3 35 in 0 91 in 0 CONMECHOTS 058s ees serei reana USB series B receptacle 2 16 position screw terminal plug headers Screw terminal 16 to 28 AWG copper conductor wire with 10 mm 0 39 in of insulation stripped from the end Torque for screw terminals 0 22 0 25 N m 2 0 2 2 lb in Weight With connectors eee Approx 87 g 3 1 02 Without connectors Approx 64 g 2 3 02 Safety Standards The USB 6525 is designed to meet the requirements of the following standards of safety for electrical equipment for measurement control and laboratory use e TEC 61010 1 EN 61010 1 e UL61010 1 CSA 61010 1 3 Note For UL and other safety certifications refer to the product label or visit ni com certification search by model
8. e and Specifications 6 ni com Solid State Relay SSR Outputs You can connect loads to the USB 6525 Connect the load to one of the leads of the power source Connect either the PO xA or the PO xB terminal to the load and the other terminal to the other lead of the AC or DC power source Figure 6 shows a possible configuration where the load is connected to the PO xB terminal and the DC or AC power source PO xA Twisted Pair Wiring Load USB 6525 Figure 6 Connecting a Load to the USB 6525 UN Caution 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 when the chassis and the USB 6525 device are powered off Protecting Inductive Loads When inductive loads are connected to the USB 6525 SSR outputs a large counter electromotive force may occur at switching time because of the energy stored in the inductive load These flyback voltages can damage the SSR outputs and or the external power supply Limit flyback voltages at your inductive load by installing one of the following e For DC loads Install a flyback diode within 18 in of the load e For AC loads Install a metal oxide varistor MOV rated for 30 Vrms or slightly higher National Instruments Corporation 7 USB 6525 User Guide and Specifications Figures 7 and 8 show examples of
9. e relay 60 VDC 30 Vrms 42 4 V pk output P1 lt 0 6 gt Input 60 VDC digital input P1 lt 0 6 gt corresponds to the positive input terminal P1 lt 0 6 gt corresponds to the negative input terminal P1 7 or PFI 0 Input This channel is configurable as either a digital input or an event counter Digital Input Signal 60 VDC digital input P1 7 corresponds to the positive input terminal P1 7 corresponds to the negative input terminal CTR As a counter this signal can be used as an event counter input source PFI 0 corresponds to the positive counter terminal PFI 0 corresponds to the negative counter terminal Digital 1 0 USB 6525 has eight channel to channel optically isolated inputs P1 lt 0 7 gt and eight channel to channel optically isolated solid state relay outputs PO lt 0 7 gt P1 7 PFI 0 can also function as a 32 bit counter Refer to the Event Counter section for more information about the counter Optically Isolated Inputs The USB 6525 provides eight channels of isolated digital inputs These inputs consist of an optocoupler a depletion mode MOSFET based current limiting circuit and Schottky diode Each channel has its own positive and negative terminals The input range on the channels is 60 VDC to 60 VDC Sensing DC Voltages The USB 6525 detects a wide range of DC signals from TTL like logic levels to DC power supply levels up to 60 V
10. ments 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 National Instruments Corporation 13 USB 6525 User Guide and Specifications 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 e Pollution Degree 1 means no pollution or only dry nonconductive pollution occurs The pollution has no influence e Pollution Degree 2 means that only nonconductive pollution occurs in most cases Occasionally however a temporary conductivity caused by condensation must be expected e 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 f
11. ns 1 0 Connector The USB 6525 device ships with two detachable terminal blocks for digital signals Each individual terminal accepts a wire gauge between 16 AWG 28 AWG Table 1 Digital Terminal Assignments Module Terminal Signal Module Terminal Signal P0 0A 17 P1 0 2 P0 0B 18 P1 0 3 PO 1A E 19 P1 1 A 4 P0 1B 20 P1 1 Eal 5 P0 2A 21 P1 2 E 6 P0 2B 22 P1 2 7 P0 3A 5 23 P1 3 E 8 P0 3B lt 24 P1 3 i 9 P0 4A 25 P1 4 E 10 P0 4B H 26 P1 4 Ea 11 P0 5A 27 P1 5 E z 12 P0 5B 2 G 28 P1 5 z 13 P0 6A z S 29 P1 6 14 P0 6B y 30 P1 6 15 P0 7A 31 P1 7 PFI 0 16 P0 7B 32 P1 7 PFI 0 USB 6525 User Guide and Specifications ni com Signal Descriptions Table 2 describes the signals available on the I O connectors Table 2 Signal Descriptions Signal Name Direction Description P0 lt 0 7 gt A B Output Solid stat
12. or technical support At ni com support you have access to everything from troubleshooting and application development self help resources to email and phone assistance from NI Application Engineers A Declaration of Conformity DoC is our claim of compliance with the Council of the European Communities using the manufacturer s declaration of conformity This system affords the user protection for electronic compatibility EMC and product safety You can 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 Instruments corporate headquarters is located at 11500 North Mopac Expressway Austin Texas 78759 3504 National Instruments also has offices located around the world to help address your support needs For telephone support in the United States create your service request at ni com support and follow the calling instructions or dial 512 795 8248 For telephone support outside the United States contact your local branch office Australia 1800 300 800 Austria 43 0 662 45 79 90 0 Belgium 32 0 2 757 00 20 Brazil 55 11 3262 3599 Canada 800 433 3488 China 86 21 6555 7838 Czech Republic 420 224 235 774 Denmark 45 45 76 26 00 Finland 385 0 9 725 725 11 France 33 0 1 48 14 24 24 Germany 49 0 89 741 31 30 India 91 80 51190000 Israel 972 0 3 6393737 Italy 39 02 413091 Japan 81 3 5472
13. or 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 Operate the device at or below the Measurement Category I Measurement circuits are subjected to working voltages and transient 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 e Measurement Category I is for measurements performed on circuits not directly connected to the electrical distribution system referred to as MAINS voltage This 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 powered by regulated low voltage sources and electronics e 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 standa
14. rd 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 USB devices 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 USB 6525 User Guide and Specifications 14 ni com e 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 lt 1 000 V Examples include electricity meters and measurements on primary overcurrent protection devices and on ripple control units Where to Go for Support The National Instruments Web site is your complete resource f
15. rt 15 Emissions Class A Ay Note For EMC compliance operate this device according to product documentation USB 6525 User Guide and Specifications 12 ni com CE Compliance This product meets the essential requirements of applicable European Directives as amended for CE marking as follows e 73 23 EEC Low Voltage Directive safety e 89 336 EEC Electromagnetic Compatibility Directive EMC 3 Note Refer to the Declaration of Conformity DoC for this product for any additional regulatory compliance information To obtain the DoC for this product visit ni com certification search by model number or product line and click the appropriate link in the Certification column Waste Electrical and Electronic Equipment WEEE f EU Customers At the end of their life cycle all products must be sent toa WEEE recycling center For more information about WEEE recycling centers and National Instruments WEEE initiatives visit ni com environment weee htm Safety Guidelines UN 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 6525 Do not operate the USB 6525 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 Instru
16. using an external flyback diode to protect DC inductive loads and an MOV to protect AC inductive loads respectively Flyback Diode for DC Inductive Loads Inductive Load DC USB 6525 Figure 7 Contact Protection for DC Inductive Loads MOV for AC Inductive Loads i Inductive Load A Ve 2 USB 6525 PO xA Figure 8 Contact Protection for AC Inductive Loads USB 6525 User Guide and Specifications 8 ni com Using the USB 6525 as a TTL Output Device Figure 9 shows a signal connection example for a TTL level application with an external supply voltage of 5 V To External 5 V Supply i ee R 5 kQ i PO xA O O Vout PO xBi Isolated EE E E E Ground USB 6525 Figure 9 TTL Device Signal Connection Example When the SSR is open a small amount of current flows through R and the output voltage is close to 5 V a logic high When the SSR is closed current flows through R and the output voltage is close to 0 V a logic low Choose an R 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 R value of 5 KQ Event Counter You can configure PFI 0 an alias to P1 7 as the source for a 32 bit counter In this mode the device counts low to high transitions on P1 7 The counter can be armed and disarmed
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