NI USB-7855R User Manual
Contents
1. Use individually shielded twisted pair wires to connect AI signals to the device With this type of wire the signal attached to the positive and negative inputs are twisted together and then covered with a shield You then connect this shield only at one point to the signal source ground This kind of connection is required for signals traveling through areas with large magnetic fields or high electromagnetic interference Route signals to the device carefully Keep cabling away from noise sources such as video monitors and analog signals Use the following recommendations for all signal connections to the NI USB 7855R Separate NI USB 7855R signal lines from high current or high voltage lines These lines can induce currents in or voltages on the NI USB 7855R signal lines if they run in parallel paths at a close distance To reduce the magnetic coupling between lines separate them by a reasonable distance if they run in parallel or run the lines at right angles to each other Do not run signal lines through conduits that also contain power lines Protect signal lines from magnetic fields caused by electric motors welding equipment breakers or transformers by running them through special metal conduits Mounting R Series USB Devices You can use your R Series USB device on a desktop mount it on a wall or mount it on a DIN rail Panel or Wall Mounting Complete the following steps to panel or wall mount your NI USB 7855R You ca2. 43 9 DGND GND 42 8 GND DIO6 42 8 DGND DIO24 41 7 DIO25 DIO5 47 DGND GND 40 6 GND DIO4 40 6 DGND DIO26 39 5 DIO27 DIO3 39 5 DGND GND 38 4 GND DIO2 38 4 DGND DIO28 37 3 DIO29 DIO1 37 3 DGND GND 36 2 GND DIOO 36 2 DGND DIO30 35 1 DIO31 5V 35 1 5V a Sy CONNECTOR 0 CONNECTOR 1 DIO MIO TERMINAL 34 TERMINAL 1 TERMINAL 34 TERMINAL 1 D D j T T T TERMINAL 68 TERMINAL 35 TERMINAL 68 TERMINAL 35 Connectivity Options Use the following connection accessories and cables to access the signals on the I O connectors NI USB 7855R User Manual National Instruments 3 Table 1 Connection Accessories and Cables Connector Accessory Accessory Cable Cable Type Description Description MIO NI SCB 68A A 68 pin NI SHC68 68 RMIO A shielded 782536 01 shielded I O 189588 01 1 meter or 68 conductor connector 189588 02 2 meter cable block DIO NI SCB 68 HSDIO A 68 pin NI SHC68 C68 RDIO2 A shielded 7829 14 01 shielded 156166 01 1 meter or digital I O high speed 156166 02 2 meter 68 conductor digital cable connector block Analog Input The NI USB 7855R provides connections for eight AI channels Each channel has an AI pin AI pin and AIGND pin to which you can connect both single ended or differential voltage signals Use the AISENSE pin to connect non referenced single ended signals Connecting Single Ended Voltage Signals To connect referenced singl
3. National Instruments 9 Figure 11 Attaching the DIN Rail Clip to the Backpanel Wall Mount LEDs The NI USB 7855R has six LEDs that reflect the device state Table 2 LED Descriptions Symbol LED Description 0 POWER Solid blue when the power is on lt gt USB READY Solid blue when the USB is ready O ERROR Solid red for error cases O USER1 Blue user defined 1 L USER O USER2 Blue user defined 2 L USER O USER3 Blue user defined 3 L USER The following figure shows the LEDs on the front panel of the NI USB 7855R 10 NI USB 7855R User Manual ni com Figure 12 NI USB 7855R Front Panel NATIONAL INSTRUMENTS Oe b CONNECTOR 0 RDIO CONNECTOR 1 RMIO peeks Gad ee OOO 6G O C000 NI USB 7855R 1 2 3 R Series Multifunction RIO user 5 V Power Source Use the 5 V terminals on the I O connector supply 5 V referenced to DGND to power external circuitry AN Caution Never connect the 5 V power terminals to analog or digital ground or any other voltage source on the NI USB 7855R or any other device Doing so can damage the device and the computer National Instruments is not liable for damage resulting from such a connection The power rating is 4 75 to 5 1 VDC at 0 5 A Autonomous Mode You can run the NI USB 7855R without a USB connection to a host computer using Autonomous Mode To collect data the NI USB 7855R acquires in Autonomou
4. ni com Figure 2 NI USB 7855R Pinout en GND 68 34 GND AlO 68 34 AlO GND 67 33 GND AIGNDO 67 33 AIGND1 GND 66 32 GND A 66 32 Al1 DIOO 65 31 DIO1 Al2 65 31 Al2 GND 64 30 GND AIGND2 64 30 AIGND3 DIO2 63 29 DIO3 Al3 63 29 Al3 GND 62 28 GND Al4 62 28 Al4 DIO4 61 27 DIOS AIGND4 61 27 AIGNDS GND 60 26 GND Al5 60 26 Al5 DIO6 59 25 DIO7 Al6 59 25 Al6 GND 58 24 GND AIGND6 58 24 AIGND7 DIO8 57 23 DIO9 Al7 57 23 Al7 GND 56 22 GND AISENSE 56 22 NC DIO10 55 21 DIO11 AOO 55 21 AOGNDO GND 54 20 GND AO1 54 20 AOGND1 DIO12 53 19 DIO13 AQ2 53 19 AOGND2 GND 52 18 GND AO3 52 18 AOGND3 DIO14 51 17 DIO15 AO4 51 17 AOGND4 GND 50 16 GND AO5 50 16 AOGND5 DIO16 49 15 DIO17 AO6 49 15 AOGND6 GND 48 14 GND AO7 48 14 AOGND7 DIO18 47 13 DIO19 DIO15 47 13 DIO14 GND 46 12 GND DIO13 46 12 DIO12 DIO20 45 11 DIO21 DIO11 45 11 DIO10 GND 44 10 GND DIO9 44 10 DIO8 DIO22 43 9 DIO23 DIO7
5. INSTRUMENTS Furthermore any changes or modifications to the product not expressly approved by National Instruments could void your authority to operate it under your local regulatory rules A N Caution To ensure the specified EMC performance operate this product only with shielded cables and accessories N Caution To ensure the specified EMC performance you must install the included snap on ferrite bead onto the DC power cord of the power supply as described in the getting started guide Hardware Overview The following high level block diagram represents the NI USB 7855R Figure 1 NI USB 7855R Block Diagram Overvoltage Protection CONNECTOR 0 DIO H DIO 40 MHz Flash OSC Memory Data NI ASIC Address Control Overvoltage MAI Kintex 7 E H Protection FPGA io g 5V FPGA 96 Overvoltage a Protection Reference Temperature Eep OS eo Taea 9 D 7 AO x8 i vervoltage ap lt A Protection DAC li AO Device Temperature NI USB 7855R Connecting the NI USB 7855R The NI USB 7855R provides connections for eight analog input AJ channels eight analog output AO channels and forty eight digital input output DIO channels as shown in Figure 2 2 NI USB 7855R User Manual
6. USER MANUAL NI USB 7855R R Series for USB Multifunction RIO with Kintex 7 70T FPGA Frangais Deutsch AAG b 0 fia ARP SC ni com manuals This document provides compliance pinout connectivity mounting and power information for the National Instruments USB 7855R Safety Guidelines Caution Do not operate the NI USB 7855R in a manner not specified in this user manual Product misuse can result in a hazard You can compromise the safety protection built into the product if the product is damaged in any way If the product is damaged return it to National Instruments for repair Electromagnetic Compatibility Guidelines This product was tested and complies with the regulatory requirements and limits for electromagnetic compatibility EMC as stated in the product specifications These requirements and limits are designed to provide reasonable protection against harmful interference when the product is operated in its intended operational electromagnetic environment This product is intended for use in residential commercial and industrial locations However harmful interference may occur in some installations or when the product is connected to a peripheral device or a test object To minimize interference with radio and television reception and prevent unacceptable performance degradation install and use this product in strict accordance with the instructions in the product documentation lt 7 NATIONAL
7. e ended voltage signals to the NI USB 7855R you must connect the voltage ground signal to AI GND in order to keep the common mode voltage in the specified range as shown in Figure 3 Figure 3 Connecting Referenced Single Ended Signals to the NI USB 7855R 1 Al a i Overvoltage Protection Ai PGIA ADC j S Overvoltage V4 a hd Protection oo z oy ooe 1 i oo i i pAISENSE __ Overvoltage Q Protection Hl i AIGND 7 e Connection L Accessory NI USB 7855R To connect non referenced single ended voltage signals to the NI USB 7855R you must connect the voltage ground signal to AI SENSE in order to keep the common mode voltage in the specified range as shown in Figure 4 4 NI USB 7855R User Manual ni com Figure 4 Connecting Non Referenced Single Ended Signals to the NI USB 7855R i 1 ot Ale a i Overvoltage i Protection i i i V 2G Vi i A ae PGIA ADC f toe Overvoltage hd Protection oo 1 i o oHe Vem iv i oo d i G AISENSE Overvoltage ad AIGND Protection 47 7 i i Connection i Accessory y 4 NI USB 7855R Connecting Differential Voltage Signals You can connect grounded or floating differential signal sources to the NI USB 7855R Connect the positive voltage signal to t
8. he AI and the negative voltage signal to AI To connect grounded differential signals to the NI USB 7855R you must also connect the signal reference to AI GND Figure 5 Connecting Grounded Differential Signals to the NI USB 7855R Alt i Overvoltage Protection i SA Vila f R sig PGIA ADC i i 1 Al Overvoltage 4 Protection F I ran ool Vem A eg i i hISENSE Overvoltage Q r Protection AIGND V i Connection L yZ NI USB 7855R Accessory To connect floating differential signals to the NI USB 7855R you must connect the negative and positive signals to AI GND through 1 MQ resistors to keep the voltage within the common mode voltage range If the voltage source is outside the common mode voltage range the NI USB 7855R does not read data accurately NI USB 7855R User Manual National Instruments 5 Figure 6 Connecting Floating Differential Signals to the NI USB 7855R Alt F Overvoltage Protection i f UA g Sg R pi PGIA ADC l i Al Overvoltage gt e Protection S Eo o ol rate Piel ee SENSE Overvoltage Protection AIGND V Connection i V NI USB 7855R Accessory Analog Output The NI USB 7855R provides connections for eight analog outp
9. n purchase the panel mounting kit at ni com with part number 781514 01 1 Use three 8 32 flathead screw to attach the backpanel wall mount to the panel or wall Tighten the screw with a 2 Phillips screwdrivers to a torque of 1 1 N m 10 1b in Place the NI USB 7855R on the backpanel wall mount with the signal wires facing down and the device bottom sitting on the backpanel wall mount lip While holding the NI USB 7855R in place attach the front bracket to the backpanel wall mount by tightening the two thumbscrews 8 NI USB 7855R User Manual ni com Figure 9 Wall or Panel Mounting the NI USB 7855R DIN Rail Mounting Complete the following steps to mount your NI USB 7855R You can purchase a DIN rail mounting clip at ni com with part number 781515 01 1 Fasten the DIN rail clip to the back of the backpanel wall mount using a 1 Phillips screwdriver and four machine screws Tighten the screws to a torque of 0 4 N m 3 6 lb in 2 Clip the bracket onto the DIN rail as shown Figure 10 DIN Rail Clip Parts Locator Diagram Pa 1 DIN Rail Clip 2 DIN Rail Spring 3 DIN Rail 3 Place the NI USB 7855R on the backpanel wall mount with the signal wires facing down and the device bottom sitting on the backpanel wall mount lip 4 While holding the NI USB 7855R in place attach the front bracket to the backpanel wall mount by tightening the two thumbscrews NI USB 7855R User Manual
10. ncies up to 10 MHz with logic levels configured as 1 2 V 1 5 V 1 8 V 2 5 V or 3 3 V 3 LED The DIO channels connect to the FPGA through buffers which have overvoltage and undervoltage protection as well as over current protection Refer to the NJ USB 7855R Specifications for more information about the maximum voltage and current When the system powers on the DIO channels are set as input low with pull down resistors To set another power on state you can configure the NI USB 7855R to load a VI when the system powers on The VI can then set the DIO lines to any power on state All the high speed DIO channels on Connector 0 are routed with a 50 Q characteristic trace impedance Route all external circuitry with a similar impedance to ensure best signal quality NI recommends performing signal integrity measurements to test the affect of signal routing with the cable and connection accessory for your application Field Wiring Considerations Environmental noise can seriously affect the measurement accuracy of the device if you do not take proper care when running signal wire between signal sources and the device The following recommendations mainly apply to AI signal routing to the device as well as signal routing in general NI USB 7855R User Manual National Instruments 7 Take the following precautions to minimize noise pickup and maximize measurement accuracy Use differential AI connections to reject common mode noise
11. or patents covering 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 You can find information about end user license agreements EULAs and third party legal notices in the readme file for your NI product Refer to the Export Compliance Information at ni com 1legal export compliance for the National Instruments global trade compliance policy and how to obtain relevant HTS codes ECCNs and other import export data 2013 National Instruments All rights reserved 375942A 01 Nov13
12. s Mode you must reconnect the NI USB 7855R to a host computer Caution Data is lost and is not recoverable upon reconnection if a DMA FIFO overflows while the NI USB 7855R is disconnected from the host computer or if the NI USB 7855R loses power at any point Autonomous Mode includes the following capabilities NI USB 7855R User Manual National Instruments 11 Table 3 Autonomous Mode Capabilities Capability Description Use the Open Close FPGA Call the Close FPGA VI Reference Function without Reference VI functions to run aborting or resetting the FPGA VI before you disconnect an FPGA VI and then the USB cable disconnect the USB cable After you disconnect the USB cable any VI running on the NI USB 7855R continues to run and collect data which can later be retrieved by reconnecting the USB cable and re opening the original FPGA reference Use Interactive Front Panel The front panel indicators stop updating Communication to run an After you disconnect the USB cable any VI running on the FPGA VI and then NI USB 7855R continues to run Restore the Interactive disconnecting the USB cable Front Panel Communication by reconnecting the USB cable Download the bitfile to flash Download the bitfile to flash memory and set it to run when memory and set it to run when loaded to FPGA The bitfile automatically starts running loaded to FPGA whenever power is applied to the NI USB 7855R To collect data
13. ut channels Each channel has an AO pin and AOGND pin to which you can connect a load Figure 7 Connecting a Load DAC LOAD Z Bodi 4 i Connection NI USB 7855R i Accessory Digital I O The NI USB 7855R provides connections for 48 digital input output DIO channels Connector 0 contains 32 high speed DIO channels that can run up to 80 MHz signal frequencies and Connector 1 contains 16 low speed channels that can run up to 10 MHz signal frequencies Each connector has selectable logic levels that you can configure as 1 2 V 1 5 V 1 8 V 2 5 V or 3 3 V You can configure each channel as input or output 6 NI USB 7855R User Manual ni com Figure 8 Connecting to the DIO Channels J 1 DIOO e b gt DIO1 J lt 3 o lt lt GH f i Connecter 0 DIO i i kos J i i DIO30 Q e e gt J H DIO31 lt oq q Connection Accessory i Leese eee nese i i FPGA i DIOO a I Q gt gt e gt ji 1 DIO1 H a lt _ weee i e Connecter 1 MIO i oe 1 1 DIO14 4 nd gt Power i ew D tl i i DIO15 a gt 4 Q od o4 osd i Connection i i H ccessory A i H A a a E eae ees NIUSB 809m 1 High speed signal frequencies up to 80 MHz with logic levels configured as 1 2 V 1 5 V 1 8 V 2 5 V or 3 3 V 2 Low speed signal freque
14. you must reconnect the NI USB 7855R to a host computer before powering off the device Refer to the LabVIEW FPGA Module Help for more information about downloading an FPGA VI to the flash memory Where to Go for Support The National Instruments Web site is your complete resource for 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 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 visit the Worldwide Offices section of ni com niglobal to access the branch office Web sites which provide up to date contact information support phone numbers email addresses and current events 1 The Host VI errors out if you do not call the Close FPGA VI Reference Function without aborting or resetting the FPGA VI Refer to the NI Trademarks and Logo Guidelines at ni com trademarks for information on National Instruments trademarks Other product and company names mentioned herein are trademarks or trade names of their respective companies F
Download Pdf Manuals
Related Search