background image

Figure 8. Connecting to the DIO Channels

NI USB-7856R OEM

Power

FPGA

Connector X/ DIO0

Connector X/ DIO1

Connector X/ DIO14

Connector X/ DIO15

1

2

1. Low-speed signal frequencies 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. Connectors 1 and 2 share the same voltage settings.

2. 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

NI USB-7856R OEM device 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-7856R OEM device to load a VI
when the system powers on. The VI can then set the DIO lines to any power-on state.

National Instruments recommends performing signal integrity measurements to test the effect
of signal routing with the cable and connection accessory for your application.

LEDs

If you are putting the NI USB-7856R OEM device in an enclosure, you can either seat the
optional lightpipes on the device or attach external LEDs, as described in the 

Attaching

External LEDs

 section. When the lightpipes are attached, the top row is Error, USB Ready,

and POWER LEDs, and the bottom row has the User LEDs.

The NI USB-7856R OEM device has six LEDs which reflect the device state.

Table 3. LED Descriptions

LED

Description

Location

 

 

 

POWER

Solid blue when the power is on

6

USB READY

Solid blue when the USB is ready

3

10 | NI USB-7856R OEM User Manual | ni.com

Summary of Contents for R Series

Page 1: ...arking compliance claims for NI USB 7856R OEM device The end product supplier is responsible for conformity to any and all compliance requirements Caution Do not operate the NI USB 7856R OEM device 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...

Page 2: ...erature 40 MHz OSC AO x8 USB NI ASIC Kintex 7 FPGA NI USB 7856R OEM Flash Memory DIO 5 V Reference DAC AO ADC AI CONNECTOR 1 CONNECTOR 2 CONNECTOR 3 CONNECTOR 0 Data Address Control AI x8 INA DIO x16 DIO x16 DIO x16 Overvoltage Protection Overvoltage Protection Overvoltage Protection 2 NI USB 7856R OEM User Manual ni com ...

Page 3: ...t manufacturers Table 1 NI USB 7856R OEM Device Components Components Reference Designator Manufacturer LEDs DS2 DS5 DS7 DS8 DS10 SunLED XZBB54W 1TN DS4 Everlight Electronic QTLP630C 2 T R USB connector J5 Tyco 292304 1 Power connector J1 J2 J9 Phoenix Contact 1727566 Power switch SW2 C K E101J1AQE2 The following table lists and describes the I O connectors on the NI USB 7856R OEM device Refer to ...

Page 4: ...nectors Connector Description Reference Designator Manufacturer AI AO 50 position header P2 3M N2550 6002RB DIO 34 position header J9 3M N2534 6002RB External LED 7 position header E1 FCI 68000 107LF 4 NI USB 7856R OEM User Manual ni com ...

Page 5: ... 72 72 2X 6 055 153 81 6 263 159 08 2X 6 675 169 55 119 3 02 000 0 2X 6 435 163 46 3X 285 7 24 3X 6 115 155 32 6 400 162 56 2 055 52 19 3 797 96 44 2X 5 838 148 29 000 0 0 285 7 24 NI USB 7856R OEM User Manual National Instruments 5 ...

Page 6: ...gs and three dimensional models Note The NI USB 7856R OEM device has plated mounting holes that can act as chassis ground Connecting the NI USB 7856R OEM Device The NI USB 7856R OEM device provides connections for eight analog input AI channels eight analog output AO channels and forty eight digital input output DIO channels as shown in Figure 2 6 NI USB 7856R OEM User Manual ni com ...

Page 7: ...GND AI7 AISENSE AO0 AO1 AO2 AO3 AO4 AO5 AO6 AO7 5V AI0 AIGND AI1 AIGND AI2 AIGND AI3 AIGND AI4 AIGND AI5 AIGND AI6 AIGND AI7 AIGND AOGND AOGND AOGND AOGND AOGND AOGND AOGND AOGND 5V 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 49 47 45 43 41 39 37 35 33 31 29 27 25 23 21 19 17 15 13 11 9 7 5 3 1 Analog Input The NI USB 7856R OEM device provides connections for eight AI ch...

Page 8: ...ct the positive voltage signal to the AI and the negative voltage signal to AI To connect grounded differential signals to the NI USB 7856R OEM device you must also connect the signal reference to AI GND Figure 5 Connecting Grounded Differential Signals to the NI USB 7856R OEM Device PGIA ADC AI NI USB 7856R OEM AISENSE AIGND Vcm V1 Overvoltage Protection AI Overvoltage Protection Overvoltage Prot...

Page 9: ...s an AO pin and AOGND pin to which you can connect a load Figure 7 Connecting a Load NI USB 7856R OEM AOGND LOAD AO DAC Digital I O The NI USB 7856R OEM device provides connections for 48 digital input output DIO channels Connector 1 Connector 2 and Connector 3 contains 16 low speed channels that can run up to 10 MHz signal frequencies Each connector has selectable logic levels that you can config...

Page 10: ...e you can configure the NI USB 7856R OEM device to load a VI when the system powers on The VI can then set the DIO lines to any power on state National Instruments recommends performing signal integrity measurements to test the effect of signal routing with the cable and connection accessory for your application LEDs If you are putting the NI USB 7856R OEM device in an enclosure you can either sea...

Page 11: ...onnect an external LED circuit to the device as shown in Figure 10 For example to connect an external USB READY LED use 7 as the positive connection 5 V and 3 and the negative connection To connect the remaining LEDs refer to Table 3 National Instruments recommends that you limit the current to 10 mA per LED You can limit this current by using external resistors as shown in Figure 9 Figure 9 Exter...

Page 12: ...he following figure shows the pins on the power switch and power circuitry Figure 11 Power Switch Shown in the On Position VDC Out 100 kΩ to Ground VDC In Switch 1 2 3 NC NC SW2 SW2 3 Power to Device J8 Power Connector 1 2 1 2 Connector J8 1 2 F1 ON ON 100 kΩ 100 kΩ The following table lists the pin locations and signal descriptions 12 NI USB 7856R OEM User Manual ni com ...

Page 13: ...connect the 5 V power terminals to analog or digital ground or any other voltage source on the NI USB 7856R OEM device 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 7856R OEM device without a USB connection to a hos...

Page 14: ... 7856R OEM device To collect data you must reconnect the NI USB 7856R OEM device 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 Worldwide Support and Services The National Instruments website is your complete resource for technical support At ni com support you have access to everything f...

Page 15: ...ted States visit the Worldwide Offices section of ni com niglobal to access the branch office websites which provide up to date contact information support phone numbers email addresses and current events NI USB 7856R OEM User Manual National Instruments 15 ...

Page 16: ...lp 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 legal export compliance for the National Instruments global trade compliance policy and ho...

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