National Instruments R Series Bedienungsanleitung

USER MANUAL

NI USB-7856R OEM

R Series for USB Multifunction RIO with Kintex-7 160T FPGA

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This document provides dimensions, connectivity information, and pinouts for the National

Instruments USB-7856R OEM device.

Caution National Instruments makes no product safety, electromagnetic

compatibility (EMC), or CE marking 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 damaged, return it to National Instruments for repair.

Hardware Overview

The following high-level block diagram represents the NI USB-7856R OEM device.

Figure 1. NI USB-7856R OEM Device Block Diagram

Device

Temperature

Overvoltage

Protection

Overvoltage

Protection

FPGA

Temperature

40 MHz

OSC

AO (x8)

USB

NI ASICKintex-7

FPGA

NI USB-7856R OEM

Flash

Memory

DIO

+5 V

Reference

DAC AO

ADC AI

CONNECTOR 1 CONNECTOR 2 CONNECTOR 3CONNECTOR 0

Data/

Address/

Control

AI (x8)

INA

DIO (x16)

Overvoltage

Protection

Overvoltage

Protection

Overvoltage

Protection

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

Parts Locator

1. USB Connector

2. Power Supply Connector

3. Power Switch

4. External LED Attachments

5. Connector 0 (Analog)

6. Connector 1 (Digital)

7. Connector 2 (Digital)

8. Connector 3 (Digital)

NI USB-7856R OEM Device Components

The following table lists the interfacing components on the NI USB-7856R OEM device and

the component 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 the connector manufacturer for information about using and matching these

connectors.

NI USB-7856R OEM User Manual | © National Instruments | 3

Table 2. NI USB-7856R OEM Device Connectors

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

Dimensions

2X .175 (4.45)

2X 2.863 (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

5.830 (148.08)

2.688 (68.28)

6.500 (165.1)

3.812 (96.82)

Note Visit ni.com/dimensions for more information about the dimensions of

the NI USB-7856R OEM device, including two-dimensional drawings 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

Figure 2. NI USB-7856R OEM Device Pinout

DIO0

DIO1

DIO2

DIO3

DIO4

DIO5

DIO6

DIO7

DIO8

DIO9

DIO10

DIO11

DIO12

DIO13

DIO14

DIO15

GND

Connector 1

DIO0

DIO1

DIO2

DIO3

DIO4

DIO5

DIO6

DIO7

DIO8

DIO9

DIO10

DIO11

DIO12

DIO13

DIO14

DIO15

GND

Connector 3

GND

DIO0

DIO1

DIO2

DIO3

DIO4

DIO5

DIO6

DIO7

DIO8

DIO9

DIO10

DIO11

DIO12

DIO13

DIO14

DIO15

GND

Connector 2

Connector 0

AI0-

AIGND

AI1-

AIGND

AI2-

AIGND

AI3-

AIGND

AI4-

AIGND

AI5-

AIGND

AI6-

AIGND

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

+5V 50

Analog Input

The NI USB-7856R OEM device 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 single-ended voltage signals to the NI USB-7856R OEM device, 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-7856R OEM Device

PGIA ADC

AI+

NI USB-7856R OEM

AISENSE

AIGND

–

Overvoltage

Protection

AI– Overvoltage

Protection

Overvoltage

Protection

NI USB-7856R OEM User Manual | © National Instruments | 7

To connect non-referenced single-ended voltage signals to the NI USB-7856R OEM device,

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.

Figure 4. Connecting Non-Referenced Single-Ended Signals to the NI USB-7856R OEM Device

PGIA ADC

AI+

NI USB-7856R OEM

AISENSE

AIGND

Vcm

–

Overvoltage

Protection

AI– Overvoltage

Protection

Overvoltage

Protection

–

Connecting Differential Voltage Signals

You can connect grounded or floating differential signal sources to the NI USB-7856R OEM

device. Connect 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

–

Overvoltage

Protection

AI– Overvoltage

Protection

Overvoltage

Protection

–

To connect floating differential signals to the NI USB-7856R OEM device, you must connect

the negative and positive signals to AI GND through 1 MΩ 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-7856R OEM device does not read data accurately.

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

Figure 6. Connecting Floating Differential Signals to the NI USB-7856R OEM Device

PGIA ADC

AI+

NI USB-7856R OEM

AISENSE

AIGND

–

Overvoltage

Protection

AI– Overvoltage

Protection

Overvoltage

Protection

1 MΩ

Resistor

1 MΩ

Resistor

Analog Output

The NI USB-7856R OEM device provides connections for eight analog output channels. Each

channel has an AO pin and AOGND pin to which you can connect a load.

Figure 7. Connecting a Load

NI USB-7856R OEM

AOGND

LOAD

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

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.

NI USB-7856R OEM User Manual | © National Instruments | 9

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. 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

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