National Instruments NI USB-7845R User Manual Download | Manualshive

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background image

Figure 2. NI USB-7845R OEM Device Pinout

DIO0

DIO1

DIO2

DIO3

DIO4

DIO5

DIO6

DIO7

DIO8

DIO9

DIO10

DIO11

DIO12

DIO13

DIO14

DIO15

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

1
3
5
7
9

11
13
15
17
19
21
23
25
27
29
31
33

2
4
6
9

10
12
14
16
18
20
22
24
26
28
30
32
34

Connector 1

DIO0

DIO1

DIO2

DIO3

DIO4

DIO5

DIO6

DIO7

DIO8

DIO9

DIO10

DIO11

DIO12

DIO13

DIO14

DIO15

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

1
3
5
7
9

11
13
15
17
19
21
23
25
27
29
31
33

2
4
6
9

10
12
14
16
18
20
22
24
26
28
30
32
34

Connector 3

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

7
9

11
13
15
17
19
21
23
25
27
29
31
33

9

10
12
14
16
18
20
22
24
26
28
30
32
34

DIO0

DIO1

DIO2

DIO3

DIO4

DIO5

DIO6

DIO7

DIO8

DIO9

DIO10

DIO11

DIO12

DIO13

DIO14

DIO15

GND

1
3
5

2
4
6

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

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-7845R 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-7845R 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-7845R OEM

Device

PGIA

ADC

AI+

NI USB-7845R OEM

Connection

Accessory

AISENSE

AIGND

V

1

+

–

Overvoltage

Protection

AI–

Overvoltage

Protection

Overvoltage

Protection

NI USB-7845

R

OEM User Manual

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© National Instruments

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Summary of Contents for NI USB-7845R

Page 1: ...arking compliance claims for NI USB 7845R OEM device The end product supplier is responsible for conformity to any and all compliance requirements Caution Do not operate the NI USB 7845R 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 7845R 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 com NI USB 7845R OEM User Manual ...

Page 3: ...t manufacturers Table 1 NI USB 7845R 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 7845R 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 com NI USB 7845R OEM User Manual ...

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 7845R OEM User Manual National Instruments 5 ...

Page 6: ...gs and three dimensional models Note The NI USB 7845R OEM device has plated mounting holes that can act as chassis ground Connecting the NI USB 7845R OEM Device The NI USB 7845R 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 com NI USB 7845R OEM User Manual ...

Page 7: ...ENSE 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 7845R OEM device provides connections for eight AI channels Each...

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 7845R OEM device you must also connect the signal reference to AI GND Figure 5 Connecting Grounded Differential Signals to the NI USB 7845R OEM Device PGIA ADC AI NI USB 7845R OEM Connection Accessory AISENSE AIGND Vcm V1 Overvoltage Protection AI Overvoltage Protec...

Page 9: ... AOGND pin to which you can connect a load Figure 7 Connecting a Load NI USB 7845R OEM Connection Accessory AOGND LOAD AO DAC Digital I O The NI USB 7845R 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 ...

Page 10: ... 7845R 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 7845R OEM device in an enclosure you can either seat the optional lightpipes on t...

Page 11: ...mple 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 External LEDs External LED 5 V OEM On Board 7 6 1 External Resistor Figure 10 A...

Page 12: ...ference designator F1 The VDC is the voltage provided by the power supply through pin 2 of the power connector reference designator J8 and must be 9 V to 30 V 20 W 2 VDC Out Provides power to the circuitry on the NI USB 7845R OEM device When the switch is in the on position the VDC power supply from pin 1 is routed to pin 2 3 100 kΩ to Ground Connects pin 2 to ground through a 100 kΩ resistor when...

Page 13: ...e 1 After you disconnect the USB cable any VI running on the NI USB 7845R OEM device 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 Communication to run an FPGA VI and then disconnecting the USB cable The front panel indicators stop updating After you disconnect the USB cable any VI...

Page 14: ...one support outside the United 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 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 ...

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