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sbRIO-96XX series DIO/MIO Breakout and Development Board

Overview

This Breakout and Development Interface Board is designed for the NI single Board sbRIO-9623 through 9636.   It provides easy access to the DIO/MIO channels which simplifies developing custom sbRIO applications.   Table 1 show the sbRIO devices which can be used with the Breakout Interface Board. We have used this interface board to develop several medical and industrial products. It is a key component in developing our RF-related projects.

 

 

 

 

NI sbRIO Device

DIO

AI

AO

RMC

sbRIO-9623

4

16ch-12bit

4ch-12bit

1

sbRIO-9626

4

16ch-16bit

4ch-16bit

1

sbRIO-9633

28

16ch-12bit

4ch-12bit

X

sbRIO-9636

28

16ch-16bit

4ch-16bit

X


Table 1.  Breakout Development Board for sbRIO Devices

 

 

Introduction

NI single board sbRIO-9623 through 9636  are provided with 50-pin IDC header connectors designated as DIO ”J502” and MIO ”J503”  (see sbRIO operating instructions and specification manual for detail) with direct access to built-in 16 channels analog input, 4 channels analog output and 4 to 28 digital I/O lines (see table 1).  The sbRIO-9623 and 9626 also include a RIO Mezzanine Card (RMC) connector that can be combined with NI 9693 two-slot C series RIO Mezzanine card for a flexible and fast prototyping of embedded systems. The Breakout board is a direct-mate to DIO/MIO connectors or can be connected to sbRIO device via 50-pin ribbon cable with IDC header.   In direct-mate mode (Fig-1) the Breakout board sits on top of the sbRIO without interfering with any of the I/O ports.  In ribbon-cable mode, the Breakout board is separate from sbRIO which provides the most flexibility when working on a bench (Fig-2).

 

 

  Fig-1_50.png

  

Figure 1. Breakout Interface Board direct connection to sbRIO Device

 

 

 

 

Fig-2_50.png

 

   Figure 2:  Breakout Interface Board connection via ribbon cable

 

 

 

 

 

Quick Prototyping with the Breakout Interface Board

Quick prototyping is accomplished by using two separate bread boarding areas for analog and digital circuits.  All analog and digital lines are available through 9 terminal blocks. These blocks are distributed around the edges of the PCB assembly.   You can also access the same signals through 9 socket strips with standard 0.1” spacing running parallel to the terminal blocks.

 

 

Breadboard vs Proto-board

Bread boarding allows quick and solderless circuit development using inexpensive mini modular Breadboard such as sparkfun “PRT-11660” which can be mounted directly over the prototyping areas.   However, proto boarding areas are double sided PCB with separate analog and digital internal ground plane layer.  Each area is approximately 1.8” long and 1.4” wide with 204 plated through holes that can be used for permanent circuit prototyping.   Figure 3 shows the Breakout Interface Board with proto boarding areas and other features highlighted, Figure 4 shows the Breakout Interface Board with optional mini module breadboards installed.

 

 

Fig-3_50.png

 

   Figure 3: The Breakout Interface Board with Proto-board sections highlighted

 

 

 

 

Fig-4_50.png

    

   Figure 4: The Breakout Interface Board with mini modules breadboards

 

 

 


The Design behind the Breakout Interface Board (Schematic Design using Multisim)

Creating custom symbol and footprint is an easy task using Multisim’s component wizard. We used this feature to create a 50-pin IDC connector since we have an older version of NI Design Suite. The latest version of Multisim provides a large collection of schematic symbols and footprints for National Instruments DAQ devices including single board’s IDC and RMC connectors. The Breakout Interface Board includes power for both analog and digital sections.   A dual voltage entry with 3-pin terminal block for analog circuitry and +5Vdc which is provided by the DIO (J502) connector of sbRIO-9633 and 9636.  We have also included a fast acting 2Amp fuse to protect the sbRIO’s internal power supply.   Figure 5 and 6 are portions of the schematic for DIO/MIO connectors and the power entry section of the design.

 

 

 

Fig-5.png

 

   Figure 5: Schematic Diagram of DIO/MIO connectors circuit

 

 

 

 Fig-6.png

 

  Figure 6. Schematic Diagram of Internal / External Power Entry Circuits

 

 

 

 

Board layout Design using Ultiboard

The integrated environment of the NI design suite allows for quick transfer of the schematic’s netlist for routing the board.  The Breakout Interface Board is approximately 6.2X3.1 inch and directly mates with the sbRIO DIO/MIO connectors. It can be secured by using six 7mm standoff with M3 screws.  This board will not interfere with other I/O connectors on the sbRIO.

 

The Breakout Interface Board is a four layer board that was manually routed since we were interested in keeping the analog section separate from the digital section. An internal layer was assigned as a grounding plane with split analog and digital sections.  The “Split copper” feature of Ultiboard made it easy to quickly accomplish this critical task.     Figure 7 shows the screenshot of top layer and Figure 8 the split grounding plane.

 

 

 

Fig-7.png

 

   Figure 7: Screenshot of the board's top layer

 

 

 

Fig-8.png

   Figure 8: Split Analog and Digital Ground plane

 

  

 

The teardrop feature of Ultiboard is quite useful when routing fine trace lines to a connector. This guarantees better pad connection to congested areas such as around IDC or RMC connectors. Figure 9 shows the teardrop connections to these DIO/MIO connectors. Added silkscreen on the solder side clearly identifies all input / output signals for ease of use (Figure 10).

 

 

Fig-9.png

   Figure 9: Teardrop feature ensures better connectivity

 

 

 

 

Fig-10_Sng_50.png

  

Figure 10: Solder side silkscreen showing signals name 

 


Another nice feature of the Ultiboard is the 3D view of the final design. This helps with the visual aspect of mechanical design such as component height, width or just a general view of the final design.  Figure 11 is a 3D view of the Breakout Interface Board. Figure 12 shows an example for quick bread boarding using modular breadboards described above. The sbRIO-9626 in this example also has two C-series modules connected through NI-9693 interface board.

 

 

 

 

Fig-11.png

 

   Figure 11: 3D view of the Breakout Interface Board

 

 

 

 

Fig-12_50.png

   Figure 12: Example of quick bread boarding with direct plug-in connection

 

 

 

 

 

Related Links:

 

 

 

 

 

 

 

Comments
FrankyCam
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Member
on

Very nice.

Do you sell it?

MikeNasab
Member
Member
on

Quoting FrankyCam <web.community@ni.com>:

FrankyCam https://decibel.ni.com/content/people/FrankyCam 

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