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Seeking Your Interest in Roadtesting a Raspberry Pi Add-on Board for developing Ethernet-capable field devices

rscasny

Hi all. It's been awhile since I created a pre-roadtest discussion. It's good to be back. Let me tell you about this product.

As usual. I've been in discussion with a supplier about roadtesting an add-on board for the Raspberry Pi.  Ot's called the EVAL-CN0575-RPIZ. On a nutshell, the CN0575 is a platform for developing Ethernet-capable field devices and applications. More information follows.

I wanted to get your feedback on two questions:

  • What do you need to roadtest it?
  • How interested are you in roadtesting it?

Let me start at the beginning and give you some information about the board:

The EVAL-CN0575-RPIZ is a 10BASE-T1L MAC/PHY interface with Single Pair Power over Ethernet (SPoE) for development of field devices and applications on a Raspberry Pi platform board. The SPoE powered device (PD) and isolated flyback regulator provide 5 V power to the platform board and attached application circuitry. SPoE Class 12 (8.4 W, 24 V nominal) and Class 13 (7.7 W, 55 V nominal) are supported.

Designed for use on the Raspberry Pi platform, the CN0575 hardware features a 40-pin GPIO header, and follows the same mechanical dimensions as a standard HAT.

To allow board stacking and development of field device applications using Raspberry Pi HATs, an additional GPIO header with extended leads is included with each evaluation board. However, the CN0575 can also be used on its own as a basic temperature sensing field device with remote user input/output via an onboard button and LED.

image image image

Here is the documentation:

Datasheet

Circuit Notes

User Guide

For More Information

What do you need to roadtest this product?

I was reading through the circuit evaluation section of the user guide. It says that one needs the following equipment for testing:

  • EVAL-CN0575-RPIZ
  • EVAL-ADIN1100-EBZ
  • 24 V (Class 12) or 55 V (Class 13) power supply
  • Raspberry Pi computer (Model 3B+ or above)
  • Host PC (Windows/Linux/Mac)
  • CN0575 demo Python script
  • Plug-in screw-terminal connector
  • Single-pair of 18 AWG (max) wires
  • Category 5e Ethernet cable with RJ45 connectors
  • USB-A to micro-USB-B cable

Seems like a lot of gear. Do you need all this hardware or can you test it another way? I'm trying to determine what I would need to provide beyond the EVAL-CN0575-RPIZ.

Prospective RoadTest Poll

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  • Based on reading some of the documents above, SPE can use the same single pair, twisted, shileded cable used for RS485. Thumbsup  I've got a partial spool of that.
    To roadtest the board, I think one needs the following:

    • EVAL-CN0575-RPIZ
    • EVAL-ADIN1100-EBZ

    I don't think any of us would turn down a Raspberry Pi, if you threw one in, but I also think that many of us have one that could be pressed into service for the roadtest.

    The last component that might be needed is the SPoE Power Coupler.  I can't figure out if it's really needed or not.  The datasheet (page 6 of 7) shows it in the diagram but does not mention it in the instruction set for connecting the RPIZ to the ADIN1100.  I also can't find the component searching the Internet.

    You may want to inquire of the supplier if the AD-T1LUSB2.0-EBZ will also interface with the RPIZ.  This interface is supposed to come in the AD-SWIOT1L-SL kit (current roadtest Relaxed).  If it can, whomever is roadtesting the AD-SWIOT1L-SL might be able to talk to the RPIZ with it (or vice versa).

  • in reply to kmikemoo

    I had the same question about needing the SPoE coupler. You need it if you are using a C power supply. If you use USB , you don't.  https://wiki.analog.com/resources/eval/user-guides/circuits-from-the-lab/cn0575  Go to Basic Operation point #7

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