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Table of Contents

Can I …?

How can

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I implement

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an Emergency stop on the RevPi

have take a look at the follwing following link : https://revolutionpi.com/forum/viewtopic.php?t=3851

Can I get the 14-pin connector of the DIO module?

Our connector in the colour color gray is a special production. The same connector in black or green is available from Phoenix Contact.

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  • The Revolution Pi Connect SE module works and is not affected by the polarity reversal because it has a galvanically isolated power supply.

  • If individual IO modules are connected with reversed polarity, this can lead to destruction.

  • Have Take a look at Video Tutorial #12 – Controlling the Digital IO Modules with the PiBridge. There it is explained why a short circuit can occur due to the polarity reversal of individual modules. https://revolutionpi.com/tutorials/video-tutorials/#VT12

  • It certainly couldn't be the USB cable. A USB2 port does not bring the current that would be needed, USB2 sources shut down at more than 500mA, except chargers and power packs. So, no, a IO module was incorrectly polarized.

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Can I use 868 MHz with a LoRa antenna?

More or loss – have take a look at Using ISM Interface for Wireless M-Bus.
There is unfortunately no process image integration out of the box. But you are free to implement it yourself.

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Unfortunately, it is not possible to keep the relay contact open when the Power is off: the RevPi connect is equipped with a relay that is normally closed by default. See here: (8) Relay contact is closed when a device power is off - Revolution Pi Forum

How to configure output relay

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behavior on Connect SE?

Have Take a look at the following link: https://revolutionpi.com/forum/viewtopic.php?t=4111

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Yes, however, it will not boot with the CM4 device tree. https://revolutionpi.com/forum/viewtopic.php?t=3885#p13953

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Would it be possible to expand the number of USB ports on a RevPi Core with a USB HUB?

Yes, that is possible. However, please keep in mind that all connected devices share a USB root port (i.e. in total only the single USB2 bandwidth is available).

The network port is also connected to the internal USB hub.

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Would it be possible to use a cable extender instead of the default RevPi Connector?

The Revolution Pi products as well as expansion modules such as IO or gateways must be connected with the default RevPi Connector Bridge we have provided for this purpose so that the runtimes are not affected. Otherwise, there may be miscommunications between the modules.

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Are there 3D models of the enclosures of the RevolutionPi Revolution Pi devices?

Yes, in the download area you can download 3D data in the form of STEP data: https://revolutionpi.com/tutorials/downloads/?noredirect=en_US#stepdaten

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Is there a more industrial way than the USB port on the front of the RevolutionPi Revolution Pi Core to run a Modbus master on the Core?

The RevolutionPi Revolution Pi Connect has a separate RS485 port that you can configure as a Modbus master. With the Core variant, you only have the option of doing this via USB.

Is there a small UPS for the RevolutionPiRevolution Pi?

Without giving a rating, there are good experiences, for example with these products: https://www.phoenixcontact.com/de-de/produkte/unterbrechungsfreie-stromversorgung-usv

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Is there an external clock for the RTC in the RevolutionPi Revolution Pi Core3 (+)?

Yes, an RTC is installed in the RevolutionPi Revolution Pi Core devices. The system time is buffered for 24 hours without an external power supply. This was implemented with the use of a SupercapacitorSuper capacitor.
https://revolutionpi.com/revpi-core-part-1/?noredirect=en_US

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https://revolutionpi.de/forum/viewtopic.php?t=3667

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Would it be possible to connect a 3,3V to RS232 level converter somewhere on the Connect+ and have a serial port available as a console or a service port for our background service?

No, the RevPi Connect/+ has a RS485 interface which uses 5 volts. Have Take a look at this discussion:

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Are there older schematics of the RevolutionPi Revolution Pi Connect?

Yes, they are available here:

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Code Block
languagebash
#LED A1 green + relay contact active
piTest -w RevPiLED,33

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Would it be possible to bypass the reverse polarity protection of individual RevPi products?

Yes, unfortunately this affects the RevPi Core series (1, 3, +) Hardware-Revison: 1.0

  • in combination with other modules, if a device is connected with reverse polarity

  • in combination with different ground potentials between HDMI and the supply at X4

Have Take a look at https://youtu.be/Z5ddb0diOMY?t=80

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Is there any way to get the ConBridge connector by myself? Are there mating connectors?

  • The item is a specially moulded molded connector for KunbusKUNBUS.

  • There are no wire-to-board mating connectors.

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  • Unfortunately no, currently the CM3 based RevPi Modules just have one HDMI port.

  • Surely, it will change in the future with a RevPi based on CM4.

I have

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noticed that the watchdog can work separately from the RevPi OS, and my goal is to create a program to manage the watchdog. It is possible?

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We generally always have plastic housings without additional shielding. Additional shielding is normally not required with proper hardware design. The immunity complies with EN 61000-6-2 Immunity standard for industrial environments.

What are the voltage ranges in which a logical high signal and logical low signal are

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recognized?

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I want to write x MB/day to the eMMC, what is the lifetime using an ext4 filesystemfile system?

Samsung's eMMC components are installed in the Compute Module. Samsung does not specify the number of erase/write accesses for the chip in the data sheet, nor a lifetime in operating hours. Typically, eMMCs have eMMC has a guaranteed lifetime of approx. 10,000-30,000 write accesses for each individual cell. Experience shows that the real achievable cycle numbers of flash memories are significantly higher – due to the wide range of controller technologies used with wear levelling etc. According to the data sheet, the Samsung eMMC has a flash transition layer with wear levelling, bad block management and ECC. How far you can get without data loss is very difficult to calculate… We do not know of any failures with it so far.

The form factor of the RevolutionPi Revolution Pi Core / Connect devices is a bit too high for my control cabinet, are there any alternatives?

the The RevPi Core 3+ and RevPi Connect+ with the associated expansion modules and gateways are designed for the typical form factor in industrial control cabinets.

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  • The "PR100304R00 - 1.0 version" contained two power supply modules. These were combined in the "PR100304R01 - 1.1 version" into one galvanically isolated power supply unit. For this reason, the 8-pin X4 connector (at the bottom of to the RevPi Connect) has been changed to a 4-pin connector. The bridge for the watchdog is still pre-assembled.

  • The RS485 interface is now galvanically isolated with version “PR100304R01 – 1.1 version”.

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Hardware options

  • DI/DIO/MIO-Modul Module plus RevolutionPi Revolution Pi Core or RevolutionPi Revolution Pi Connect

  • RevolutionPi Revolution Pi Compact Module

Configuration options

I need details about PiBridge communication and pinout for a project. Where can I find

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details?

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