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Can I get the 14-pin connector of the DIO module?
Our connector in the color colour gray is a special production. The same connector in black or green is available from Phoenix Contact.
Can I operate a thermocouple on a Revolution Pi module, i.e., an AIO module?
No, unfortunately not.
Can I expand the RevPi's internal memory with an SSD or
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NVMe?
We do not currently offer memory expansion on any of our units except via USB.
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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.
Take Have 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 – take have 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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Both UV1 & UV2, are only available on DI and DIO, as these come from the input IC (MAX31913 - – datasheet S10).
https://revolutionpi.de/forum/viewtopic.php?f=3&t=2653
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| Note |
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If this leads to errors, we cannot support this. |
Is the DIO capable of driving inductive loads without causing damage, or must
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freewheeling diodes be used?
Yes, it is possible. for For example: there are already customers who operate relays on RevPI RevPi and have no problems because the currents are not really high. On the load side, the situation is different; if necessary, snubbers or (filters) should be used to intercept the high switching currents. But it always depends on the consumer.
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Is there a recommendation for a small UPS in DIN rail format?
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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The RevolutionPi 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 RevolutionPi
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?
Without giving a rating, there are good experiences, for example with these products: https://www.phoenixcontact.com/de-de/produkte/unterbrechungsfreie-stromversorgung-usv
https://revolutionpi.de/forum/viewtopic.php?p=12692#p12701
I am interested in
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Bluetooth Low Energy 5 with the RevPi
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– is there any information?
With the next generation of our RevPi's, based on the CM4, there will be variants with built-in WLAN/BT. The RF chip CYW43455 used on the CM4 supports BT 5 and BLE. It is the same as on the Raspi Raspberry Pi 3B+ and 4. You can find the corresponding datasheet here: https://www.cypress.com/file/358916/download.
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The performance, such as cycle time, is highly dependent on the respective application!
Is the input on RevPi Connect +
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PNP or
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NPN?
it It is correct, the input on the RevPi Connect + is pnp PNP type.
The output on the RevPi Connect + is a relay.
Here you will find Circuit circuit diagrams:
https://revolutionpi.com/tutorials/downloads/#schaltplaene
In case you would have a npn NPN application, you could use an inverter, e.g. https://de.rs-online.com/web/p/interface-relaismodule/5329980?cm_mmc=DE-PLA-DS3A-_-google-_-CSS_DE_DE_Relais_Whoop-_-(DE:Whoop!)+Interface+Relaismodule-_-5329980&matchtype=&pla-318322060955&gclid=Cj0KCQiA0eOPBhCGARIsAFIwTs5mWkjR8cCSNfk1okM7xPLwRBIBFeaWUIbY6Czh6h6bFlf7szvrsRIaAh1lEALw_wcB&gclsrc=aw.ds
Is there a practical example of how to use the relay contact of the RevPi Compact?
https://revolutionpi.de/forum/viewtopic.php?f=3&t=2959#p10592
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Is there any way to get the ConBridge connector by myself? Are there mating connectors?
Item The item is a specially molded moulded connector for Kunbus.
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 seen 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?
https://revolution.kunbus.de/forum/viewtopic.php?f=18&t=2844#p10344
https://kunbus-gmbh.atlassian.net/servicedesk/customer/kb/view/651132931
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It depends on what you want to control. If you want would like to control devices connected via the PiBridge you can read the performance of the PiBridge.
Look at the variable RevPiIOCycle: https://revolutionpi.com/pictory-neues-revpi-core-v1-2-jessie/?noredirect=en_US
But the value is in the MS range.
The only exception is the RevPi Compact module, which is not modular and therefore has a much higher performance: https://revolutionpi.com/tutorials/digitale-ein-und-ausgaenge-compact/
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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 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 leveling levelling etc. According to the data sheet, the Samsung eMMC has a flash transition layer with wear levelinglevelling, bad block management and ECC. How far you can get without data loss is very difficult to calculate... calculate… We do not know of any failures with it so far.
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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 the connectto 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 - “PR100304R01 – 1.1 version"version”.
The power supply unit is not included in the scope of delivery, which one should I use?
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Of course, you can also use another 24 V power supply unit, but make sure that the 24 V is applied < 30 ms, ; otherwise an error may occur in combination with other modules.
https://revolution.kunbus.de/forum/viewtopic.php?f=3&t=1655&p=6759&hilit=ramp+up#p6759
I would like to use encoders, what to consider?
Hardware options
DI/DIO/MIO-Modul plus RevolutionPi Core or RevolutionPi Connect
RevolutionPi Compact Module
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No, this is not being developed. You are welcome to develop your own alternative connector, but we will not guarantee interference-free communication via the PiBridge. Keyword: EMC, length of cable, signal quality, (There is a reason why "only" up to 5 modules can be attached on each side).
Has the RevPi Compact been certified and tested according to the EN 61000-6-3 standard, which is necessary for the B2C market?
Yes, according to the EMC test report. However, we only issue this report upon request.
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Yes, when switching on the system, there is a "startup delay time", this is between min. 60s and max. 180s.
After this time comes the actual "watchtdog watchdog timeout period", which is also min. 60s and max. 180s.
So the first time (power up) the times add up, after that only the timeout period time is left.
More details can be found in the datasheet of the watchdog module MAX6370:
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