If I use a 10cm wide backbone I have room for a 2×30 (or 3×30) by 2.54 pitch “bus” that could contain the following Inventory: Summarised this gives me: 4 pin 5V PSU (5-10A) 4 pin 12V PSU (5-10A) 4 pin 24V PSU (5-10A) 4 pin 48V PSU (5-10A) 4 pin GND 5V 4 pin…
The more I look for any real standards within PLC the more I get the impression that they either do not exist or is not used. This is consistent with what automation engineers tell me. I was kind of getting my hopes up with “Industry 4.0”, but well… lets crack on with creating our own.
The first PLC module I want to make is a box that can hold Raspberry PI + 1 or 2 Hat’s. Having the capability to add a RPI 3 or RPI Zero W is a great asset. It also provide a solution for industrial mounting of a RPI. This enables 4 PLC modules “as is”:…
Maxim Integrated have started a PLC series called “Micro PLC” – the boards have a similar concept with STM32 at core and a backbone bus – except for that I don’t know much about them. It is a cute concept. The system have several boards, the one above is quad channel analogue input. . I get…
The blog entries show how Plain VM/Assembly evolved, but they can be a bit confusing to read stand-alone. So, I need to clean-up the content here a bit. The exercise now is to write up Plain Assembly Reference, Plain VM Reference and make sure the two documents are synchronized and consistent. I had a working…
I see a lot of schematics and people who struggle with getting a STM32 working. I have only been working with F0, F1 and F4, but these SoC (System on Chip) MCU’s are dead easy to get working. Basically they have internal oscillators so they only need 3.3V power. The F4 range also need VCAP…
This is a STM32F1xxRx prototype board I made for my own usage. I will update with VCAP capacitors for F405 and see if I can produce some of them in F103, F105, F107 and F405 format. I was very annoyed as I got this one because I realized I had sent in revision 1.0 while…
I have worked far to long with 19″ cabinets and things you mount from front, so what I am thinking is a micro-version of a rack system. We box each electronic module with a backbone plug and custom front connectors. We then plug them in, wire using standard wiring (that we probably have to create)…
Finding a standard project box for PLC is not difficult. The box above is available from 1.5 GBP and up on ebay. They have a standard click on system in the back for wall mounting and opening on the sides for connectors. This is quite popular within automation that mount these side by side and…
Just an early block diagram with some ideas. I plan a backbone bus with Power, Control, Data and Address pins. No MCU on the backbone, but should be clickable into PSU modules at each end + be extendable by 4+4+4… A motheboard with Ethernet, Wifi as a GW to normal network using the same form-factor…