RE22-121000 Temperature Controller – Made in Poland – internal view
TL;DR
- Opens the RE22-121000 temperature controller, a tiny Polish-made module with a four-digit display, four indicators and three buttons for industrial temperature stabilization.
- Inside, four laminate boards fit together with pin headers or soldered joints, and the design uses mostly SMD parts plus some through-hole components.
- An Atmega32 handles control, alongside a TEZ 2.5/D BREVE-FUFVASSONS Art 16009-9984 transformer, a 78M05 regulator, and individual LSD3155-20 display digits.
- The measurement section includes an LM358, HCF4051, TL431 and an unrecognized 2252A chip, while a programming port suggests the board could support a DIY project.
- Solder joints still carry flux residue, and one capacitor looks slightly swollen, though the module itself might still be workable.
Generated by the language model.
I’m always curious to see devices labelled ‘Made in Poland’, and this was no exception. This tiny module, featuring a four-digit display, four indicator lights and three buttons, is a temperature controller. According to the manufacturer, it is designed for use in the plastics industry, the food industry, drying processes and wherever temperature stabilisation is required.
The device works with resistance temperature sensors, thermocouples and standard analogue signals. Control can be carried out in a simple on/off mode with hysteresis or using a PID algorithm, the parameters of which can be set manually or selected automatically thanks to the auto-adaptation function. The relay output allows direct control of small loads, and settings can be password-protected. The unit is housed in an IP65-rated enclosure, powered by standard mains voltages.
We take a look inside to discover the secret of its compact design. The unit is composed not of a single board, but of four laminate boards, cleverly fitted together using pin headers or simply soldered together (the front panel with the base). Surface-mount components are primarily used, although through-hole components are also available.
The display consists of individual digits – LSD3155-20. The overall design appears fairly simple and does not contain any unusual components, such as a dedicated display driver with an I2C-style interface.
The whole unit is powered by a TEZ 2.5/D BREVE-FUFVASSONS Art 16009-9984 mains transformer. From what I can see, the power rating of this transformer is 2.0 VA and the voltage on the secondary side is 7.5 V.
In the power supply section, there is the ever-present 78M05 voltage regulator. The solder joints are a bit conspicuous because someone hasn’t cleaned up the flux. It’s present at every joint, which suggests it’s a factory residue.
The heart of the module is the Atmega32. This comes as no surprise; it is probably one of the most popular families of microcontrollers here. I was half expecting a PIC there, but judging by our forum, they are less well-known. Next to the Atmega, you can see four transistors for controlling the individual digits of the display. There is also a ULN2003 nearby – probably also for controlling the displays, or more specifically the segments. In the measurement section, I can see an LM358 (comparator), an HCF4051 (multiplexer), a TL431 (reference voltage) and a 2252A chip, which I don’t recognise. Any suggestions? I’m also surprised by the additional four transistors – there are eight in total.
That’s about it, really. Apart from the solder joints, a capacitor caught my eye; it looks slightly swollen, though the module itself doesn’t have a switching power supply, so this surprises me a bit more than usual. The whole thing could probably be got working; I can also see a programming port on the board, so you could build your own DIY project based on this module. The device manual is available online, so there’s no need to go into it here.
Have you used this type of controller?
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Comments
And it probably is. In the transformer housing. Because it's a transformer sticker. German. I would read it like this: "on the sticker it is drawn, that it is ". [Read more]
Just Breve is a mould from Lodz, so Poland. The transformer does not have a built-in fuse, this marking suggests that it should be protected with a fuse of the value given next to this symbol. [Read more]
Where does this information come from? IP65 is a dust- and waterproof enclosure, and you can see from the photos that it has large ventilation slots, the buttons are not sealed, similar to the connectors... [Read more]
The specifications (including IP65) are from the manufacturer's RE22 website. I can also give you the current price of the product by the way - £349. https://obrazki.elektroda.pl/8960129900_1775650072_bigthumb.jpg... [Read more]
https://obrazki.elektroda.pl/5847049500_1775651419_thumb.jpg Everything is in the specification when it comes to IP 20 from the contacts and IP 65 from the front. [Read more]
TLC2252 made by Texas Instruments, although you might want to make sure by checking the connections on the board. [Read more]
RE 22 briefly, I replaced it with an ER71 regulator. Out of several hundred units fitted, only one failure. So cheap and reliable. [Read more]