Here is some feedback after I finally have had my hands on a Laumas TLS unit.
The manual is not very good (that is my opinion). Not as bad as I have seen, but far from being good.
Fortunately there are not that many parameters to mess with, so I quickly managed to find the right parameters and set it up.
The unit itself is as one will expect when one knows it is a printed circuit board repackaged somewhat into a DIN-rail mountable unit.
The unit is quite low-cost so we are sort-of satisfied with what we get.
I am a bit disappointed about its functionality though.
There are 4 terminal positions to connect load cells. Each position can connect a single load-cell, or op to 4 via an external summing box (for 16 in total).
The disappointing bit is that these 4 positions for attaching load cells do not mean there are 4 separate channels. It seems that there is simply an integrated summing box under the skin. I would have liked (expected actually) that I could get error signals for each channel, and that I could monitor each channel individually on the display. That would have been great for troubleshooting.
As the manual explains, if a load-cell is bad, you have to disconnect them all and start hunting the error with a meter.
So all in all, it works OK and the price is fine for what you get. But I would have liked to pay a bit more to get a bit more.