Mine arrived yesterday,
It’s a “Vango” V9881D (link to datasheet http://www.vangotech.com/tw/uploadpic/152783461494.pdf)
the rs485 transceiver is a Maxim MAX485 (link to datasheet https://datasheets.maximintegrated.com/en/ds/MAX1487-MAX491.pdf). The spec of a MAX485 is a “whole unit” so there would only be a maximum of 31 of these (plus a master) in a single rs485 chain (without repeaters).
the isolation is done by a pair of CT Micro CT817C’s (link to datasheet │CT Micro International Corporation│)
there is also a “S9111 ADAC2” that I didn’t find any info on, but it’s position and tracks lead me to suspect it might have something do with creating the 5v DC supply.
I haven’t hooked up to a load yet, but I did try communicating with just the rs485 and 240v connected and it seems to communicate fine with the “one to one” windows utility in the zip posted earlier in this thread.
The terminal blocks are a tad el cheapo (as expected) but aside from that it seems “ok” build wise. However IMO the connection map on the underside can be a bit misleading as it is correct whilst looking at the underside, but it needs inverting when looking at the module from the top which is where the terminal screws are (despite the map possibly suggesting otherwise), that’s not an issue when the unit is loose in your hand, but if mounted and you’re using an online map or looking at another unit, you could get it wrong.
I am going to try writing a python script a little later (if I don’t get otherwise engrossed with something else), I’ll post here what I learn.