Dear Dieter,
Many thanks for taking the time to reply in person!
There are no Doepfer markings on the underside of the pedal, or anywhere else on the unit.
The only label on the underside says Volume Pedal SN 09 3094 Manikin Electronics with a website and logo.
As described in my previous post it was purchased as a FP5 along with an A177.2 from SchneidersLaden in Berlin.
It came in a brown box marked FP5.
Checking the resistance again between tip and ring of the jack plug when swept gives roughly 0.1K to 9.4K Ohms, so I imagine it has a 10K resistor in it
I mention all this to help pinpoint exactly what pedal it is, and whether it can be used with the A177.2.
I also tried it with the A177.2 on different sections of my rack to check it is not an issue with the power bus, but it still put out voltages of roughly +7v to +11v.
Regards,
Neal