The basis of the Siemens 9775 is an BASF 6106 flexible disk drive. These external disk drives were used in the electronic process control systems „TELEPERM M“ from Siemens.
TELEPERM M is the name for an electronic process control system developed by Siemens AG in the early 1980s. It enables the automation of continuous and discontinuous process engineering processes.
This process control system is characterized by its extremely robust and modular system. Up to 15,000 facilities have been equipped with this system. Despite its great age, it is therefore still quite widespread. However, since it is now becoming increasingly difficult to obtain spare parts for the system components, some of which are 20 years old and no longer manufactured, more and more users are equipping their facilities with more modern systems, such as the successor system SIMATIC PCS 7, which appeared in 1997, and as a result Teleperm M is becoming increasingly less important.
The company IPKS, for example, has specialized in the modernization of TELEPERM control technology systems.
My floppy disk drive has the label S26361-K41-V1 and must have been one of the first drives. The newer systems have mostly the label 6DS3900-8AD and will be offered at ebay for about 2.000 to 4.000 EUR as of February 2020!
Both cables and/or plugs are of course specially designed for Siemens systems and are not compatible with IBM PC/XT devices.
Since the case is very roomy, it was no problem to install a standard DB37 cable with additional power supply. The conversion took at most 30 minutes (if you have all parts). I have of course carefully tucked away the old cables. A dismantling would take 10 minutes at most.
With the new DB37 cable I can easily connect the external drive to my CompatiCard IV (CC4) at the P4 connector. Power is supplied via PINs 1 and 2 of the CC4, just like with my MegaMate 2.8 or the TAXAN. Works perfectly.