MIDI In/Out Breakout Module

Modul A-180-8 is a simple Midi Input/Output module that can be used e.g. in combination with A-155-2 or A-198-2 to output their data as Midi messages. A-180-8 is not a stand-alone module but requires another module that is able to transmit or receive Midi data but does not feature a Midi input or output socket. The connection between A-180-8 and the main module is established by means of so-called Arduino cables which are plugged on the corresponding pin headers of both module.

Midi input (3.5 mm stereo socket)
Midi output (3.5 mm stereo socket)
Type of socket assignment (Midi TRS type 1 or 2) interally selectable via jumpers
Module requires no connection to the A-100 bus board
Power supply is provided by the main module
Midi input is buffered by an optocoupler to protect the main module against wrong connection
Midi output is buffered to protect the main module against wrong connection
Additional 4-fold multiple

https://www.doepfer.de/a1808.htm