Servo is the possibility, to control one Servo without digital knick-knacks.
For more details please refer to the manual.
The software ServoAnsteuerung can be used to change parameters in hex-file.
The PCB fits into 'Merscheider Schacht', the corresponding documentation can be found here: https://magentacloud.de/s/kaW4Fp5ok3t4Pqf