KROHNE, Control Unit, models:

ESK4 Series	Supplementary Instructions Manual
OPTISWITCH 3100	Handbook
OPTISWITCH 3100 C	Handbook
OPTISWITCH 3300 C	Handbook
OPTISWITCH 5100 C	Manual
SHD 200	Quick Start
SMARTMAC 200 W	Supplementary Instructions Manual
SMARTMAC 400	Handbook