WAGO I/O-SYSTEM 750 Important Notes 11753-454 2AI 4-20mA Diff.ManualVersion 1.1.02.2 Safety Advice (Precautions)For installing and operating purposes of the relevant device to your system thefollowing safety precautions shall be observed:Do not work on devices while energized!All power sources to the device shall be switched off prior to performing anyinstallation, repair or maintenance work.Install the device only in appropriate housings, cabinets or in electricaloperation rooms!The WAGO-I/O-SYSTEM 750 and its components are an open system. As such,install the system and its components exclusively in appropriate housings,cabinets or in electrical operation rooms. Allow access to such equipment andfixtures to authorized, qualified staff only by means of specific keys or tools.Replace defective or damaged devices!Replace defective or damaged device/module (e.g., in the event of deformedcontacts), since the long-term functionality of device/module involved can nolonger be ensured.Protect the components against materials having seeping and insulatingproperties!The components are not resistant to materials having seeping and insulatingproperties such as: aerosols, silicones and triglycerides (found in some handcreams). If you cannot exclude that such materials will appear in the componentenvironment, then install the components in an enclosure being resistant to theabove-mentioned materials. Clean tools and materials are imperative for handlingdevices/modules.Clean only with permitted materials!Clean soiled contacts using oil-free compressed air or with ethyl alcohol andleather cloths.