WAGO I/O-SYSTEM 750 Important Notes 9753-454 2AI 4-20mA Diff.ManualVersion 1.1.02 Important NotesThis section includes an overall summary of the most important safetyrequirements and notes that are mentioned in each individual section. To protectyour health and prevent damage to devices as well, it is imperative to read andcarefully follow the safety guidelines.2.1 Legal Bases2.1.1 Subject to ChangesWAGO Kontakttechnik GmbH & Co. KG reserves the right to provide for anyalterations or modifications that serve to increase the efficiency of technicalprogress. WAGO Kontakttechnik GmbH & Co. KG owns all rights arising fromthe granting of patents or from the legal protection of utility patents. Third-partyproducts are always mentioned without any reference to patent rights. Thus, theexistence of such rights cannot be excluded.2.1.2 Personnel QualificationsAll sequences implemented on WAGO-I/O-SYSTEM 750 devices may only becarried out by electrical specialists with sufficient knowledge in automation. Thespecialists must be familiar with the current norms and guidelines for the devicesand automated environments.All changes to the coupler or controller should always be carried out by qualifiedpersonnel with sufficient skills in PLC programming.2.1.3 Use of the WAGO-I/O-SYSTEM 750 in Compliance withUnderlying ProvisionsFieldbus couplers, fieldbus controllers and I/O modules found in the modularWAGO-I/O-SYSTEM 750 receive digital and analog signals from sensors andtransmit them to actuators or higher-level control systems. Using programmablecontrollers, the signals can also be (pre-) processed.The devices have been developed for use in an environment that meets the IP20protection class criteria. Protection against finger injury and solid impurities up to12.5 mm diameter is assured; protection against water damage is not ensured.Unless otherwise specified, operation of the devices in wet and dustyenvironments is prohibited.Operating the WAGO-I/O-SYSTEM 750 devices in home applications withoutfurther measures is only permitted if they meet the emission limits (emissions ofinterference) according to EN 61000-6-3. You will find the relevant informationin the section “Device Description” > “Standards and Guidelines” in the manualfor the used fieldbus coupler/controller.