6 ï Important CommentsSafety NotesWAGO-I/O-SYSTEM 750I/O Modules1.4 Safety NotesWarningSwitch off the system prior to working on bus modules!In the event of deformed contacts, the module in question is to be replaced, asits functionality can no longer be ensured on a long-term basis.The components are not resistant against materials having seeping and insu-lating properties. Belonging to this group of materials is: e.g. aerosols, sili-cones, triglycerides (found in some hand creams).If it cannot be ruled out that these materials appear in the component envi-ronment, then additional measures are to be taken:- installation of the components into an appropriate enclosure- handling of the components only with clean tools and materials.AttentionCleaning of soiled contacts may only be done with ethyl alcohol and leathercloths. Thereby, the ESD information is to be regarded.Do not use any contact spray. The spray may impair the functioning of thecontact area.The WAGO-I/O-SYSTEM 750 and its components are an open system. Itmust only be assembled in housings, cabinets or in electrical operationrooms. Access must only be given via a key or tool to authorized qualifiedpersonnel.The relevant valid and applicable standards and guidelines concerning theinstallation of switch boxes are to be observed.ESD (Electrostatic Discharge)The modules are equipped with electronic components that may be destroyedby electrostatic discharge. When handling the modules, ensure that the envi-ronment (persons, workplace and packing) is well grounded. Avoid touchingconductive components, e.g. gold contacts.1.5 ScopeThis manual describes the Digital Output Module 750-5172 DO 230V AC 1.0 A/ Relay 2 CO/Pot. Free of the modular WAGO-I/O-SYSTEM 750.Handling, assembly and start-up are described in the manual of the FieldbusCoupler. Therefore this documentation is valid only in the connection with theappropriate manual.