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7 Input Modules <strong>HIMax</strong>7.6 Checklists for <strong>Safety</strong>-Related Digital InputsHIMA re<strong>com</strong>mends using the following checklists for engineering, programming andstarting up safety-related digital inputs. The checklists can be used for helping with planningas well as to demonstrate later on that the planning phase was carefully <strong>com</strong>pleted.When engineering or starting up the system, the user can fill out a checklist for each of thesafety-related input channels used in the system to verify the requirements to be met. Thisis the only way to ensure that all requirements were considered and clearly recorded. Thechecklist also documents the relationship between the external wiring and the userprogram.7.6.1 Checklist for the X-DI 32 01 Digital Input Module<strong>HIMax</strong>Checklist for Engineering, Programming and Start-upCompanyV.1.0LocationDesignationSRSInput no.<strong>Safety</strong>-Related Digital Inputs of the X-DI 32 01 ModuleSeq. no. Requirement Yes No Remark1. Is this input used for safety functions? 2. Is the fault signal processed within the userprogram?3. Does the input have a redundant input? 4. Were the filters properly configured?Time on delay Ton =μs Time off delay Toff =μs5. Is noise blanking activated? 6. Is a shielded cable used for connecting thesensor? 7. Has forcing been activated for the globalvariable assigned to this input? Page 32 of 70HI 801 003 D Rev.2.0
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