HIMax Safety Manual - Tuv-fs.com

8 Output Modules HIMax8 Output ModulesModule8.1 GeneralNumber ofchannelsSafety-relatedDigital OutputsX-DO 24 01 24 SIL 3 -Digital Relay OutputsX-DO 12 01 12 SIL 3 •Table 12: Overview of the Output ModulesSafely electricallyisolatedThe safety-related output modules are written once per cycle, the generated output signalsare read back and compared with the specified output data.The safe state of the outputs is "0" or an open relay contact.Using the corresponding error codes, the user has additional options for programming faultreactions in the user program.For more information on the output modules, refer to the individual module manuals.8.2 Safety of ActuatorsIn safety-related applications, the PES and its connected actuators must all meet the safetyrequirements and achieve the specified SIL. Also refer to Annex "Increasing the SIL Valueof Sensors and Actuators".8.3 Redundancy of Outputs and Output ModulesTo increase availability, the output channels can be defined redundant to one another fromwithin the SILworX Hardware Editor. The following conditions must be ensured:• Output channels are located on different output modules of the same type.• Output channels have the same channel number.Both output channels are assigned to the same variable. If an actuator or one of the outputmodules fails, the redundant channel takes up the function.It is permitted to assign all of the output module channels or only a few of them to thecorresponding channels of another output module.8.4 Slots Permitted for Output ModulesThe input modules can be plugged in to any slot in any base plate with the exception of thefollowing slots:• Slots 1 and 2 of each base plate, which are reserved for the system bus modules• Slots used by the processor modules. Depending on the system configuration, thesecan be slots 3, 4, 5 and 6 of Rack 0 and slots 3 and 4 of Rack 1.Page 40 of 70HI 801 003 D Rev.2.0