MODULAR SAFETY INTEGRATED CONTROLLER MOSAIC58 8540780 • 25th June 2012 • Rev.15englishOBJECT FUNCTION BLOCKSOUTPUT OBJECTSOSSD (safety outputs)The OSSD semiconductor safety outputs require nomaintenance, Output1 and Output2 supply 24Vdc if theinput is 1 (TRUE), whereas they supply 0Vdc if the inputis 0 (FALSE).Î Each pair of OSSD has an entrance onRESTART_FBK. This input must always beconnected as described in paragraphRESTART_FBK.ParametersManual reset: If selected this enables the request to reset each time the input signal falls.Otherwise, enabling of the output directly follows the inputconditions.There are two types of reset: Manual and Monitored. WhenManual is selected the system only verifies the signal'stransition from 0 to 1. If Monitored is selected the doubletransition from 0 to 1 and then back to 0 is verified.Enable status: If checked enables the connection of thecurrent status of the OSSD with a STATUS.STATUS (signal output)STATUS output (NOT SAFETY OUTPUT) makes it possibleto monitor any point on the diagram by connecting it tothe input. The output returns 24Vdc if the input is 1(TRUE), or 0Vdc if the input is 0 (FALSE). WARNING: The STATUS output is NOT a safety output.FIELDBUS PROBEElement that permits display of the status of any pointof the scheme on the fieldbus.Up to 16 probes can be inserted and the bit on whichstatus is represented must be entered for each.States are represented with 2 bytes on the fieldbus.(For more detailed information, consult the fieldbusmanual on the MSD CD-ROM). WARNING: the PROBE output is NOT a safety output
