2 ContentsContents ...................................................................Page No. Contents ....................................................................... Page No.AC30 series Variable Speed InverterCircuit Breakers (alternative to AC Line Fuses) ............................ 6-3External EMC Filters (optional) ....................................................... 6-3AC Line Chokes (optional)............................................................... 6-4Dynamic Braking Resistors (optional) ........................................... 6-5AC Motor Chokes (optional) ............................................................ 6-6DC Link Fed 740 Stacks: Connection Overview ..................................... 6-7AC Line Input Fuses ......................................................................... 6-8External EMC Filters (optional) ....................................................... 6-8AC Line Choke .................................................................................. 6-8Pre-charge Considerations.............................................................. 6-8DC Link Input Fuses ....................................................................... 6-10AC Motor Chokes (optional) .......................................................... 6-10AFE System Using DC Link Fed 740 Stacks: Connection Overview .. 6-11AC Line Input Fuses ....................................................................... 6-12External EMC Filters (optional) ..................................................... 6-12DC Link Input Fuses ....................................................................... 6-12AC Motor Chokes ........................................................................... 6-12Line Synchronisation Card & AC30 Control Module .................. 6-13Chapter 7: Associated Equipment - Control Module .... 7-1Cabling Brackets .............................................................................. 7-1Option Cards ..................................................................................... 7-1Communication Cards ..................................................................... 7-2SD Memory Cards ............................................................................. 7-2Graphical Keypad (GKP) .................................................................. 7-3Chapter 8: Safe Torque Off SIL3/PLe ............................. 8-1General Information ......................................................................... 8-1STO Functional Description......................................................................8-2Alignment to European Standards ................................................. 8-3EN ISO13849-1:2008 ..................................................................................8-3EN61800-5-2:2007 and EN61508 ...............................................................8-4Safety Specification ......................................................................... 8-5EMC Specification ............................................................................ 8-6User Connections ............................................................................. 8-7STO Technical Specification ........................................................... 8-9Inputs Specification ...................................................................................8-9Output Specification ..................................................................................8-9Truth Table ...............................................................................................8-10STO Input Timing Diagrams .......................................................... 8-11Ideal Operation .........................................................................................8-11Typical Operation.....................................................................................8-12Fault Operation ........................................................................................8-13Pulsed Inputs ...........................................................................................8-14STO State Transition Diagram....................................................... 8-15STO Trip Annunciation .................................................................. 8-16Safety Warnings and Limitations ...........................................................8-17Example User Wiring ...............................................................................8-19Applications that do not require STO function .....................................8-19Minimum STO Implementation ...............................................................8-20STO Implementation with Safety Control Unit.......................................8-21SS1 Implementation using Safety Control Unit .....................................8-23STO Function Checking ................................................................. 8-25Comprehensive Check ................................................................... 8-26The following test steps must be performed: .......................................8-27Regular Check ..........................................................................................8-29Troubleshooting ............................................................................. 8-30Chapter 9: The Graphical Keypad................................... 9-1Overview ............................................................................................ 9-1Keypad ............................................................................................... 9-2