vacon • 15.1.4 Safe Torque off (STO) terminals ...................................................................................... 515.1.5 Description of additional echo connectors ...................................................................... 525.1.6 Led handling..................................................................................................................... 565.1.7 Selection of terminal functions with dip switches........................................................... 575.2 Fieldbus connection ......................................................................................................... 585.2.1 Modbus RTU protocol....................................................................................................... 595.2.2 Preparation for use through RS485................................................................................. 606. Commissioning ............................................................................................... 626.1 Commissioning of the drive ............................................................................................. 636.2 Changing EMC protection class....................................................................................... 646.2.1 Changing EMC protection class - MS2 three-phase version .......................................... 646.2.2 Changing EMC protection class - MS2 single-phase version ......................................... 666.2.3 Changing EMC protection class - MS3 ............................................................................ 676.3 Running the motor ........................................................................................................... 686.3.1 Cable and motor insulation checks ................................................................................. 686.4 Maintenance ..................................................................................................................... 697. Technical data ................................................................................................ 707.1 AC drive power ratings..................................................................................................... 707.1.1 Mains voltage 3AC 208-240V............................................................................................ 707.1.2 Mains voltage 1AC 208-240V............................................................................................ 707.1.3 Mains voltage 3AC 380-480V............................................................................................ 717.1.4 Definitions of overloadability ........................................................................................... 717.2 Brake resistors ................................................................................................................ 727.3 VACON® 20 CP - technical data ...................................................................................... 737.3.1 Technical information on control connections ................................................................ 768. Options ........................................................................................................... 788.1 Vacon keypad with seven-segment display ..................................................................... 788.2 Text keypad....................................................................................................................... 798.3 Menu structure................................................................................................................. 798.4 Using the keypad .............................................................................................................. 808.4.1 Main menu........................................................................................................................ 808.4.2 Resetting fault .................................................................................................................. 818.4.3 Local/Remote control button........................................................................................... 818.4.4 Reference menu............................................................................................................... 828.4.5 Monitoring menu .............................................................................................................. 838.4.6 Parameter menu .............................................................................................................. 848.4.7 System/Fault menu.......................................................................................................... 858.5 Fault tracing ..................................................................................................................... 878.6 Option boards ................................................................................................................... 918.6.1 Option board installation.................................................................................................. 929. Safe Torque Off............................................................................................... 969.1 General description.......................................................................................................... 969.2 Warnings .......................................................................................................................... 969.3 Standards ......................................................................................................................... 979.4 The principle of STO ......................................................................................................... 989.4.1 Technical details .............................................................................................................. 999.5 Connections.................................................................................................................... 1009.5.1 Safety Capability Cat. 4 / PL e / SIL 3............................................................................. 1019.5.2 Safety Capability Cat. 3 / PL e / SIL 3............................................................................. 1039.5.3 Safety Capability Cat. 2 / PL d / SIL 2............................................................................. 1039.5.4 Safety Capability Cat. 1 / PL c / SIL 1............................................................................. 1049.6 Commissioning............................................................................................................... 105