EN / ACS800-31/U31 Hardware Manual - Simark Controls

4WARNING! The Safe torque off function does not disconnect the voltage of the mainand auxiliary circuits from the drive. Therefore maintenance work on electrical partsof the drive or the motor can only be carried out after isolating the drive system fromthe main supply.Note: The Safe torque off function can be used for stopping the drive in emergencystop situations. In the normal operating mode, use the Stop command instead. If arunning drive is stopped by using the function, the drive will trip and stop by coasting.If this is not acceptable, e.g. causes danger, the drive and machinery must bestopped using the appropriate stopping mode before using this function.Note concerning permanent magnet motor drives in case of a multiple IGBTpower semiconductor failure: In spite of the activation of the Safe torque offfunction, the drive system can produce an alignment torque which maximally rotatesthe motor shaft by 180/p degrees. p denotes the pole pair number.Note: If you add or modify the wiring in the drive safety circuits, ensure that theappropriate standards (e.g. IEC 61800-5-1, EN 62061, EN/ISO 13849-1 and -2) andthe ABB guidelines are met. After making the changes, verify the operation of thesafety function by testing it.NEW (page 75): Installation of ASTO board (Safe torque off, +Q967)What this chapter containsThis chapter describes• electrical installation of the optional Safe torque off function (+Q967) of the drive.• specifications of the board.Safe torque off (+Q967)The optional Safe torque off function includes an ASTO board, which is connected tothe drive and an external power supply. See also chapter Planning the electricalinstallation, page 50.Installation of the ASTO boardWARNING! Dangerous voltages can be present at the ASTO board even when the24 V supply is switched off. Follow the Safety instructions on the first pages of thismanual and the instruction in this chapter when working on the ASTO board.Make sure that the drive is disconnected from the mains (input power) and the24 V source for the ASTO board is switched off during installation andmaintenance. If the drive is already connected to the mains, wait for 5 min afterdisconnecting mains power.Update Notice