ABB ACS800-U1 - 1 Introduction to the Manual; Contents of this Chapter; Applicability; Safety Instructions

Introduction to the manual 7
1
Introduction to the manual
Contents of this chapter
This chapter describes the manual in short and gives some general information for the
reader.
Applicability
The manual applies to the ACS800-01/04/04LC/04M/11/14/31/104/104LC and
ACS800-U1/U4/U11/U31 drives and inverter modules which have the option +Q967:
Safe torque off (STO).
Safety instructions
Only a qualified electrician who has appropriate knowledge on functional, machine and
process safety is allowed to install, start up and maintain the safety circuit.
WARNING! The Safe torque off function does not disconnect the voltage of the
main and auxiliary circuits from the inverter. Therefore maintenance work on
electrical parts of the inverter or the motor can only be carried out after isolating
the inverter from the main supply.
WARNING! The Safe torque off functionality is only achieved, when the ASTO
board is installed on the inverter module. True Safe torque off functionality is not
achieved, if the option board is installed on other types of modules, such as the
supply unit or the brake unit.