1 Safety1.2.2.5. Risks associated with live electric parts3HAC026660-001 Revision: C20© Copyright 2006-2008 ABB. All rights reserved.1.2.2.5. Risks associated with live electric partsVoltage related risks, general• Although troubleshooting may, on occasion, have to be carried out while the powersupply is turned on, the robot must be turned off (by setting the mains switch to OFF)when repairing faults, disconnecting electric leads and disconnecting or connectingunits.• The mains supply to the robot must be connected in such a way that it can be turnedoff outside the robot’s working space.Voltage related risks, IRC5 controllerA danger of high voltage is associated with for example the following parts:• Be aware of stored electrical energy (DC link, Ultracapacitor bank unit) in thecontroller.• Units such as I/O modules, can be supplied with power from an external source.• The mains supply/mains switch• The transformers• The power unit• The control power supply (230 VAC)• The rectifier unit (400-480 VAC and 700 VDC. Note: Capacitors!)• The drive unit (700 VDC)• The drive system power supply (230 VAC)• The service outlets (115/230 VAC)• The customer power supply (230 VAC)• The power supply unit for additional tools, or special power supply units for themachining process.• The external voltage connected to the controller remains live even when the robot isdisconnected from the mains.• Additional connections.Voltage related risks, robotA danger of high voltage is associated with the robot in:• The power supply for the motors (up to 800 VDC).• The user connections for tools or other parts of the installation (max. 230 VAC, seechapter Installation and commissioning in the Product manual).Voltage related risks, tools, material handling devices, etcTools, material handling devices, etc., may be live even if the robot system is in theOFFposition. Power supply cables which are in motion during the working process may bedamaged.
