2.3.2 Manually releasing the brakesGeneralThe holding brakes of each axis’ motor are of an electromechanical type and arereleased when voltage is applied. This section details how to release the brakes,using the internal brake release unit, in order to enable the axes to move manually.The brake of each motor can also be released by connecting an external voltagesupply directly on the motor connector, see the circuit diagram or the repairprocedures for each motor (section Motors on page 168).Releasing the brakes using the brake release unitThe procedure below details how to release the holding brakes using the internalbrake release unit.Note/IllustrationActionDANGERWhen releasing the holding brakes, the robotaxes may move very quickly and sometimesin unexpected ways!Make sure no personnel is near or beneaththe robot arm!1Detailed in section Supplying powerto connector R1.MP on page 60.If the robot is not connected to the controller,power must be supplied to the connectorR1.MP.2xx0600002697The internal brake release unit is located atthe base of the robot and equipped with but-tons for controlling the holding brakes for eachaxis separately. The buttons are numberedaccording to the numbers of the axes.To release the brake on a particular robot axis,push the corresponding button on the internalbrake release panel and keep it depressed.The brake will function again as soon as thebutton is released.3Continues on next pageProduct manual - IRB 2400 593HAC022031-001 Revision: P© Copyright 2004-2018 ABB. All rights reserved.2 Installation and commissioning2.3.2 Manually releasing the brakes
