2 Installation and commissioning
2.5.5. Manually releasing the brakes, external brake release unit
3HAC022033-001 Revision: K86
© Copyright 2004-2011 ABB. All rights reserved.
2.5.5. Manually releasing the brakes, external brake release unit
General
The section below details how to release the holding brakes of each axis motor using push
buttons on an external brake release unit. This does not require the controller to be connected.
When to use the external brake release unit
The external brake release unit must only be used when the robot does not have an internal
brake release unit (when there are no push buttons on the robot).
Internal brake release unit
How to use the internal brake release unit, if available, is detailed in section Manually
releasing the brakes on page 83.
Required equipment
Connections, robot
The illustration below shows where to connect the external brake release unit in order to
release the holding brakes of the robot.
xx0100000104
Equipment Art. no.
External brake release unit 3HAC12987-1
A Connector R1.BU
B Rear connector plate
C Rear cover plate
D External brake release unit
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