4.5 Frame and base4.5.1 Replacement of SMB unitLocation of SMB unitThe SMB/BU unit (SMB = serial measurement board, BU = brake release unit) islocated on the left-hand side of the frame as shown in the figure below.The SMB unit and the BU unit are both located inside the SMB/BU box.ABCD1EFGHID2xx0600003052Attachment screws (4 pcs)ASMB/BU unitBVelcro strapCBattery pack (2-pole battery contact)D1Battery pack (3-pole battery contact)D2SMB/BU boxESerial measurement unit (SMB), DSQC 633AFSerial measurement unit (SMB), RMU 101FBrake release unit (BU), DSQC 1050GPush button guardHCover, push button guardIGasket (Foundry Plus)JContinues on next pageProduct manual - IRB 6620LX 2253HAC035737-001 Revision: P© Copyright 2009-2018 ABB. All rights reserved.4 Repair4.5.1 Replacement of SMB unit
