All rights reserved  52  Servicemanual_UR3_en_rev3.1.2 
 
3.2.3 Replacement of Safety Control Board (SCB) 
 
Take care of ESD handling 3.2.1 Handling ESD-sensitive parts 
How to replace Safety Control Board in Controller box 
 
1.  Check that the software on the robot is as new as the firmware version on the SCB. 
If the software on the robot is too old then you get an error C203A0. 
 
Find the SCB firmware ver. on the Ethernet connector. 
 
 
 
 
 
 
 
 
 
 
Find the firmware versions in the “About” menu. 
 
Shortcut to “About” is available from software version 3.2.18642