Universal Robots UR3 Service Manual page 45

5. Service and Replacement of Parts
NOTICE
Always replace the black flexible flat ring to maintain the IP classification.
1. Orientate the Elbow joint and Upper arm according to the marks and gently push them
together.
2. Reconnect connectors.
3. Twist the communication cable 1.5 to 2 full rounds before it is connected to reduce
electrical noise in the system.
1 x red wire
1 x black wire
White and black
4. Orientate the Tool flange and Wrist 3 joint according to the marks and gently push them
together.
5. Place the plastic cover ring according to the mark on the flange.
Service Manual
= 48V DC
= GND
= bus connector
39 UR3