Universal Robots UR5 Service Manual page 154

1. Fuse 48 V:
The 5A fuse (F801) "48V" protects all 48V in the system inclusive of Euromap from over
current.
This information is only for troubleshooting. Do NOT replace the fuse under any
circumstances.
In case of failure, ONLY replace the SCB with a new tested board.
2. Fuse 24 V:
2 x 5A fuses (F1001 and F1002) in parallel protect the DI/DO 24 V supply on the Safety
Control Board, whether the 24 V is from the controller or external power supply. Do NOT
replace the fuses under any circumstances. In case of failure ONLY replace the SCB with a
new tested board.
3. LED indicators:
• 12V-PSU On when the power plug is connected.
• 12V System: On when the main controller power has been activated.
• 5V On when "12V System" is on and indicates that 5V is present.
• -4V On when "12V System" is on and indicates that – 4V to analog I/O is present.
• 3V3A On when 5V is on and indicates 3.3V for logic Safety circuit A is present.
• 3V3B On when 5V is on and indicates 3.3V for logic Safety circuit B is present.
• 48V Indicates 48 V is present on the Safety Control Board
• 24V 48V is detected and ok, indicates that internal 24 V is present for I/Os
• R 48 V present on robot arm
• A Indicates Status for Logic A: a blink sequence
• B Indicates status for Logic B: a blink sequence
UR5 148
7. Troubleshooting
User Manual