SRVO-213: E-STOP Board FUSE2 blown
FUSE2 on the emergency stop board is blown, or the external 24V supply (EXT24V) is absent.
What it means
FUSE2 on the emergency stop board is blown, or the external 24V supply (EXT24V) is absent. This is the fuse that batch-01's E-stop alarms (SRVO-001/004/007) keep pointing at - when an E-stop alarm won't clear, this is often why. On multi-Safe-I/O systems the message numbers which device.
Common causes
Ranked by what technicians most often find, most likely first.
- Blown FUSE2 on the E-stop board - find what overloaded it before replacing.
- No 24V between EXT24V and EXT0V at TBOP14 (A-cabinet) / TBOP10 (B-cabinet) - external supply missing.
- Software-version quirk: on certain older versions (e.g., 7DC3/43 and earlier families), a blown fuse on the ADDITIONAL safety I/O board mis-reports as this alarm - check that board's fuse too and follow SRVO-219 if so.
How to fix it
- Inspect FUSE2 on the E-stop board; identify and eliminate the overload cause, then replace the fuse - a fuse that blows twice is a symptom, not a consumable.
- Verify 24V is present between EXT24V and EXT0V at the terminal block for your cabinet type.
- On the affected software versions, also check the additional safety I/O board's fuse. Electrical work on the safety chain: qualified personnel, lockout/tagout.
Quick facts
- Category
- Servo
- Affected series
- R-30iB; R-30iB Mate; R-30iB Plus; R-30iB Mate Plus
- Alarm family
- SRVO