Scope of this technical record
Routes Unidrive PS.24V through external 24 V loads, option modules, encoder/sensor supply, terminal wiring and internal supply evidence.
Do not overfuse, bypass or short external 24 V protection. Secure the machine before disconnecting control wiring or option-module loads.
Unidrive PS.24V route
PS.24V is a branch-isolation problem before it is an internal supply claim.
PS.24V load-isolation image
Service decision coverage
PS.24V pages should behave like an intake checklist for control wiring. The technician must prove external loads and option modules before an internal supply claim.
| Observed situation | Decision needed | Evidence that satisfies the case |
|---|---|---|
| Trip at power-up | Hard short or internal supply | External branch isolation result |
| Trip when device actuates | Sensor/actuator/cable branch | Branch current and cable inspection |
| Trip after module fitted | Option-module load | Module identity and removed-module test |
PS.24V is a load-isolation route
PS.24V should be treated as a branch-isolation problem first. External sensors, option modules, feedback devices, terminal wiring and added controls can overload or short the 24 V rail before the internal supply is actually failed.
Load-isolation matrix
The best evidence shows which branch makes the fault appear.
PS.24V evidence
| Branch | Evidence | Repair direction |
|---|---|---|
| External I/O loads | Fault clears when branch isolated | Field wiring or sensor issue |
| Feedback device | Encoder supply/current issue | Feedback path |
| Option module | Fault follows module | Module or configuration |
| Terminal wiring | Short or incorrect external connection | Panel wiring |
| Internal supply | Fault persists with external loads proven | Control-board/supply evaluation |
Repair boundary
Only after external loads and option modules are isolated should the internal 24 V supply be considered suspect. The support request should state which branches were removed and what changed.
Field record checklist
- External loads
- Option modules
- Feedback supply
- Branch isolation result
- Internal rail evidence
Technical basis and reference documents
This is an independent editorial technical reference. Original manufacturer documentation remains controlling for installation, repair and commissioning decisions.
Public trip-code context for internal power-supply trips.
Diagnostic workflow
Turn this record into a qualified service request
A repair decision is much more reliable when the request includes the exact identity of the drive, the first fault evidence and the machine condition when the symptom appeared.
- Complete drive type code / MLFB or nameplate model
- Fault code, fault value and first event before reset
- When the event appears: power-up, enable, ramp, run, decel or stop
- Motor/cable connected or isolated during the symptom
- Visible board, option-card, module and connector identifiers
- Previous repair history, replacement parts and repeat-failure pattern