Scope of this technical record
Routes Unidrive PS.24V searches through external 24 V loads, terminal wiring, sensors, option modules and internal supply boundary before condemning the control board.
Do not bypass or oversize 24 V protection to keep a machine running. Secure the load and document wiring branches before isolating external control loads.
PS.24V load-isolation image
Searcher intent coverage
PS.24V pages should behave like an intake checklist for control wiring. The user must prove external loads and option modules before an internal supply claim.
| Observed situation | Decision needed | Evidence that satisfies the search |
|---|---|---|
| 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 |
What PS.24V users need
PS.24V is a practical fault because it often sits at the boundary between drive electronics and the machine's control wiring. A shorted sensor, damaged I/O cable, option module fault or external load can pull the rail down and look like an internal drive failure.
The useful answer is not simply '24 V overload'. The page must tell the user how to document what is connected, how to isolate branches, and when the internal supply becomes the leading suspect.
Branch-isolation map
A PS.24V record should be organized by connected load, not by guesswork.
24 V evidence route
| Observed pattern | Likely boundary | Evidence to collect | Escalation point |
|---|---|---|---|
| Trips at power-up | Hard load or internal supply collapse | Remove documented external branches and retest | Internal supply if rail still collapses unloaded |
| Trips when sensor/actuator enabled | External device or cable short | Branch current and cable inspection | Repair field device before drive |
| Trips after option module fitted | Module load or module fault | Module identity and result without module | Option-module repair/replacement |
| Intermittent with door movement | Control harness damage | Photo route and flex evidence | Harness repair before board claim |
| Rail unstable with no loads | Internal supply/control board | Voltage trend and heat evidence | Qualified bench repair |
Repair boundary
A PS.24V repair request should include a drawing or photo of all connected 24 V loads, whether the fault clears when external loads are removed, which option modules are installed, and whether the fault follows a particular branch or cable movement.
Only after the external loads and option modules are proven should the internal control-supply board be treated as the repair target. This distinction prevents shipping a healthy drive while the real short remains in the machine wiring.
Field record checklist
- Drive type/frame and option modules
- All external 24 V loads connected
- Whether PS.24V clears with branches isolated
- Terminal and cable photos
- Trip timing at power-up, enable or device actuation
- Voltage behaviour with and without external loads
Technical basis and reference documents
This is an independent editorial technical reference. Original manufacturer documentation remains controlling for installation, repair and commissioning decisions.
Used for PS.24V trip-family alignment.