What it means
A49935 reports that the protective breaker in the 24 V circuit of the door solenoids in the power unit has tripped. The Control Unit does not detect the trip itself: the message is fed to it through the signal source of binector input p6577[19], so the alarm follows whatever that circuit monitoring input reports. Depending on the drive configuration, the same condition can also be raised as a fault instead of an alarm.
Why it appears
- The protective breaker in the 24 V circuit that feeds the door solenoids of the power unit has tripped.
What to check
- Check the 24 V circuit of the door solenoids in the power unit.
Parameters the manual names
- p6577 — binector input (BI) for the circuit monitoring functions signal source. Index [19] is the signal source through which this message is output, so it is where you trace the tripped-breaker signal back to.
Acknowledging and restarting
As an alarm, A49935 triggers no automatic drive response and needs no acknowledgment: once the 24 V circuit of the door solenoids is intact again and the protective breaker no longer reports a trip, the message clears by itself. If the drive configuration raises the same condition as a fault, the drive object is switched off — OFF1 is the listed reaction, with NONE, OFF1_DELAYED, OFF2 or OFF3 selectable per configuration.
The same on every family
Every manual that describes A49935 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE | NONE | General drive fault (19) | None | SINAMICS S120, S150 List Manual · p. 3295 |
The drives this code lives on
A49935 is described for S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does SINAMICS alarm A49935 mean?
The protective breaker in the 24 V circuit of the door solenoids in the power unit has tripped. The Control Unit receives the signal via binector input p6577[19].
How do I clear alarm A49935?
Check the 24 V circuit of the door solenoids in the power unit. No acknowledgment is required — the message clears by itself once the trip is gone.
Can A49935 also appear as a fault?
Yes. Depending on the drive configuration, the same condition can be raised as a fault; the drive object is then switched off, with OFF1 as the listed reaction and other stop reactions selectable.
Which parameter is linked to A49935?
p6577, the binector input for the circuit monitoring functions signal source. Index [19] is the input through which this door-solenoid breaker message is output.
Codes next to this one
Source
Written from Siemens' own List Manuals and operating instructions; every number, designation and parameter on this page is checked against them before publication.
All SINAMICS codes: fault and alarm codes · the A49xxx group · SINAMICS manuals · Siemens manuals