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Thermal Overload
The threads that wouldn't die...
- PC reliability?
- Windows, real time
- PID loops
- PCs vs. PLCs
- Replacing people
- MS 'monopoly'?
- Software quality
- Where do we go from here?
- Why pay?
- PC reliability?
- Windows, real time
- PID loops
- PCs vs. PLCs
- Replacing people
- MS 'monopoly'?
- Software quality
- Where do we go from here?
- Why pay?
Fortune
Down with categorical imperative!
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from the Automation List department...
4-20 mA pressure transmiiter low insulation
Hi! i just wondering why we got low insualtion alarm in the UPS panel ( 24vdc) if all the transmitters are connected. we tried to disconnected all 5 transmitters then the alarm is gone in the UPS panel. PLC supply coming from UPS. pressure trnasmitter connected to plc for alrma & monitoring purposes. any thoughts about this. I think the circuit of pressure transmitter giving low insulation if connected to ups 24 vdc, is that possible? pls need some advise. thanks a lot.
toper
toper
Your 24 VDC is likely grounded at some point. I suspect at the PLC - 24VDC (on purpose).
The UPS interprets a current to ground as "Low Insulation".
It might be possible to have the PLC, without more details it's hard to say.
Roy
The UPS interprets a current to ground as "Low Insulation".
It might be possible to have the PLC, without more details it's hard to say.
Roy
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