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Thread: Allen Bradley VFD
09-29-2010, 07:01 AM #1Professional Member
- Join Date
- Feb 2004
- LEXINGTON, KY.
Allen Bradley VFD
I have a process chiller that someone has installed vfd's Allen Bradley powerflex 4 on the condenser fan, does the vfd have a powersource or do I need to insall one and what transmitter do I need the one on there only has 2 wires which is telling me that it is not a high pressure transmitter which is always three wires! thanks guys.
09-30-2010, 12:09 AM #2
It might be just a two wire analog signal. I'd say track the wires down, and have in hand a manual for that drive. I'm not familiar with that particular VFD, but many these days have their own power source for sensors, and some can even run the whole PID process.
You may have a two wire transmitter.
Chances are you can find the manual on line with a Google search.God Bless the USA