--- In email@example.com
, "Cary Rhodes" <rhodeseng@y...>
> I just bought one of these on ebay for $25.00.
> I can probably get several, if anybody wants one let me know before
> pay up.
> That would be my cost plus ship to you.
> control concepts Model 1020-24-20-4/20MA
> here's the website.
> cary r
I just read the instruction manual.
The model specified:
240VAC,20A, 4/20 mA signal
Input requires a 4 to 20 mA signal and can develop up to 7 Volts drop
(complience) It's looking for a current signal and will have a
voltage drop up to the "complience value. The "nominal input
resistance is 350 ohms. Feeding this thing is going to be a challenge
a simple voltage divider pot will cause problems. It is designed to
work with "standard" process control 4/20 controlers designed to
provide a current which they normally develop from a 24VDC system
they typically have a "compliance of 12VDC so there is a 5 volt pad
fpr line drop in the typical series or "current loop" circuit.
Most "receiving" devices have an inpur resistance of 250 ohms whicr
can be removed to allow 1/5 volt parallel loop "voltage signals.