BrainEater
[H]ard|Gawd
- Joined
- Jul 21, 2004
- Messages
- 1,234
I have an issue with a current control loop , I know there's a couple people here with insight. ;D
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I have a PLC that is running as a 4-20mA 'source' . In an Ideal situation , the pH meter I am trying to interface should be a 4-20mA 'sink' .
It's not, the pH meter runs as a 'source' as well.
---
I know they make converters/"isolation converters" that will work , but they are $$
I can Fabricate PCB's in house , but , my google fu is failing me .
What's the circuit I need ?
Advice ?
--
I have a PLC that is running as a 4-20mA 'source' . In an Ideal situation , the pH meter I am trying to interface should be a 4-20mA 'sink' .
It's not, the pH meter runs as a 'source' as well.
---
I know they make converters/"isolation converters" that will work , but they are $$
I can Fabricate PCB's in house , but , my google fu is failing me .
What's the circuit I need ?
Advice ?