FieldengInstrumentation & Controls
250 Ω Loop Resistor
Voltage across a 250 Ω HART / PLC current-loop resistor.
Voltage across a 250 Ω HART / PLC current-loop resistor.
App id: INST-11. Reference version 1.0.
How to fill it
Fill the inputs. The tool shows the outputs.
On the tool screen, Calc is the working sheet. Presets stores values you reuse. Reference is the formula, assumptions, and provenance below.
Formula
V = I × 250 ΩInputs
| Name | Unit |
|---|---|
| Loop current (camera) | mA |
Outputs
| Name | Unit |
|---|---|
| Resistor voltage (hero result) | V |
Diagnose
This tool does not attach diagnose observations.
Assumptions
- Fixed 250 Ω. Use loop burden if the resistor is a different value.
Provenance
- Common 1–5 V conversion of a 4–20 mA loop.