Barrier Drop Budget
Allowed safety-barrier drop with PASS verdict.
Result
Allowed barrier drop (V)
5.25
Fits (1=yes)
1
Calculation details
Wire + load drop (V)
10.75
Margin vs required (V)
3.25
Formula
Calculation logicVerify
Check before relying.
The barrier eats supply volts.
- Barrier max drop at 21.5 mA from its curve
- Keep 2 V headroom for drift and temperature
- Zener needs a clean IS earth
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HART Loop Capacitance Check
FSK impedance with 150nF verdict.
- Total C (nF)
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HART Loop Load Check
230-1100 ohm window for HART communication.
- Total loop resistance (ohm)
- HART OK (1=yes)
Workspace
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