Loop Load and Supply Margin
Supply headroom at 20-22 mA worst case.
Result
Margin (V)
5.00
Transmitter terminal (V)
13.00
PASS (1=yes)
1
Calculation details
Loop drop (V)
11.00
Max resistance (ohm)
727.3
Formula
Calculation logicVerify
Check before relying.
Volts must add up with margin.
- Supply minus drops leaves TX minimum plus 2 V
- Design at 21.5 mA, not 20
- Barrier drop from its datasheet, not guess
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AI Channel Loading
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- Margin per channel (V)
- Supply current (mA)
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Barrier Drop Budget
Allowed safety-barrier drop with PASS verdict.
- Allowed barrier drop (V)
- Wire + load drop (V)
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Current to Voltage Resistor
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- Resistor (ohm)
- Dissipation (W)
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HART Loop Capacitance Check
FSK impedance with 150nF verdict.
- Total C (nF)
- Z at 1200Hz (ohm)
Workspace
Keep the assumptions with the result.
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