Analog I/O

Signal Scaling Calculator Analog I/O

Input

Signal type

Signal Value (mA)

Eng. units min

Eng. units max

Units label

Output

Eng. value —

% of span —

Min Max

Input

Signal type

Eng. value

Eng. units min

Eng. units max

Output

Signal output —

% of span —

Input — two IO pairs

x₁ (raw)

y₁ (eng.)

x₂ (raw)

y₂ (eng.)

Output — y = mx + b

Slope (m) — scale factor —

Offset (b) — intercept —

Common Signal Types

Signal	Live zero
4–20 mA	yes
0–20 mA	no
0–10 V	no
2–10 V	yes
0–5 V	no
1–5 V	yes

"Live zero": a broken wire reads below-range and faults, not as a valid 0%.