Move the command and watch all four signal types track together. Flip “broken wire” to see why the live-zero signals (2–10 V, 4–20 mA, 3–15 psi) expose a fault that 0–10 V hides.
Interactive control-signal lab comparing pneumatic, 0-10V, 2-10V, and 4-20mA scaling and how live-zero signals reveal a broken wire.