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// Industrial Connectors

HART Protocol 4-20mA

HART superimposes FSK digital communication on a 4-20mA analog loop. Two wires carry both power and bidirectional data requiring a 250-ohm minimum load.

// Specifications
Standard
HART Communication Foundation
Physical
4-20mA current loop
Supply
12V-42V on loop
Load
250 ohm minimum
Use Case
Industrial sensors, field instruments
// Pin Reference Table
Pin Name Function Type
1 Loop+ Current loop positive 12V-42V PWR
2 Loop- Current loop negative BUS