Harmon Defect Detection Systems

Harmon's family of coded electronic track circuits is the backbone of the success of our signaling system. The circuits send vital traffic control information between signal locations through the tracks themselves to activate signaling equipment and keep rail traffic moving smoothly and safely.

EC

Electro Code Principles

This breakthrough technology brought communications to dark territory and became the electronic replacement for pole line between signals.

EC4

Electro Code 4 Plus

This enhanced DC-coded signaling system uses the rails to carry track, block and aspect information. Advanced plug-in module configuration.

EE-Code

Electrified Electro Code

With its high noise immunity, EE-Code provides signal control applications in electrified traction power territory.

CAB 4-60 & CAB 901

Cab Signal Equipment

Versatile units for use with Electro Code 4 signal systems to provide AC track drive energy to the rails.