OVERVIEW
ISST420DA Series
Dual-Channel True Zero Speed Hall-Effect Sensor
The ISST420DA Series is a dual-channel Hall-effect speed sensor designed for true zero speed detection and direction sensing in demanding railway environments. Its rugged stainless-steel housing detects magnetic field changes from rotating toothed ferrous target wheels to provide reliable speed monitoring.
Featuring phase-displaced current pulse outputs and a line-replaceable unit design, the ISST420DA supports accurate speed and direction sensing while simplifying installation and maintenance in axle-mounted railway applications.
KEY FEATURES
Reliable sensing, built for rail.
Compatible connection base
A compatible SAM/SAM2 connection base supports installation and selected legacy product compatability.
Status and alarm options
Selected surge protection devices include thermal status indication and remote alarm contacts.
Alarm loop indication
Selected modules provide visual indication for monitoring alarm-loop conditions.
Loop testing and isolation
Dedicated modules support loop testing and electrical isolation during testing procedures.
Application-Specific Modules
Options support PLC/SSI circuits, power distribution and general-purpose protection requirements.
AC and DC surge protection
Protects selected AC and DC circuits against electrical surges, depending on the module.
ISST420DA SERIES
Technical Specifications
