Allen-Bradley 1746-HSCE SLC 500 High-Speed Counter Encoder Module

The Allen-Bradley 1746-HSCE High-Speed Counter/Encoder Module is a single-channel I/O card for SLC 500 systems that provides high-speed quadrature counting and encoder feedback. It accepts differential A/A-, B/B-, and Z/Z- signals from incremental encoders and converts them into a fast-count input for RSLogix 500 programs. The module operates from 24 V DC and is designed for SLC 500 backplanes, exposing the accumulated count to the PLC as an input word for real-time position tracking. With a maximum count frequency of up to 50 kHz, it supports precise timing and speed measurement in motion control tasks. Typical applications include monitoring conveyor speeds, indexing systems, and rotary or linear encoders where fast, reliable counting is essential. The 1746-HSCE is designed to withstand operating temperatures from 0°C to 60°C and relies on differential encoder inputs to ensure accurate direction and reference counting through A/B phase relationships and the Z index line.