Phased array aids encoder performance

The EM1 is a three-channel optical incremental encoder module from US Digital.

The EM1 is a three-channel optical incremental encoder module from US Digital.

It is designed to detect linear or rotary position when used together with an encoder disk or linear strip.

Each module consists of a lensed LED source and a monolithic detector IC enclosed in a small plastic package.

This module uses phased array technology to provide superior performance and greater tolerances over traditional aperture mask type encoders.

Each module provides digital quadrature and index channel outputs.

The EM1 uses a single +5V supply and features internal single ended line drivers with TTL outputs while sourcing or sinking up to 8mA of current.

The first resolutions that are now available for linear encoder strips are 120, 125, 127, 200 and 250 CPI and the first resolution for rotary encoder disks are 32 CPR.

These are replacements for discontinued Agilent parts HEDS-9200-L00 and HEDS-9200-M00.

They work with stock linear strips.

They are available from stock with little or no lead time.

Technical specs and pricing are available.

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