Absolute TTL Module (ATM)
Product Announcement from Ametek Solartron Metrology
TTL/RS422 Differential Quadrature is one of the most commonly used methods of communication between Linear Displacement Transducers and Control or Data Acquisition systems. TLC Compatible Conditioning Unit that will not loose count when the sensor is moved quickly unlike incremental sensors. 500kHz output rate. It's simplicity of interfacing with programmable systems also makes it one of the most cost effective.
The Solartron ATM module is coupled to Solartron Absolute Position Transducers and converts the output to a digital signal. The transducer signal conditioning is designed such that unlike incremental TTL systems, it will not suffer from "over speeding" or lose position during a power down.