High Impedance Follower

This document outlines the specifications and operating characteristics of the W500 High Impedance Follower. The W-series module contains seven fault-protected circuits, each featuring two cascaded emitter-follower amplifiers designed to allow high-impedance signal sources (like photo-cells and instrumentation amplifiers) to drive Schmitt trigger inputs or logic gates. The summary covers input current characteristics, input resistance, output voltage ranges, driving capabilities, and power requirements.