4-Axis, Quadrature Encoder Counter Input Module for Compact FieldPoint—The cFP-QUAD-510 is a quadrature encoder input module for Compact FieldPoint. You can use the cFP-QUAD-510 to measure position and velocity in both forward and reverse directions, and it features a lowpass filter on all input channels to eliminate false counts caused by high-frequency transients. The cFP-QUAD-510 connects to either single-ended TTL or differential line signals.