G4 I/O family
The G4IDC5Q quadrature input module (actually a pair of two modules that work together) is designed to allow a digital mistic 200 multi-function I/O brick to resolve positional information from quadrature encoder devices. The module outputs a pulse to the brick each time the quadrature state changes; the brick counts the module outputs and keeps track of the direction of rotation.
NOTE: This module cannot be used with an E1 or B1 brain board.