Delta Computer Systems, Inc. announced its new Quadrature encoder input module (Q4) for the RMC200 motion controller. Each Q4 module has four incremental quadrature encoder input channels (A, B and Z) supporting RS-422, HTL, or TTL. Each input channel also has home and registration inputs with 5V or 24V signal levels and LEDs indicating encoder faults and the state of the home and registration inputs.