This connects to the absolute encoder and indicates the position signal on an optional scale. That signal can be done in digital output or analog output. There is a battery operated limit switch that operates in a preset position, optionally. * Applicable to an encoder of wide scope * Can correspond to encoders of range 8bit-16bit, code (grey, pure, BCD), various power sources (DC12V, 24V, 5V) * There are various types of output.