The 590+ has five analog inputs, four configurable and one dedicated, rated for +/-10VDC, 1mA. All analog inputs have 12-bit resolution, (plus sign bit). Approximately 2.5mV/resolution. The inputs are scanned approximately every 10 milliseconds. The dedicated input connects directly to the SPEED LOOP or CURRENT LOOP (Analog Input 2 (A3)) and is scanned every 3 milliseconds.