APD 1700 & 1720 Series Frequency Input Alarms

The APD 1700 series accepts a frequency input and provides a visual alarm indication and alarm relay contact outputs. The input is factory configured to a specific frequency input range. The input can be of any type as long as it has a minimum of 100 mV amplitude change and a minimum 5 microsecond pulse width. Input sensitivity is potentiometer adjustable. Front-accessible potentiometers are used to adjust each alarm setpoint and deadband.