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      Description

      Low cost proportional control typically for heating or dosing applications such as automated feeding systems. Intended to provide a proportional control using a simple (low cost) pulse/dosing method with ON/OFF control instead of a proportional controller.

      Specifications
      • Input signal ranges from ±20 mV to ±100 V, ±1 mA up to ±10 A. Standard inputs 4-20 mA, 0-10 V, etc.
      • AC and DC voltages up to 250 V, currents up to 10 A.
      • Resistance and frequency inputs also possible.
      • Input impedance of >100 kΩ for the voltage input and 50 Ω or less for the current input models.
      • Potential free relay contact output.
      • Relay contact rating 230 VAC or 30 VDC up to 5 A resistive load.
      • Internal link selection of normally open or normally closed relay output.
      • For an analogue input ranging from say 4 to 20 mA the output Pulse Period (time between output pulses) is set by SP1.
      • Four Pulse Period ranges, DIP switch selectable, 1 to 15, 1 to 30, 1 to 60 and 1 to 120 minutes.
      • Pulse Width set by SP2 from 1 to 60 seconds, fully anticlockwise = 1 second, fully clockwise = 60 seconds. SP2 is a 20 turn trimpot.
      • Input sense inversion, DIP switch selectable.
      • Auxiliary supply options: 24 VDC, 12 VDC, 9 - 18 VDC, 20 to 30 VDC, 18 – 36 VDC, 36 - 72 VDC.
      • Power requirement is 2.5 W maximum.
      • Isolation between inputs, power supply and output >1000 VDC.
      • Operating temperature -10 to 70°C.
      • 24 hour operational burn-in.
      • DIN rail mounting.
      • High quality self-extinguishing polyamide enclosure.
      • Screw terminal connections.
      • Dimensions 25 x 80 x 85 mm (W x H x D).
            Applications
            • Low cost proportional control typically for heating or dosing applications such as automated feeding systems.