UDC3500 Universal Digital Controller

UDC3500 Universal Digital Controller

 Built on a legacy of performance and reliability, Honeywell's next-generation controller, the UDC3500, delivers unmatched power, flexibility and performance in the popular ¼ DIN size. Available as a single loop or dual loop controller, the waterproof NEMA 4X/IP66 faceplate allows it to be used in wash-down applications. Simple, intuitive software makes controller configuration a snap. A wireless infrared communication port enables controller setup from a Pocket-PC or computer. Ethernet communication allows easy connection to plant networks. Application flexibility is assured with up to five analog inputs, math and logic functions and Accutune III tuning with fuzzy logic overshoot suppression.  The UDC3500 controller is easy to install, easy to configure, easy to operate and easy to own.



  • NEMA 4X - The UDC3500 controller faceplate is rated NEMA 4X/IP66 which allows it to be used in wash-down applications.  The front face of the controller will withstand a continuous spray of water at 65 gallons per minute from a 1 inch diameter nozzle for 5 minutes from a distance of 10 to 12 feet.
  • Three Universal Inputs -Three universal analog inputs can be configured to operate as 1 universal and 4 high level (4 to 20 ma) to provide 5 analog inputs.  Each input is isolated, and the controller will accept inputs from a carbon probe for carbon potential control or a feedback slidewire for position proportional control.
  • Two Loops of Control -The UDC3500 can be used as a single loop or dual loop controller and can be configured for internal cascade control.
  • PC Tools -Create configuration with the intuitive software program running on a pocket PC, a Desktop or a laptop computer.  Create and edit configurations live or off line and save in a reference file for future use or to download to other controllers.  The software is available in English, Spanish, Italian, German and French.
  • Infrared interface -The infrared interface provides a non-intrusive wireless interface connection with the controller and maintains the NEMA 4X/IP66 integrity.  No need to get access to the back of the controller to communicate with the instrument, no need to take your screwdriver and wire a communication cable.  You can duplicate an instruments configuration, upload or download a new configuration in just a matter of seconds, simply by pointing your pocket PC in the direction of the instrument.
  • Ethernet Communications -Industry standard Ethernet communications is available as an option on the UDC3500 controller.  This option uses Modbus TCP/IP to connect to other Ethernet networks allowing the user to monitor the process from almost anywhere.
  • Logic Gates -Five logic gates configurable as OR, NOR, AND, NAND, XOR, XNOR, or COMPARATOR.  Each gate has two inputs and one output.  Logic gates may be linked together to perform more complex functions.
  • Setpoint Programming -Enables you to program and store up to ten Ramp and ten Soak segments for setpoint programming.  Run or hold of program is keyboard or remote digital switch selectable.  Each Soak Segment may have a unique Guaranteed Soak Deviation value.  Each Ramp and Soak Segment can be configured to use any of four PID sets.
  • Multi language prompts -The UDC3500 display can be configured in five different languages, English, Spanish, Italian, German and French.
  • Security Lockout -User selectable 4-digit code is available to maximize process security.  Choose from any one of five levels to lock-out just a few functions or the entire keyboard.
  • Accutune III -Accutune III with fuzzy overshoot suppression recognizes both setpoint and load changes and is a standard feature on the UDC3500 Controller.  "Fast tune" will tune the process to reach temperature as quickly as possible while "Slow Tun" minimizes overshoot. 
  • Position Proportional control -Provides two relay outputs to position a drive motor.  The input circuit accepts a feedback slidewire to monitor the actual drive motor position, providing tighter control.
  • Math Algorithms -General math equations are provided that allow advanced functions such as a Feedforward Summer, Multiplier/Divider, Weighted Average, High/Low Select, Carbon Potential, Dewpoint, Relative Humidity, Adder/Subtractor, etc.  Simply choose the math function from a menu, no confusing function blocks.
  • Heater Break Alarm -Continuously checks the controller current output to insure the end element (heater) has not failed.  A failure will trigger an alarm.  
  • Thermocouple Diagnostics -In addition to the standard configurable upscale, downscale or failsafe output burnout selections, the condition of the thermocouple can be monitored to determine if it is good, failing or in danger of imminent failure. 




UDC3500 Datasheet


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