Honeywell UDC2800 Universal Digital Controller, Current Output, E-M Relay Plus Alarm, Standard Software, Inputs TC, RTD, mV, 0-5V, 1-5V, 0-10V, 0-20mA, 4-20mA

Unmatched application power includes a Bluetooth configuration interface, two universal analog inputs, and a math algorithm. When these components are combined with Accutune IIITM tuning with fuzzy logic overshoot suppression, the result is price/performance leadership. Application flexibility is assured by the universal analog inputs, universal AC power supply, two digital inputs, a maximum of two analog inputs and four digital outputs, RS485 Modbus RTU or Ethernet 10/100M Base-T TCP/IP communication protocols, simple configuration plus total field upgrade capability for any optional feature.

The UDC2800 has two analog inputs with a typical accuracy of ±0.15% of full-scale input and a typical resolution of 16 bits. Both analog inputs are sampled ten times per second (every 100 ms). The first, or Process Variable input, can be one of the various thermocouples, RTD, or linear actuations. Linear actuations have thermocouple, RTD characterization capability as a standard feature. Linear actuations also have square root capability. The optional second input is isolated and accepts the same actuations as input one. All actuations and characterizations are keyboard configurable. Cold junction compensation is provided for thermocouple type inputs. Upscale, downscale, or failsafe sensor break protection is keyboard configurable. A configurable digital filter of 0 to 120 seconds provides input signal damping.

One or two electromechanical alarm relays are available to activate external equipment when preset alarm setpoints are reached. Each of the two alarms can be set to monitor two independent setpoints. Each alarm setpoint can be either high or low alarm. The alarm type can be selected to be either of the inputs, the Process Variable, Deviation, Output, Shed from communications, PV rate of change, or to alarm on manual mode activation or a Current Output Open failure. It can also be used as an On or Off event at the beginning or end of a Ramp/Soak segment. The alarm hysteresis is configurable from 0 to 100% of range.