UT750 {1/4 DIN} Green Indicating Temperature Controllers

Green Series Temperature Controllers (1/4 DIN)
(Dual Loop Control Capability with Custom Computation)


  • Fast and accurate Tracks fast-changing signals at ±0.1% accuracy and at up to 50ms input sampling period.
  • Sharp and Large 5-digits LED display with 11 x 20 mm digits
  • 13 standard UT control modes, including single-loop, cascade, and dual-loop control.
  • Input Accuracy:±1% , control cycle 50 ms
  • Standard input and output contacts
    • — 7 Contact inputs
    • — 7 Contact outputs
    • Expandable up to 23 inputs and 23 outputs by connecting I/O expansion modules
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  • Simple operation:
    • Easy to understand hardcopy format and handy CD-ROM user’s manuals.
    • Easy parameter setting on a PC screen, enabling data to be transmitted through the front panel using an optical communication adapter.
  • Customized computing
    • 4 arithmetic operations, as well as logical
    • Pressure compensation
    • Switched-PV computations functions (LL200 PC-based Custom Computation Building Tool)
  • Communications
    • Modbus
    • PC-Link & Ladder protocols and coordinated operation.


  • Temperature control
  • Cascade applications
  • Dual loop control
  • CP computation control


The Yokogawa (1/4 DIN) UT750 is a sophisticated indicating controller with powerful control capabilities and custom computation functions. The UT750 features an easy-to-read numeric display, as well as an LCD display for setting parameters interactively. Control functions, computations and signal computation functions are easily configured via the front panel.

The UT750 uses fuzzy logic to provide "SUPER" overshoot suppression function, autotuning, and the "SUPER2" hunting suppress function provide unparalleled control of your process and are provided as standard features of the UT750.

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The UT750 auto-tuning provides reliable control that you require to monitor Electric furnaces, Heating & cooling and dual loop applications, where precise process control is needed.

  • Literature
  • Specifications
  • Accessories
Model: Yokogawa UT750 indicating controllers
PV/SP Data display: 5 digits / 5 digits with LCD display
PV inputs: 2 universal inputs (TCs, RTDs, mV, V)
Control scan period: 50, 100, 200 msec
Control loops: 1 or 2(cascade, dual)
Control Algorithms: ON/OFF, PID (Continuous, Time-proportional), Heating/Cooling, Position-proportional
Number of Setpoint (SP): 8
Control Computation: Target setpoint and PID parameter, Zone PID selection, Auto-tuning, "SUPER" function, "SUPER2" function, Preset output function, Control cycle time
Operation Mode switching: AUTO/MANUAL, RUN/STOP, REMOTE/LOCAL, CASCADE/AUTO/MANUAL, Output tracking ON/OFF
Parameter Setting Range: Proportional band, Integral time, Derivative time, ON/OFF control hysteresis, Preset output value, Output limiter, Rate of change limiter for output, Dead band of heating/cooling control, Dead band of position-proportional control
Control Outputs (MV) Select from 2 sets of Relays, Voltage Pulses or 4 to 20mA
Auxiliary Analog Output (4 to 20mA) 1 point, 2 points when MV is relay output
Digital Outputs 3 or 7
Digital Inputs
Number: 2 or 7
Loop power supply
Number: 1 point
Type: 15V ( Cannot use with auxiliary analog output )
Number: 1
Type: RS-485, MODBUS, PC-Link, Ladder, Coordinated operation protocol
Front Protection: IP55
Power supply: Rated voltage 100 to 240V AC, (±10%), 50/60Hz
Power consumption: Max 20 VA
General Approvals UL, CE, CSA
Power Supply Consumption: 90 to 264 V AC, max. 20VA
Operating Temperature: 0 to 50°C ( 40°C or less in close mounting side-by-side)
Relative Humidity: 20 to 90% (non condensing)
Storage Temperature: -25 to 70°C
Dimensions: 96W×96H×100D (From the front panel surface) (mm)
Mounting: Direct panel mounting; mounting bracket, one each for upper and lower mounting
Weight: 1kg

PC-based Setup Parameters & Custom Computation Building Tools

For Green Series Controllers
LL100 Light loader computing

The LL100 Parameter Setting Tool is a software package that enables you to set the functional configuration parameters (setup parameters) and operation parameters of a digital indicating controller and a program controller, as well as the program patterns of a program controller, on a PC. The tool lets you the followings:

  • Setting parameters
  • Uploading, downloading and comparing the parameters in the controllers
  • Saving and reading the parameters stored on the storage media
  • Printing out parameters
  • Multi-monitoring
LL200 connection image

Parameter Setting Display

Simple configuration and parameter help text. In addition to parameter setting, the following functions can be used on this display:

  • Uploading, downloading and comparing the parameters in the controller
  • Saving and reading the parameters stored on the storage media
  • Printing out parameters

Proper management of the setting file minimizes the downtime during maintenance and inspection.

Tuning Display

Trend display of measured values (PV), setting values (SP), and control output values (OUT). Manual tuning is much more efficient when trends of the process can be easily viewed. Auto-tuning and output value setting during manual operation are also possible.

Program Pattern Display

Used to create program patterns. The graphical pattern display allows event settings to be checked at a glance.

Multi-monitoring Function for Centralized Monitoring (up to 16 loops)

  • Easy-to-see trend display- Displays the trends of measured values (PV), setting values (SP), and control output values (OUT).
  • Easy-to-understand panel view- Alarms can be checked at a glance.
  • Automatic recognition for quick connection- Can view up to 16 loops.
  • User-friendly tuning display- PID and operational settings can be changed.
  • Saving in CSV format- Saved data can be readily used in Excel, etc.
LL200 Customized computing

The software package used to create custom computation programs and custom display functions for UT750/UP750. computation program upload and download, file management, debugging and printing functions are available. The function of LL100 is also included.

LL200 connection image

The LL200 Custom Computation Building Tool is a software package that enables you to configure the customized computing functions of a UT750 digital indicating controller or a UP750 program controller on a PC. With the tool, you can configure as many as 65 computation modules, including addition/subtraction/multiplication, absolute calculation, reciprocal calculation, maximum/minimum/average calculation, data holding, rate-of-change limitation, limiter operation, integration, timer operation, counter operation, line-segment approximation, inverse line-segment approximation, curved line-segment approximation, ratio calculation, first-order lag calculation, temperature/humidity calculation, temperature correction, pressure correction, output selection, data display, switching, logical AND calculation, logical OR calculation, logical NOT calculation, exclusive OR calculation, comparison, matching, and unmatching. This tool has the same parameter setting functions as the LL100 parameter setting tool.

LL200 screen image LL200 screen image
Module connection display Custom display selecting display