UT75A {1/4 DIN} Advanced Indicating Controllers

Enhanced Performance and Flexibility for demanding applications. Rugged, reliable, highly accurate, and feature loaded


  • Enhance productivity by managing a variety of scenarios
  • Reduce engineering costs and peripheral devices
  • A 14-segment, active (PV display color changing function) color LCD display, Two five-digit, high-resolution displays are possible
  • Quick setting function reducing downtime
  • A variety of arithmetic instructions and large capacity ladder programs
  • 2-loop control with a single controller
  • Advanced arithmetic instructions available
  • Universal I/O, eight control modes (dual-loop control, cascade control, etc)
  • Program pattern operation, PID control, heating/cooling control, feed forward control are included as standard
  • Auto-tuning (AT) Function, SUPER Function Suppresses Overshoot, SUPER2 Function Suppresses Hunting
  • Tuning Function
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  • 2-loop control with a single controller:
    • 2-loop synchronous and independent operation is available
    • Program pattern operation and constant value operation are available for 2-loop control
  • Arithmetic instructions and large capacity ladder programs:
    • 5 basic instructions and 111 application instructions
    • Ladder program capacity up to 1,000 steps
  • Managing a Variety of Recipes:
    • Switching between 20 Recipes
    • Program pattern consists of up to 20 segments
    • 2-loop program pattern can be operated
    • Easy to switch between recipes with a PLC
    • Since CC-Link, Profibus, and DeviceNet are supported, it is easy to link to a PLC that manages recipes
  • Reducing Engineering Costs and Peripheral Dev
    • Simplifying ladder programs, multi-line ladder programs such as numerical calculation can be turned into a single line using a custom ladder instruction
    • External calculators and sequence control circuits (relay, timer, etc.) can be reduced
    • Complex I/O offset calculation and alarm sequence control can be accomplished using a ladder program
      (Communication with a PLC is possible without using any program)
  • Communication
    • Ethernet, RS-485, Open network (PROFIBUS-DP, CC-Link, DeviceNet),Modbus/TCP, Modbus/RTU, peer-to-peer


  • Measurement, display, and control of temperature, pressure, and flow rate
  • Research and development facilities and manufacturing operations (heat treatment, washing, sterilizing, etc.)
  • Critical heating and cooling control


The UT75A digital indicating controllers employ an easy-to-read, 14-segment large color LCD display, along with navigation keys, that greatly increase monitoring and operating capabilities. The UT75 c/w 8 built-in control Modes and 9 Built-in control types and a ladder sequence function, included as standard. Fuzzy logic suppression for unparalled overshoot suppression and the new Super2 function utilizes a built-in operator experience and modern control theory to deliver fine control and suppress hunting.
The short depth of the controller helps save instrument panel space. The UT75A also support open networks such as Ethernet communication.

  • Literature
  • Specifications
  • Accessories
Model: Yokogawa UT75A Advanced Digital indicating controllers (programmable)
PV input
input Type: 1 Universal input (TC, RTD, mV, V, mA)
Indication accuracy ±0.1% of F.S.
Control scan period: 50, 100, 200 msec
PV/SP data display 14-segment, 5 digits, Bar graph LCD display
Control Outputs (MV)
Type: Relay, Voltage Pulse, Current
Algorithm: ON/OFF, PID (Continuous, Time-proportional), Heating/Cooling, Position-proportional
Analog Inputs
Number: 3(Std) 8(Max)
Type: SP No. Change, PID No. Change, A/M Change, etc
Digital outputs
Number: 3(Std) 8(Max)
Type: PV High, PV Low, Dev High, etc
Current transformer input
Number: 2
Number: 1
Type: PV, SP, OUT, etc
Remote (aux.) input
Number: 1 or 2
Type: 1 to 5 V, etc. Only 1 input can be changed to universal input when specified the /DR option
Preset Control Functions:
Number: 8
Type: single-loop, loop, cascade, PID, ON/OFF and temperature control as well as 8 preset control algorithms
Loop power supply
Number: 1
Type: 14.5 to 18.0 V DC
Number: 1
Type: RS-485, Ethernet, PROFIBUS-DP, CC-Link, DeviceNet
Other specifications
Power supply: 100 to 240 VAC (+10%, -15%) or 24 VAC/DC (+10%, -15%) (option)
Power consumption: Max 18 VA
Operating Temp.: 0 to 40°C (32 to 104°F)
Storage Temp: -10 to 50°C (14 to 50°F)
Relative Humidity: 95% (non condensing)
Weight: Max 0.5 kg
Case Dimensions
Meter Face: 96 x 96 mm (3.8 x 3.8")
Case Depth: 65mm (2.59")
Cut out: 92 x 92mm (+0.800)

PC-based Setup Parameters & Custom Computation Building Tools

For UTAdvanced Series Controllers
LL50A Parameter Setting Software

The LL50A Parameters Setting Software is designed to build and set parameters, ladder programs, and the like of the UTAdvanced digital indicating controllers from a PC. The tuning and monitoring of ladder programs are possible during communication with the controllers.

  • Parameter Setting Function
  • Tuning Function
  • Ladder Program Building Function
  • Network Profile Creating Function
LL200 connection image

Parameter Setting Display

This function is used to set the parameters of the main unit. There are setup parameters for setting the basic functions of a main unit controller and operation parameters used for setting functions necessary to operate the main unit. It is also possible to set them using the Setting wizard.

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

Program pattern setting function

This function is used to set the program pattern of the UP55A/UP52A

Monitoring function

Tuning/change With the PC connected to one controller, the tuning function tunes PID parameters by displaying PV input values (PV), target setpoints (SP), control output values (OUT), etc. on the PC screen. Furthermore, it also enables the PV, SP, and OUT values to be displayed as trend data and acquired together with the loop information and fixed registers in the Tuning window. Acquired trend data can be saved in a file of .csv format.

Monitoring/changing registers

The register monitoring function enables the main unit’s registers to be monitored and/or changed during ladder program debugging.

Upload/download/comparison function

This function downloads parameter data, program pattern data and/or ladder program data to the main unit, uploads it from the main unit, and compares it with the main unit data. You can specify all data, or individual data items, to be uploaded or downloaded.

File management/print function

This function enables you to save created parameter data, program pattern data and/or ladder program data in a file. It also allows data to be printed out for submission to the customer.

Ladder program building function

In ladder programs, there are various computations for input and output signals, and sequence processing can be built using four fundamental arithmetic operations, logical operation, temperature compensation factor calculation, and pressure compensation factor calculation and between input and output contacts. A ladder program consists of three parts: the input ladder calculation executed before control computation, and the output ladder calculation and the user ladder calculation performed after control computation. Each calculation section is respectively executed every control period. The sequence of calculation is: input, input ladder calculation, control computation, output ladder calculation, user ladder calculation, and output.

Building a ladder program

A ladder program is built by editing the default ladder programs provided for each control mode of system data. It is recommended that the user ladder calculation section be used if a sequence is 2 desired to be configured regardless of controller control computation. As the initial status, the default ladder programs are described in the input ladder calculation and output ladder calculation sections on a control mode basis. No program is written in the user ladder calculation section.