UT52A {1/8 DIN} Advanced Indicating Controllers

High-powered with a small footprint
(Rugged, reliable, high accuracy, feature loaded)


  • Large Active color display
  • Up to 4 analog inputs available
  • Ladder sequence programs can be built
  • 3 alarm independent common terminals available as standard
  • Up to 5 DOs (combinations available)
  • Universal Input
  • Dust-proof and drip-proof front panel (NEMA4*2 /IP56)
  • PID Control:
    • — 8 Built-in Control Modes
    • — 8 Built-in Control Types
    • Ladder Sequence Control
    • Fuzzy Logic Control
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  • Simple operation:
    • Bright & Easy to Read Active Color LCD Display
    • Auto-tunning
    • Scrolling Text
    • Navigation Guide & Navigation Keys
    • Programmable Function Keys
    • User Settable Default Values
    • Multiple Language Support
    • Compact Design
  • Communications
    • Modbus, Peer to peer
    • PC-Link & Ladder protocols and coordinated operation
    • Ethernet, RS-485, PROFIBUS-DP, CC-Link


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


The compact Yokogawa UT52A programmable digital Indicating controllers are designed to be used in variety of industrial applications such as: heating and cooling,in machinery, electrical applications such a power supplies and more. They are reliable and sophisticated digital indicating controllers that promote ease-of-use features and control capabilities to solve the most demanding and critical of applications. An easy-to-read, 14-segment large color LCD display, along with navigation keys, greatly increase the monitoring and operating capabilities of these advanced indicating controllers.

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A ladder sequence function is included as standard. The UT52A is available with 8 standard preset control functions: single-loop, loop, cascade, PID, ON/OFF and temperature control as well as 8 preset control algorithms. Three digital inputs and three digital outputs are included as standard with additional input/output configurations available as options.

  • Literature
  • Specifications
  • Accessories
Model: Yokogawa UT52A 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
Digital Inputs  
Number: 3 (Std) 5 (Max)
Type: SP No. Change, PID No. Change, A/M Change, etc
Digital outputs  
Number: 3 (Std) 5 (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
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: 21.6 to 28.0 VDC
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 15 VA
Operating Temp.: 0 to 40°C (32 to 104°F)
Storage Temp: -10 to 50°C (14 to 50°F)
Extreme temperature range: -20°C to 65°C (-4 to 149°F) Tropicalized or IP54 sealed units available
Relative Humidity: 95% (non condensing)
Weight: Max 0.5 kg
Case Dimensions  
Meter Face: 48 x 96 mm (1.9" x 3.8")
Case Depth: 65mm (2.59")
Cut out: 91.4 x 91.4mm (3.6×3.6")

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.

Configuration of ladder program: 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 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.