Mid-level Temperature Controller UT55A/UT52A

8 Built-in Control Modes

The control mode allows easily configuring settings and making changes with parameters.

• Single-loop control

• Cascade primary-loop control

• Cascade secondary-loop control

• Cascade control

• Loop control for backup

• Loop control with PV switching

• Loop control with PV auto-selector

• Control with PV-hold function

8 Built-in Control Types

• PID control

• ON/OFF control (1 point of hysteresis)

• ON/OFF control (2 points of hysteresis)

• Two-position, two-level control

• Heating/cooling control

• Sample PI control

• Batch PID control

• Feedforward control

For the correspondence between the above control mode and control types for each model, please refer to the specifications of each model.

Ladder Sequence Control

With built-in ladder sequence control, the range of applications are dramatically increased. This feature is standard in all the UTAdvanced controllers (except UM33A). The ladder sequence control function can replace a small PLC required by the application. Sequence control and PID control can be performed simultaneously.

• Monitoring and control of external machinery
  E.g.: Lamps, switches, timers

• Solve digital input/output logic functionality easily.
  Number of basic command types: 13
  Number of application command types: 73

[Example of ladder instruction]	[Example of ladder programming]

Application Examples of Ladder Sequence Program

Alarm Sequence Control Circuits Can be Reduced
The ladder sequence program is built in the UTAdvanced as standard. The ladder sequence function enables monitoring and controlling peripheral devices such as relays, thus making it possible to reduce costs.

[Conventional] Alarm action was built by a sequence control circuit (relay, timer, etc.) outside of the controller.

[UTAdvanced] Alarm action is built by the ladder sequence program inside the UTAdvanced, thus making it possible to reduce costs.

Host System Load is Reduced

[Conventional] Various types of analog data were captured into the host system (PLC, etc.) and calculated, and the results were processed by the field controller for control via a command.

[UTAdvanced] The UTAdvanced with up to 4 analog inputs* enables various types of analog data to be captured directly into the controller and calculated by the ladder program, thus reducing the system-building load of the host. Action: Various types of analog data were captured into the host system (PLC, etc.) and calculated, and the results were processed by the field controller for control via a command. * In the case of the UT55A

Universal Input/Output
Select Input and Output Types via Configuration

Universal Input

Select from TC, RTD, mV/DC voltage and DC current.
(DC current input: No shunt resistor required)

The input type and range is user selectable via the front panel or by using the LL50A parameter setting software.

• ±0.1% Indication Accuracy.

• Connect up to two 2-wire transmitters simultaneously.

All instruments have a 15 V Loop Power Supply (15 V LPS) for a transmitter. In addition, a 24 V LPS is also available simultaneously for some instruments as optional function.