UP55A YOKOGAWA

UP55A Yokogawa Input module

Brand：Yokogawa Model number：UP55A

Country of origin: Japan Product weight：0.55kg

HS code：8538900000

Product Details：

Product Dimensions：

The Yokogawa UP55A is a high-performance 1/4 DIN size program controller designed for precise ramp and soak temperature as well as process control applications. Belonging to the UTAdvanced series, it features a bright, multi-color 14-segment LCD display that provides clear visual readouts of process variables, setpoints, and program pattern status. The UP55A combines advanced program control algorithms with built-in sequence control functions based on ladder logic, allowing it to handle both analog process control and digital logical operations within a single compact device.

Product Parameters

Dimensions: 1/4 DIN panel mount format ( $96 \times 96 \text{ mm}$ ) with a compact depth of $65 \text{ mm}$ .
Display: 14-segment color LCD display with dynamic active color changes for alarm states and status monitoring.
Program Capacity: Supports up to 30 program patterns and up to 300 program segments total.
Control Inputs: Universal inputs accepting thermocouples, RTDs, direct current, and direct voltage signals.
Measurement Accuracy: High indication accuracy of $\pm 0.1\%$ of reading.
Power Supply Voltage: $100-240 \text{ VAC}$ ( $+10\% / -15\%$ ), $50/60 \text{ Hz}$ , or optional $24 \text{ VAC/DC}$ .
Control Outputs: Configurable for relay contact, voltage pulse ( $12 \text{ VDC}$ for SSR), or current output ( $4-20 \text{ mA}$ ).
Communication Options: Supports RS-485 (Modbus/RTU, PC-link), Ethernet (Modbus/TCP), DeviceNet, PROFIBUS-DP, and CC-Link.
Enclosure Protection: IP66 rated front panel for dust and water splash protection.

Product Advantages

A key advantage of the Yokogawa UP55A is its dual functionality, merging program control with sequence control capabilities. By supporting sequence control programs using standard ladder logic, the controller reduces the need for external miniature PLCs and simplifies overall cabinet wiring.

The bright, customizable color display enhances operator usability by changing color dynamically during alarm conditions, making critical status changes instantly visible from a distance.

The ultra-compact $65 \text{ mm}$ mounting depth dramatically reduces space requirements inside control cabinets, making it easier to integrate into shallow panels.

Furthermore, the intuitive program pattern management allows operators to effortlessly configure complex thermal profiles involving multiple ramp, soak, and step transitions.

Important Considerations and Precautions

When installing and commissioning the Yokogawa UP55A, ensure that the input power supply matches the specified voltage rating marked on the module label to prevent electrical damage.

Proper shielding and grounding practices must be maintained for input sensor cables to protect high-precision measurements from electromagnetic interference in industrial environments.

When wiring universal input terminals, double-check signal types and polarity before applying power, as incorrect input settings can lead to sensor damage or erroneous control behavior.

The operating ambient temperature should be kept within the range of $0\text{°C}$ to $50\text{°C}$ , avoiding locations with direct exposure to intense heat sources or corrosive gases.

It is strongly recommended to use the LL50A Parameter Setting Software to backup and store all configured program patterns and controller parameter files for rapid recovery in maintenance scenarios.

Product Applications

The Yokogawa UP55A program controller is widely applied in industries requiring precise profile-based thermal or environmental control.

Heat Treatment Furnaces: Managing complex heating, soaking, and cooling temperature curves for metallurgy and metal processing.
Environmental Test Chambers: Controlling temperature and humidity profiles over time for reliability testing of electronics and automotive components.
Semiconductor Manufacturing: Regulating precise thermal processing steps during wafer fabrication and crystal growth operations.
Ceramic and Glass Kilns: Executing multi-segment firing profiles where precise temperature gradients prevent product cracking.
Chemical Batch Processing: Managing recipe-driven temperature cycles in reactors, autoclaves, and sterilization equipment.

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