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Yokogawa UT450-04/Z
Product Series: UT450 Advanced Indicating Controller
Product Introduction:
The UT450-04/Z is a 1/4 DIN (96 × 96 mm) advanced panel-mount controller with 4 universal inputs, 3 relay outputs, 2 analog outputs, and Ethernet/RS-485/USB communication. The “04” denotes 4 control loops, and “Z” indicates the grounding terminal. It is designed for complex multi-variable process control in a compact footprint.
Detailed content
Working Principle:
The UT450 independently processes up to 4 input channels. Each channel runs its own control algorithm (ON/OFF or PID with auto-tuning). The controller compares each process variable to its setpoint and drives the corresponding relay and/or analog output. Communication via Ethernet, RS-485, or USB allows remote monitoring, parameter changes, and data logging.
Technical Specifications:
| Parameter | Value |
|---|---|
| Panel Size | 1/4 DIN (96 × 96 mm) |
| Number of Inputs | 4 universal inputs (independent) |
| Input Types | TC (all types), RTD (Pt100, JPt100, Cu50), mV, 4-20 mA, 1-5 V, Frequency |
| Control Outputs | 3 SPDT relays (250 V AC / 30 V DC, 3 A each) |
| Analog Outputs | 2 channels: 4-20 mA DC (isolated) |
| Control Modes | ON/OFF, PID (with auto-tuning), Heating/Cooling PID |
| Accuracy | ±0.1% FS + 1 digit (DC), ±0.2% FS + 1 digit (TC/RTD) |
| Display | Large LCD with dual 4-digit 7-segment displays + bar graph |
| Communication | Ethernet (100BASE-TX), RS-485 (Modbus RTU/TCP), USB (mini-B) |
| Power Supply | 100-240 V AC or 24 V DC |
| Ground Terminal | Z = dedicated ground terminal |
| Protection Rating | NEMA 4X / IP66 (front panel) |
| Ambient Temperature | 0°C to +55°C |
| Data Logging | Built-in SD card slot (optional) — up to 10,000 data points per channel |
Material Composition:
- Front panel: Polycarbonate (flame retardant, UV resistant)
- Case: ABS resin (UL94 V-0)
- Terminal blocks: Glass-filled PBT, UL recognized, screw-clamp type
Structure Features:
- Large LCD display showing all 4 process values simultaneously
- Front panel keys with lock function for parameter protection
- Dual-color bar graph for trend visualization
- SD card slot for data logging
- USB port for local configuration and firmware update
Advantages:
- 4 independent control loops in a single 1/4 DIN instrument
- Ethernet connectivity enables web-based monitoring and control
- Auto-tuning PID with heating/cooling control
- Data logging with SD card eliminates need for external recorder
- Large display improves readability in control rooms
Applicable Industries:
Chemical processing, pharmaceutical manufacturing, food and beverage, power generation, water treatment, HVAC, plastic molding, semiconductor manufacturing
Installation Requirements:
- Cut panel opening to 92 × 92 mm
- Mount with DIN clips or screws
- Connect all 4 input channels to respective terminals
- Wire relay outputs to external actuators, alarms, or interlocks
- Connect Ethernet cable to RJ-45 port for network integration
- Connect Z terminal to clean earth ground
Usage Notes:
- Configure each loop independently using front panel or PC software (UTAdvanced)
- Use auto-tuning only when the process is stable — do not initiate during startup transients
- Set communication parameters (IP address, Modbus slave ID) before connecting to SCADA
- Back up parameters to SD card periodically
- Do not block the front panel ventilation slots
