Yokogawa temperature controller UT351 CONTROLLER[USED]

Description

Yokogawa UT351 is a classic 1/4 DIN (96×96mm) single-loop digital indicator regulator (thermostat) from Yokogawa. It features high precision PID control, universal input and red-green color display. It was discontinued in 2010 and its replacement model is UT35A.
I. Basic Specification and Status
Full model name: UT351 (suffixes such as -00, -02, -10 distinguish functions)
Dimensions: 96 (W) × 96 (H) × 100 (D) mm (panel opening 92×92 mm)
Status: Discontinued (September 29, 2010), recommended replacement: UT35A
Core positioning: Industrial single-loop temperature / process control, suitable for heating furnaces, ovens, heat treatment, injection molding and other scenarios
II. Model Code (Suffix Meaning) Table
Suffix section Meaning Common values
-0 Basic type 0: Standard type; 2: Heating / Cooling type; 3: With 24V circuit power supply
-0 Optional function 0: None; 1: Communication + Open-circuit alarm; 2: Only open-circuit alarm
Example: UT351-00 = Standard type, no additional functions; UT351-21 = Heating / Cooling type + Communication + Open-circuit alarm
III. Core specifications (New / Original)
1. Input (Universal Input, universal)
Supported: Thermocouple (K/J/E/T/S/R/B/N), Thermoresistor (Pt100/JPt100), DC voltage (mV/V), DC current (mA)
Accuracy: ±0.1% FS (at normal temperature)
Sampling period: 250 ms
Standard: 15 VDC circuit power supply (for two-wire transmitters)
2. Control output (standard 1 channel, optional 2 channels)
Type: Relay (250VAC/3A), SSR drive (12VDC/30mA), Analog (4–20mA/1–5V)
Control algorithm: PID + Self-tuning (AT) + Super (suppress overshoot) + Super2 (suppress oscillation)
Period: 1–999 seconds (relay); 1–99 seconds (SSR / analog)
Optional: Dual output control for heating / cooling (-2 suffix)
3. Alarm (standard 2 points, optional 3 points)
Type: Upper limit / Lower limit / Deviation / Standby / Rate alarm
Output: Relay contacts (250VAC/1A)
Function: Alarm delay, Alarm locking, Alarm retention
4. Display and operation
PV display: 4-bit LED, 20mm high, red and green dual color (normal green / alarm red)
SP display: 4-bit LED
Buttons: RUN/STOP, A/M (automatic / manual), UP/DOWN, SET
Standard: Remote transmission output (4–20mA/1–5V)
5. Power supply and environment
Power supply: 100–240 VAC, 50/60 Hz (wide voltage)
Power consumption: approximately 10 VA
Operating temperature: 0–50°C; Humidity: 5–95% RH (no condensation)
Insulation: Input / Output / Power supply 1500 VAC 1 minute