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Yokogawa UT35-A13501-A/RET1/RLEX/SPD/Z
Product Series: UT35 Universal Indicating Controller
Product Introduction:
The UT35-A13501-A/RET1/RLEX/SPD/Z is a 1/8 DIN (96 × 48 mm) panel-mount universal controller with relay output, extended function, and specific configuration options. It accepts multiple input types and provides ON/OFF or PID control with relay and analog outputs. The suffix codes define: A13501 = input/output configuration, RET1 = relay output type, RLEX = extended relay function, SPD = serial communication option, Z = grounding terminal.
Detailed content
Working Principle:
The UT35 samples the input signal (TC, RTD, mV, mA, V, or frequency) via an internal ADC. The measured value is compared to the setpoint. For ON/OFF control, the relay activates when the process variable crosses the setpoint with configurable hysteresis. For PID control, the controller computes the output using proportional, integral, and derivative algorithms and drives the analog output accordingly.
Technical Specifications:
| Parameter | Value |
|---|---|
| Panel Size | 1/8 DIN (96 × 48 mm) |
| Input Types | TC (J, K, T, E, R, S, B, N), RTD (Pt100, JPt100, Cu50), mV, 4-20 mA, 1-5 V, Frequency (0-1 kHz) |
| Control Output | Relay: 2 SPDT (250 V AC / 30 V DC, 3 A); Analog: 4-20 mA DC (optional) |
| Control Modes | ON/OFF, PID (with auto-tuning) |
| Accuracy | ±0.1% FS + 1 digit (DC input), ±0.2% FS + 1 digit (TC/RTD) |
| Power Supply | 100-240 V AC or 24 V DC |
| Communication | RS-485 (Modbus RTU) — SPD option |
| Ground Terminal | Z = dedicated ground terminal |
| Alarm | 2 alarm points (AHH/ALL), relay output |
| Response Time | 250 ms (ON/OFF), 500 ms (PID) |
| Protection Rating | NEMA 4X / IP65 (front panel) |
| Ambient Temperature | 0°C to +55°C |
| Display | 4-digit 7-segment LED (red), 14-segment bar graph (green) |
Material Composition:
- Front panel: Polycarbonate (flame retardant)
- Case: ABS resin (UL94 V-0)
- Terminal block: Glass-filled PBT, UL recognized
Advantages:
- Universal input acceptance eliminates need for multiple controller types
- Auto-tuning PID simplifies commissioning
- 1/8 DIN size saves panel space
- RS-485 communication enables SCADA integration
- RET1 provides 2 SPDT relays for independent control and alarm
Applicable Industries:
Plastics, food processing, packaging machinery, HVAC, laboratory equipment, environmental monitoring, small-scale process control
Installation Requirements:
- Cut panel opening to 92 × 45 mm
- Secure with provided mounting clips
- Connect input wiring to terminals per the A13501 configuration
- Connect relay output to external loads — do not exceed 3 A per contact
- Connect RS-485 A/B lines for SPD communication option
- Connect Z terminal to clean earth ground
Usage Notes:
- Use the front panel keys for initial setup; use RS-485 for advanced configuration
- Auto-tuning should be performed with the process in normal operating conditions
- Set hysteresis for ON/OFF control to prevent relay chattering
- Verify input type selection matches the connected sensor before powering up
