Technical Specifications:

• Input Channels: 2 universal inputs (TC, RTD, mV, V, mA)
• Output Type: 1 relay output (SPDT)
• Power Supply: 100–240 V AC (50/60 Hz) — indicated by “10”
• Control Mode: ON/OFF control with PID option
• Display: 5-digit, 7-segment LED (14 mm digit height, red)
• Accuracy: ±0.1% of reading + 1 digit (DC voltage/current input)
• Input Types Supported: K, J, T, E, B, R, S, L, N thermocouples; Pt100, JPt100 RTDs; 0–100 mV, 0–5 V, 1–5 V, 0–10 V, 4–20 mA, 0–20 mA
• Control Output: 1 relay (3 A at 250 V AC, 30 V DC)
• Alarm Outputs: 2 alarm outputs (selectable: SP, LH, LL, DH, DL, deviation)
• Response Time: 250 ms (typ.)
• Operating Temperature: 0 to 50 °C (32 to 122 °F)
• Panel Cutout: 48 × 96 mm (1/8 DIN × 2, or 96 × 48 mm)
• Depth: 75 mm (2.95 in)
• Weight: Approximately 200 g (0.44 lb)
• Protection Rating: IP20 (front panel), IP10 (rear)

Functional Features:

• Universal Input: Any input channel accepts any sensor type (thermocouple, RTD, mV, V, mA)
• Heater Burnout Alarm (HBA): Detects open heater circuit in temperature applications
• Loop Break Alarm (LBA): Detects sensor disconnection
• Remote Setpoint (RSP): External setpoint via analog input or digital communication
• Manual Reset: Operator-initiated reset after alarm condition clears
• Event Memory: Records up to 100 events with timestamps
• Scaling: Programmable input and output scaling (linear, square root)

Performance Parameters:

• Input Impedance (Voltage): 10 MΩ minimum
• Input Impedance (Current): 250 Ω
• Relay Contact Rating: 3 A resistive at 250 V AC, 30 V DC
• Insulation Resistance: 100 MΩ minimum at 500 V DC
• Dielectric Strength: 1500 V AC for 1 minute (input to output to power)
• EMC Compliance: EN 61326-1
• Sampling Rate: 5 times per second

Structural Features:

• Ultra-compact 1/8 DIN format (48 × 96 mm)
• Snap-in mounting with friction fit
• Rear-mounted screw terminal block
• Transparent front cover with LED display window
• Low-profile design (75 mm depth) for shallow panels

Working Principle:
The UT35A receives process signals on its 2 universal input channels. The internal 16-bit A/D converter digitizes the signal, and the microprocessor applies linearization for thermocouple/RTD inputs. The PV is compared to the SP using ON/OFF or PID control logic. The relay output switches based on the control deviation. HBA and LBA functions continuously monitor input circuit integrity.

Advantage Highlights:

• Ultra-Compact Size: 1/8 DIN format saves 75% panel space versus 1/4 DIN controllers
• Universal Inputs: No need to stock multiple meter types; one model covers all sensor types
• Built-in HBA/LBA: Unique alarm functions prevent undetected sensor failures
• 100–240 V AC Operation: Wide power supply range eliminates need for external transformers in most regions
• Cost-Effective: Lower cost than UT55A while maintaining core control functionality

Applicable Industries:

• OEM equipment manufacturing
• HVAC systems
• Food processing equipment
• Packaging machinery
• Small-scale chemical batch processes
• Laboratory equipment
• Building automation

Installation Requirements:

• Panel cutout: 44 × 92 mm minimum, 48 × 96 mm nominal
• Mounting depth clearance: 75 mm from front of panel
• Use 22–14 AWG wire for terminal connections
• Ensure ambient temperature does not exceed 50 °C
• Provide adequate ventilation behind panel (minimum 50 mm clearance)

Usage Precautions:

• Verify input type setting matches actual sensor before applying power
• Do not exceed 3 A relay load rating
• Calibrate annually to maintain ±0.1% accuracy
• Do not install in direct sunlight or environments exceeding 50 °C ambient
• Use shielded cables for mV and thermocouple inputs to minimize noise