ABB CONTRANS T TEU471

Technical & Performance Specifications

• Supported Input Sensor Types: Pt100/Pt1000 RTD (2/3/4-wire), all standard thermocouple types (K, J, T, E, N, S, R, B)
• Input Measurement Resolution: 0.01°C for RTD; 0.1°C for thermocouple
• Output Standard Signal: 4 mA ~ 20 mA two-wire loop powered analog current
• Galvanic Isolation Voltage: 2500 V AC between input, output and power circuits
• Measurement Basic Accuracy: ≤±0.1% full scale
• Temperature Drift Coefficient: ≤0.005% FS / °C
• Loop Supply Voltage Range: 12 V DC ~ 30 V DC two-wire loop power supply
• Max Loop Load Resistance: 500 Ω at 24 V DC supply
• Response Time (t90): ≤300 ms
• Operating Ambient Temperature: -40°C ~ +70°C
• Protection Class: IP20 cabinet installation
• Mounting Standard: 35 mm EN60715 standard DIN rail
• Unit Dimensions: W 17.5 mm × H 100 mm × D 115 mm
• Unit Weight: 85 g
• Certifications: CE, UL, ATEX IECEx Zone 0/1/20 intrinsic safety approval

Function Features

1. Universal multi-sensor input auto-recognition function eliminates manual hardware jumpers during commissioning
2. 2500 V AC three-way full galvanic isolation blocks ground loop interference between field sensors and control room systems
3. Built-in cold junction compensation circuit for thermocouple measurement to eliminate cold junction temperature error
4. Configurable via ABB PC programming software or handheld HART configuration device for temperature range scaling
5. Overvoltage, reverse power, short-circuit output multi-layer circuit protection
6. Compact 17.5 mm narrow width design maximizes cabinet rack channel density

Working Principle

Material & Structural Composition

• Housing: Flame-retardant gray polycarbonate DIN rail enclosure with integrated ventilation slots
• Main PCB: Multi-layer FR4 industrial circuit board with reinforced isolation transformer barrier
• Terminal Blocks: Spring-cage quick-disconnect copper terminals supporting 0.5–2.5 mm² wire
• Internal Isolation Component: Epoxy encapsulated high withstand voltage isolation transformer

Advantage Highlights

1. ATEX intrinsic safety certification supports direct installation inside hazardous chemical, oil & gas field measurement cabinets
2. Three-way high voltage galvanic isolation completely eliminates industrial site ground loop signal noise
3. Universal sensor compatibility reduces spare part inventory types for factory maintenance stock
4. Narrow 17.5 mm body greatly improves cabinet channel layout density
5. Two-wire loop powered design simplifies field wiring layout with only two signal cables required
6. Ultra-low temperature drift maintains stable measurement precision under wide ambient temperature fluctuation

Applicable Industries

Installation Requirements

• Mounting Standard: Vertical 35 mm DIN rail mounting inside IP54+ sealed control cabinet
• Vertical Clearance: Minimum 20 mm top and bottom air gap for passive heat dissipation
• Sensor Wiring: Shielded twisted pair instrument cable for thermocouple/RTD input; matching thermocouple extension wire mandatory for thermocouple sensors
• Loop Wiring: Standard two-core shielded cable for 4–20 mA output loop, single-point ground shielding at control room side

Operation & Maintenance Notes

1. Re-calibration verification required every 24 months per ISO process control standards
2. Thermocouple extension wire must match thermocouple alloy type to avoid cold junction compensation error
3. Do not install TEU471 adjacent to high-power variable frequency drives without minimum 15 cm separation distance
4. Spring-cage terminals must fully clamp wire copper core; frayed wire strands will cause unstable measurement signal
5. Intrinsic safety wiring specifications must strictly follow ATEX zone wiring regulations for hazardous area deployment

9. KEBA CP253W