Technical Specifications‌

• Input type: 2-wire or 3-wire Pt100 RTD
• Lead resistance: maximum 100 Ω per wire
• Measuring current: approximately 1 mA
• Output: 4-20 mA (limited to ≤ 35 mA)
• Rated voltage: 12 … 35 V DC, loop powered
• Power consumption: approximately 0.4 W to 0.5 W
• Linearized mode: 25-375 °C
• Non-linearized mode: span 25-800 °C, zero -200-400 °C
• Fault detection: output ≥ 22 mA on sensor breakage
• Response time: 250 ms
• Dimensions: 20 × 119 × 115 mm
• Weight: approximately 150 g
• Explosion protection: ATEX II 1GD Ex ia IIC T4, IEC 60079-11, Zone 0/1/2

‌Functional Features‌

• Converts Pt100 resistance signals to a 4-20 mA standard output
• Selectable temperature linearization for wide-range or high-accuracy operation
• Sensor breakage detection with over-range fault output
• Field range setting through DIP switches, rotary switches, and potentiometers
• Galvanic isolation between field and system circuits

‌Application Scenarios‌

• Temperature monitoring in chemical, oil and gas, and pharmaceutical plants
• Safe transmission of field Pt100 signals to PLC and DCS systems
• Signal isolation to eliminate ground-loop interference

‌Working Principle‌

The barrier injects a small measuring current into the RTD and reads the resulting voltage, converting the resistance value into a temperature-linear 4-20 mA output while maintaining intrinsic-safety separation.

‌Installation Requirements‌

• Mount on a DIN rail in the control cabinet
• Use 3-wire connection to compensate lead resistance automatically
• For 2-wire connection, keep lead resistance within 100 Ω

‌Precautions‌

• Confirm the exact model designation, noting the digit 0 versus the letter O
• Enabling linearization fixes the range to 25-375 °C
• Verify the applicable ATEX and IECEx certification documents