Novus TxIsoRail-HRT Manuals

NOVUS AUTOMATION 1/4 TxIsoRail-HRT TEMPERATURE TRANSMITTER - OPERATING MANUAL – V1.0x D INTRODUCTION The TxIsoRail-HRT is a configurable DIN rail mount temperature transmitter widely required in various industrial processes. Its universal input can be configured to read RTDs, thermocouples and mV signals. It converts the input signal into a 4-20 mA linear output proportional to the configured range. The TxIsoRail-HRT uses the HART® communication protocol over the 4-20 mA output current loop. The input and output are electrically isolated, enhancing their performance and user and system safety. SPECIFICATIONS Sensor input: User defined. The supported sensors are listed in Table 1, along with their minimum and maximum ranges. Thermocouples: Types J, K, R, S, T, N, E and B according to IEC 60584 (ITS-90). Impedance >> 1 MΩ Pt100: Excitation 0.15 mA, α= 0.00385, according IEC 60751 (ITS-90). Pt1000: Excitation 0.20 mA, α= 0.00385, according IEC 60751 (ITS-90). NTC R25: 10 kΩ ±1 %, β25/85 = 3435 Voltage: 0 to 50 mVdc. Impedance >> 1 MΩ Sensor Type Maximum Measurement Range Minimum Measurement Range Thermocouple K -150 to 1370 °C (-238 to 2498 °F) 50 °C (122 °F) Thermocouple J -100 to 760 °C (-148 to 1400 °F) 50 °C (122 °F) Thermocouple R -50 to 1760 °C (-58 to 3200 °F) 200 °C (392 °F) Thermocouple S -50 to 1760 °C (-58 to 3200 °F) 200 °C (392 °F) Thermocouple T -160 to 400 °C (-256 to 752 °F) 50 °C (122 °F) Thermocouple N -270 to 1300 °C (-454 to 2372 °F) 50 °C (122 °F) Thermocouple E -90 to 720 °C (-130 to 1328 °F) 50 °C (122 °F) Thermocouple B 500 to 1820 °C (932 to 3308 °F) 200 °C (392 °F) Pt100 -200 to 650 °C (-328 to 1202 °F) 30 °C (86 °F) Pt1000 -200 to 650 °C (-328 to 1202 °F) 30 °C (86 °F) NTC -30 to 120 °C (-22 to 248 °F) 10 °C (50 °F) Voltage 0 to 50 mV 3 mV Table 1 – Sensors accepted by the transmitter Switch-on delay: < 10 s with factory damping filter configured. The accuracy is only guaranteed after 15 min. Terms of reference: Ambient: 25 ° C (77 °F); voltage: 24 Vdc, load: 250 Ω. 10 minutes required for stabilization time after configuration. Temperature Effect: < 0.05 % / 25 °C (77 °F) Response time: Typical 6 s using factory damping filter. This is the maximum time between a temperature step being applied in the input and the output reaching 90 % of the corresponding value. HART Protocol Version: 7 RTD cable resistance effect: 0.005 °C / Ω Maximum allowable cable resistance for RTD: 25 Ω Accuracy: Calibration error in relation to sensor measuring range. Sensor Type CURRENT LOOP HART Typical Error Maximum Error Typical Error Maximum Error Pt100 (-200 to 650 °C) 0.08 % 0.15 % 0.05 % 0.15 % Pt1000 (-200 to 650 °C) 0.07 % 0.15 % 0.04 % 0.15 % K, J, R, S, T, N, E, B 0.07 % (*) 0.15 % (*) 0.04 % (*) 0.15 % (*) mV 0.07 % 0.15 % 0.04 % 0.15 % NTC 0.20 °C (0.36 °F) 0.45 °C (0.81 °F) 0.15 °C (0.27 °F) 0.45 °C (0.81 °F) Table 2 – Input accuracy (*) Add cold junction compensation: < ± 1 °C (1.8 °F). Power supply influence: < 0.005 % / V typical (percentage of the full measure range). Output (4-20 mA): 4-20 mA current, 2-wires; and proportional to the configured range. Output Resolution (4-20 mA): 0.25 µA Power supply: 8.5 to 36 Vdc (output 4-20 mA) Maximum load (RL): RL (max.) = (Vdc – 8.5) / 0.0215 [Ω] Where: Vdc = Power supply voltage (8.5 to 36 Vdc) Operating Temperature: -40 to 85 °C (-40 to 185 °F) Humidity: 0 to 90 % RH It features electrical isolation between input and output: 1.5 kVrms Internal protection against polarity inversion. Cold junction compensation for thermocouples. Connection Wire Cross Section: 0.14 to 1.5 mm² Screw Tightening: 0.8 Nm. Housing: ABS UL94-HB. Certifications: CE and HART®.