THM501 PT100 MODBUS TEMPERATURE TRANSMITTER

Transcription

1 THM501 PT100 MODBUS TEMPERATURE TRANSMITTER INTRODUCTION The TekOn Electronics In Head 2-Wire Temperature Transmitters are specifically designed to meet the most rigorous requirements of operation in the industrial process environments. Due to their reduced dimensions they can be installed in the DIN Form B sensor connection head in place of traditional terminal blocks. The THM501 is an ultra-flexible universal temperature transmitter which accepts exclusively PT100 temperature sensors (Resistance thermometers with 2, 3 or 4-wire configuration), and make it available in a Modbus RTU slave register. The operating parameters like the sensor probe type, connection method, measuring range, fault value can be configured using the THM501 user friendly free software TekOn Configurator. KEY FEATURES PT100 sensor input Modbus RTU Slave protocol Installation in the connection head type DIN B Configurable over PC Fault detection and signalling according to NAMUR NE43 recommendation Continuous operating status monitoring and self-diagnostic High precision and accuracy in the whole range of operating temperatures Internal temperature sensor for temperature drift compensation Sensor cable resistance compensation Wide measurement range Page 1 of 5

2 BLOCK DIAGRAM TECHNICAL SPECIFICATIONS Input Resistance thermometer (RTD) Measured variable Temperature Sensor type PT100 Units ºC or ºF Connection 1 Resistance thermometer (RTD) in 2-wire, 3-wire or 4-wire system Sensor current <0.05 ma (50µA) Response time <500 ms Open-circuit monitoring Always active (cannot be disabled) Short-circuit monitoring Always active (cannot be disabled) Measuring range -200ºC to 850ºC Minimum measured span 50ºC (90ºF) Characteristic curve Temperature-linear Measuring accuracy Reference conditions: Auxiliary power 24V DC ± 1% Ambient temperature 23ºC (73,4ºF) Warming-up time >5min Error in the analog output N.A. (digital/analog converter) Digital measuring errors See table digital measuring errors Error due to internal cold junction <0.5ºC (0.9ºF) Influence of ambient temperature with resistance thermometers 0.06ºC (0.11ºF)/10ºC (18ºF) with thermocouples 0.6ºC (1.1ºF)/10ºC (18ºF) analog measuring error 0.02% of span/10ºc (18ºF) Page 2 of 5

3 Ambient conditions Ambient temperature range Storage temperature range Relative humidity -20 to 80ºC (-4 a 176ºF) -20 to 80ºC (-4 a 176ºF) 95%, without condensation Casing Material Nylon 66 Weight Approx. 50g Dimensions See Dimensional drawings Cross-selection of cables 2.5mm 2 Protection type IP40 Certificates and approvals EN IEC IEC IEC IEC Electrical equipment for measurement, control and laboratory use. EMC requirements. Electrostatic discharge immunity test Radiated, radio-frequency, electromagnetic field immunity test Electrical fast transient/burst/immunity test Surge immunity test Factory settings Sensor PT100 with 3-wire circuit Measuring range ºC (32 212ºF) Fault current NAMUR NE 43 Sensor offset 0ºC (0ºF) Sampling 0.0s Digital measuring accuracy Resistance thermometer (RTD) Sensor Range ºC (ºF) Digital accuracy ºC (ºF) PT to 850 (-328 to 1562) 0.1 (0.18) RS485 / Modbus Settings Baudrate 9600 bps Parity None Data Bits 8 Stop bits 2 Slave Address (Node Index) 1 Register Description Register Address Acquisition Mode 15 Temperature Format 18 Temperature Value 23 The digital accuracy is the accuracy after the analogue/digital conversion including linearization and calculation of the measured value. Page 3 of 5

4 DIMENSIONAL DRAWINGS & INSTALLATION DIAGRAM ELECTRICAL CONNECTIONS Page 4 of 5

5 SELECTION AND ORDERING DATA Partnumber PA Related Products PA PA PA Partname SARC1105 USB Configurator THP1217 PT100 Temperature Transmitter THW401 Universal Wireless Temperature Transmitter TekOn Electronics Phone: Fax: /9 site: DS.THM501.EN.V.1.00 Page 5 of 5