PR Electronics 5437B – 2-Wire HART 7 Temperature Transmitter

Features

  • RTD, TC, potentiometer, linear resistance and bipolar mV input
  • Single or true dual inputs with sensor redundancy and drift detection
  • Wide ambient operating temperature of -50 to +85°C
  • Total accuracy from 0.014%
  • 2.5 kVAC galvanic isolation
  • Full assessment to IEC61508 : 2010 up to SIL 2/3
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PR Electronics 5437B – 2-Wire HART 7 Temperature Transmitter

Application

  • Measurement of temperature across a broad range of thermocouple (TC) and resistance temperature detector (RTD) types.
  • Conversion of a wide spectrum of linear resistance and potentiometer inputs.
  • Transformation of bipolar millivolt (mV) signals into 4 to 20 mA signals.
  • Integration into asset management systems.
  • Suitable for critical applications demanding high accuracy, sensor redundancy, and drift detection.

Technical Features

  • True dual-input transmitter with a compact 7-terminal design accommodating a wide range of dual-input combinations.
  • Redundancy for sensors: Automatically switches to the secondary sensor if the primary one fails, ensuring uninterrupted operation.
  • Sensor drift detection: Alerts when sensor variance exceeds user-defined limits, optimizing maintenance.
  • Dynamic variable mapping for additional process data beyond the primary variable, such as average, differential, and min./max. tracking for dual inputs.
  • Exceptional digital and analog signal accuracy across full input range and environmental conditions.
  • Extensive sensor calibration options including Callendar Van Dusen and custom linearizations.
  • Programmable input limits with real-time metering for enhanced process traceability and protection against out-of-range sensors.
  • Fully assessed for SIL 3 compliance per IEC 61508:2010 and enhanced EMC Functional Safety testing according to IEC 61236-3-1.
  • Complies with NAMUR NE21, NE43, NE44, NE89, NE95, and NE107 standards for diagnostic information.

Mounting/Installation

  • Designed for DIN form B sensor head mounting.
  • Configurable via standard HART communication interfaces or PR 5909 Loop Link.
  • Suitable for installation in zone 0, 1, 2 and zone 20, 21, 22 including M1 hazardous areas.

Specification

ENVIRONMENTAL CONDITIONS
Operating temperature -50°C to +85°C (standard) -40°C to +80°C (SIL)
Storage temperature -50°C to +85°C
Calibration temperature 23…25°C
Relative humidity < 99% RH (non-cond.)
Protection degree (encl./terminal) IP68 / IP00
MECHANICAL SPECIFICATIONS
Dimensions Ø 44 x 20.2 mm
Center hole diameter Ø 6.35 mm / ¼ in
Weight approx. 50 g
Wire size 1 x 1.5 mm2 stranded wire
Screw terminal torque 0.4 Nm
Vibration IEC 60068-2-6
2…25 Hz ±1.6 mm
25…100 Hz ±4 g
COMMON SPECIFICATIONS
Supply
Supply voltage 7.5*…30** VDC
Internal power dissipation ≤ 850 mW
Additional min. supply voltage when using test terminals 0.8 V
Min. load resistance at >37 V supply (Vsupply – 37) / 23 mA
Isolation voltage
Isolation voltage, test / working 2.5 kVAC / 42 VAC
Response time
Response time 70 ms
Programmable damping 0…60 s
Polarity protection All inputs and outputs
Warm-up time < 5 min.
Start-up time < 2.75 s
Programming Loop Link & HART
Write protection Jumper or software
Signal / noise ratio > 60 dB
Long-term stability, better than ±0.05% of span / year (±0.18% of span / 5 years)
Signal dynamics, input 24 bit
Signal dynamics, output 18 bit
Effect of supply voltage change < 0.005% of span / VDC
Accuracy See manual for details
EMC immunity influence < ±0.1% of span
Extended EMC immunity: NAMUR NE21, A criterion, burst < ±1%
INPUT SPECIFICATIONS
RTD input
RTD type Pt10…10000, Ni10…10000, Cu5…1000
Cable resistance per wire 50 Ω (max.)
Effect of sensor cable resistance (3-/4-wire) < 0.002 Ω / Ω
Sensor current < 0.15 mA
Sensor error detection None, Shorted, Broken, Shorted or Broken
TC input
Thermocouple type B, E, J, K, L, N, R, S, T, U, W3, W5, LR
Cold junction compensation (CJC) Constant, internal or external via a Pt100 or Ni100 sensor
Sensor error detection None, Shorted, Broken, Shorted or Broken
Linear resistance input
Measurement range / min. range (span) 0 Ω…100 kΩ / 25 Ω
Cable resistance per wire (max.) 50 Ω
Sensor current < 0.15 mA
Sensor error detection None, Broken
Potentiometer input
Potentiometer min….max. 10 Ω…100 kΩ
Measurement range / min. range (span) 0…100% / 10%
Cable resistance per wire (max.) 50 Ω
Sensor current < 0.15 mA
Sensor error detection None, Shorted, Broken, Shorted or Broken
mV input
Measurement range -800…+800 mV (bipolar) -100 to 1700 mV
Min. measurement range (span) 2.5 mV
Input resistance 10 MΩ
Sensor error detection None, Broken
OUTPUT SPECIFICATIONS
Common output specifications
Normal range, programmable 3.8…20.5 / 20.5…3.8 mA
Extended range (output limits), programmable 3.5…23 / 23…3.5 mA
Updating time 10 ms
Load (@ current output) ≤ (Vsupply -7.5)/0.023 [Ω]
Load stability < 0.01% of span / 100 Ω
Sensor error indication Programmable 3.5…23 mA
NAMUR NE 43 Upscale/Downscale > 21 mA / < 3.6 mA
HART protocol revisions HART 7 and HART 5
OBSERVED AUTHORITY REQUIREMENTS
EMC 2014/30/EU
RoHS 2011/65/EU
EAC TR-CU 020/2011
APPROVALS
ATEX DEKRA 16ATEX0047X
EU RO Mutual Recognition Type Approval MRA0000023
SIL SIL 2 / SIL 3 certified & fully assessed acc. to IEC 61508
NB
NAMUR NE95 report Please contact us
* / ** See manual for details

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