PR Electronics 5437A – 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 for use in SIL 2/3 applications
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PR Electronics 5437A – 2-Wire HART 7 Temperature Transmitter

Application

  • Measures temperature across a wide range of thermocouple (TC) and resistance temperature detector (RTD) types.
  • Converts a broad spectrum of linear resistance and potentiometer inputs.
  • Converts bipolar millivolt (mV) signals to 4-20 mA.
  • Integrates seamlessly into asset management systems.
  • Ideal for critical applications requiring high accuracy, sensor redundancy, and drift detection.

Technical Features

  • True dual-input transmitter with a compact 7-terminal design supporting various input combinations.
  • Redundancy with automatic switching to a secondary sensor in case of primary sensor failure to maintain operational continuity.
  • Sensor drift detection notifies when sensor differential exceeds user-set limits, optimizing maintenance.
  • Dynamic variable mapping for additional process data beyond primary variables, offering features like average, differential, and min./max. tracking.
  • High accuracy in both digital and analog signal processing across full input range and environmental conditions.
  • Comprehensive sensor compatibility including Callendar Van Dusen and custom linearizations.
  • Programmable input limits and runtime metering ensure precise process monitoring and protect against out-of-range sensor readings.
  • Certified according to IEC 61508:2010 up to SIL 3 with enhanced EMC Functional Safety testing to IEC 61236-3-1.
  • Compliant with NAMUR NE21, NE43, NE44, NE89, NE95, and NE107 standards for diagnostics information.

Mounting / Installation

  • Designed for DIN form B sensor head mounting.
  • Configurable via standard HART communication interfaces or PR 5909 Loop Link.
  • Suitable for mounting in zone 2 and 22 / Class I, Division 2, Groups A, B, C, D environments.

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*…48** 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 / 55 VAC
Response time
Response time 70 ms
Programmable damping 0…60 s
Polarity protection All inputs and outputs
Write protection Jumper or software
Warm-up time < 5 min.
Start-up time < 2.75 s
Programming Loop Link & HART
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 18ATEX0135X
IECEx IECEx DEK. 16.0029X
CSA 70066266
c FM us FM16US0287X / FM16CA0146X
INMETRO DEKRA 16.0008 X
NEPSI GYJ18.1054X
EAC Ex RU C-DK.GB.98.V.00192
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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