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6437A

 

2-wire HART 7 temperature transmitter

 

  • RTD, TC, potentiometer, linear resistance and bipolar mV input
  • Single input, dual input or 2 channels (2x4 terminals)
  • 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
  1. Overview +

  2. Technical details +

  3. Accessories +

  4. Download Software +


Application

  • Temperature measurement of a wide range of TC and RTD types.
  • Conversion of wide span linear resistance and potentiometer inputs to 4...20 mA.
  • Conversion of bipolar mV signals to 4...20 mA.
  • Integration into asset management schemes.
  • Critical applications requiring superior accuracy and/or sensor redundancy and drift detection.

Technical characteristics

  • True dual input transmitter, accepts the widest range of dual input combinations.
  • Sensor redundancy - output automatically switches to secondary sensor in event of primary sensor failure, maintaining uptime.
  • Sensor drift detection - alerts when sensor differential exceeds user-defined limits, for maintenance optimization.
  • Dynamic variable mapping for process data in addition to the primary variable e.g. dual input features such as average, differential and min./max. tracking.
  • Groundbreaking digital and analog signal accuracy over full input span and ambient conditions.
  • Extensive sensor matching including Callendar Van Dusen and custom linearizations.
  • Programmable input limits with runtime metering ensure maximum process traceability and sensor out of range protection.
  • IEC 61508 : 2010 full assessment up to SIL 3 together with enhanced EMC Functional Safety testing to IEC 61236-3-1.
  • Meets NAMUR NE21, NE43, NE44, NE89 and NE107 compliant diagnostics information.

Mounting / installation / programming

  • DIN rail mounting with up to 84 inputs per meter.
  • Configuration via PReset using PR5909 Loop Link /HART modem, or by Asset Management tool (e.g. Pactware, AMS, HART communicator) for which all relevant DD, eDD and DTM files are available
  • The 6437A can be mounted in zone 2 and zone 22 / Class I, Division 2, Groups A, B, C, D.

Manuals


Data sheet


Declaration of Conformity


Safety note


CSA certificate


INMETRO certificate


NEPSI certificate


DNV marine certificate


Field device specification


EAC declaration


EAC Ex certificate


Metrology Pattern Approval (MPA)


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 IP20

Mechanical specifications

Dimensions (HxWxD) 109 x 23.5 x 104 mm
Weight (single input / dual input) 150 g / 160 g
Weight (2 channels) 185 g
Wire size 0.13...2.08 mm2 AWG 26...14 stranded wire
DIN rail type DIN EN 60715/35 mm
Screw terminal torque 0.5 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
Power dissipation, per channel ≤ 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
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
Basic accuracy, e.g. Pt100 ≤ ±0.04°C
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
Basic accuracy, e.g. TC K ≤ ±0.25°C
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
Basic accuracy ≤ ±1.6 μA (0.01% of full output span)
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
EAC Pending
RoHS 2011/65/EU

Approvals

ATEX DEKRA 18ATEX0135X
IECEx IECEx DEK. 16.0029X
CSA 70066266
c FM us FM16US0287X / FM16CA0146X
INMETRO DEKRA 16.0008 X
NEPSI GYJ18.1057X
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

* / ** See manual for details
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