2-wire HART temperature transmitter

6437D

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.

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.

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 6437D can be mounted in zone 0, 1, 2 and zone 20, 21, 22 including M1 / Class I, Division 1, Groups A, B, C, D.

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

Supply
Supply voltage	7.5...30* 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 / 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%

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

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

ATEX	DEKRA 16ATEX0047X
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	Pending