2-wire HART 7 temperature transmitter
6437A
- 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
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.
- 6437xxSx is suitable for the use in systems up to Performance Level “d” according to ISO-13849.
- 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).
- The 6437A can be mounted in zone 2 and zone 22 / Class I, Division 2, Groups A, B, C, D.
Data sheet & Manuals
Data sheet
- 6437A.pdf
- Latest version
Manuals
- 6437V103_UK.pdf
- 6437V102_UK.pdf
- 6437V101_UK.pdf
- 6437V100_UK.pdf
- Previous versions
- Latest version
Manuals in Russian
- 6437V103_RU.pdf
- 6437V102_RU.pdf
- 6437V101_RU.pdf
- 6437V100_RU.pdf
- Previous versions
- Latest version
Approvals & Certificates
ATEX certificate
- 6437A_18ATEX0135X_issue3.pdf
- 6437A_18ATEX0135X_issue2.pdf
- 6437A_18ATEX0135X_issue1.pdf
- 6437A_18ATEX0135X_issue0.pdf
- 6437A_18ATEX0101_issue1_PR.pdf
- Previous versions
- Latest version
IECEx certificate
- 6437AIEC_160029X_issue5.pdf
- 6437AIEC_160029X_issue4.pdf
- 6437AIEC_160029X_issue3.pdf
- 6437AIEC_160029X_issue2.pdf
- 6437AIEC_160029X_issue1.pdf
- Previous versions
- Latest version
Supplementary documentation
EU Declaration of Conformity
- 6437DoC_EU_101_UK.pdf
- 6437DoC_EU_100_UK.pdf
- Previous versions
- Latest version
UKCA Declaration of Conformity
- 6437DoC_UKCA_100_UK.pdf
- Latest version
Download Software
Order form
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 |
| 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 | 75 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 & UK SI 2016/1091
2014/30/EU |
| RoHS | 2011/65/EU & UK SI 2012/3032 |
| ATEX | 2014/34/EU & UK SI 2016/1107 |
| EAC | TR-CU 020/2011 |
| EAC Ex | TR-CU 012/2011 |
Approvals
| ATEX | DEKRA 18ATEX0135X |
| IECEx | IECEx DEK. 16.0029X |
| CSA | CSA 16.70066266 |
| c FM us | FM16US0287X / FM16CA0146X |
| INMETRO | DEKRA 16.0008 X |
| NEPSI | GYJ18.1057X |
| EAC Ex | EAEU KZ 7500361.01.01.08756 |
| EU RO MR Type Approval | MRA0000023 |
| SIL | SIL 2 / SIL 3 certified & fully assessed acc. to IEC 61508 |
NB
| * / ** | See manual for details |
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