3331
 

Temperature converter, loop-powered - isolated

 

3331

 

  • Excellent accuracy, better than 0.05% of span
  • Slimline housing of 6 mm
  • Excellent EMC performance and 50/60 Hz noise suppression
  • Selectable < 30 ms / 300 ms response time
  • Pre-calibrated temperature ranges selectable via DIP-switches
  1. Overview + -

  2. Technical details + -

  3. Accessories + -


Application

  • The 3331 temperature converter measures a standard Pt100, TC J and K temperature sensor, and provides an isolated passive analog current output signal.
  • High 2 port isolation provides surge suppression and protects the control system from transients and noise.
  • The 3331 can be mounted in the safe area or in Zone 2 / Division 2 areas.
  • Approved for marine applications.

Technical characteristics

  • Flexibly loop powered by 5.5...35 VDC via connectors.
  • < 30 ms fast response time with simultaneous sensor error detection when selected.
  • Selectable 300 ms response time when signal dampening is needed.
  • Selectable internal/external CJC.
  • Excellent conversion accuracy in all available ranges, better than 0.05% of span.
  • Meeting the NAMUR NE21 recommendations, the 3331 provides top measurement performance in harsh EMC environments.
  • The device meets the NAMUR NE43 standard defining out of range and sensor error output values.
  • All terminals are protected against overvoltage and polarity error.
  • High galvanic isolation of 2.5 kVAC.
  • Excellent signal/noise ratio of > 60 dB.

Mounting / installation / programming

  • Selectable DIP-settings for easy configuration of more than 1000 factory calibrated measurement ranges.
  • The narrow 6 mm housing allows up to 165 units to be mounted per meter of DIN rail, without any air gap between units.
  • Wide ambient temperature range of -25...+70°C.

Data sheet & Manuals


Data sheet

Manuals

Manuals in Russian

Approvals & Certificates


ATEX certificate

IECEx certificate

FM certificate

UL certificate

DNV marine certificate

EAC declaration

EAC Ex certificate

Metrology Pattern Approval (MPA), Russia

Supplementary documentation


EU Declaration of Conformity

CCC statement

EMC data

Environmental Conditions

Operating temperature -25°C to +70°C
Storage temperature -40°C to +85°C
Calibration temperature 20...28°C
Relative humidity < 95% RH (non-cond.)
Protection degree IP20
Installation in Pollution degree 2 & meas. / overvoltage cat. II

Mechanical specifications

Dimensions (HxWxD) 113 x 6.1 x 115 mm
Weight approx. 70 g
DIN rail type DIN EN 60715/35 mm
Wire size 0.13...2.5 mm2 / AWG 26...12 stranded wire
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 5.5...35 VDC
Max. required power 0.80 W
Internal power dissipation 19 mW...0.8 W

Isolation voltage

Isolation voltage, test / working 2.5 kVAC / 300 VAC (reinforced)
Zone 2 / Div. 2 250 VAC

Response time

Response time (0...90%, 100...10%) < 30 ms / 300 ms (selectable)
Voltage drop 5.5 VDC
Signal / noise ratio Min. 60 dB
Programming DIP-switches
Signal dynamics, input 23 bit
Signal dynamics, output 18 bit
EMC immunity influence < ±0.5% of span
Extended EMC immunity: NAMUR NE21, A criterion, burst < ±1% of span
Incorrect DIP-switch setting identification 3.5 mA

Input specifications

RTD input

Temperature range, Pt100 -200...+850°C
Min. measurement range (span) 10°C
Accuracy: the greater of Better than 0.05% of span or 0.1°C
Temperature coefficient: the greater of 0.02°C/°C or ≤ ±0.01%/°C
Sensor current < 150 µA
Sensor cable resistance < 50 Ω per wire
Effect of sensor cable resistance (3-/4-wire) < 0.002 Ω / Ω
Sensor error detection Yes - selectable via DIP-switch
Broken sensor detection > 800 Ω
Shorted sensor detection < 18 Ω

TC input

Temperature range, TC J -100...+1200°C
Temperature range, TC K -180...+1372°C
Min. measurement range (span) - TC J & K 50°C
Accuracy: the greater of Better than 0.05% of span or 0.5°C
Temperature coefficient: the greater of 0.1°C/°C or ≤ ±0.01%/°C
Sensor cable resistance < 5 kΩ per wire
Cold junction compensation (CJC): Accuracy @ external Pt100 input Better than ±0.15°C
Cold junction compensation (CJC): Accuracy @ internal CJC Better than ±2.5°C
Internal CJC error detection Yes
External CJC error detection Yes - selectable via DIP-switch
Open Thermocouple detection Yes - selectable via DIP-switch

Output specifications

Common output specifications

Updating time 10 ms

Current output

Programmable signal ranges 4...20 and 20...4 mA
Load (@ current output) ≤ (Vsupply - 5.5) / 0.023 [Ω]
Load stability ≤ 0.01% of span / 100 Ω
Sensor error indication 3.5 mA or 23 mA / acc. to NAMUR NE43 or OFF

I.S. / Ex marking

ATEX II 3 G Ex ec IIC T4 Gc
IECEx Ex ec IIC T4 Gc
FM, US Cl. I, Div. 2, Gp. A, B, C, D T4 or Cl. I, Zone 2, AEx nA IIC T4
FM, CA Cl. I, Div. 2, Gp. A, B, C, D T4 or Cl. I, Zone 2, Ex nA IIC T4
EAC Ex 2Ex nA IIC T4 Gc X

Observed authority requirements

EMC 2014/30/EU
LVD 2014/35/EU
ATEX 2014/34/EU
RoHS 2011/65/EU
EAC TR-CU 020/2011
EAC Ex TR-CU 012/2011

Approvals

ATEX KEMA 10ATEX0147 X
IECEx KEM 10.0068X
c FM us FM17US0004X / FM17CA0003X
c UL us, UL 61010-1 E314307
EAC Ex RU C-DK.HA65.B.00355/19
DNV Marine TAA00001RW
 

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