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
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.
Connections
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.
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Environmental Conditions
Specifications range.......................................
Storage temperature......................................
Calibration temperature.................................
Relative humidity............................................
Protection degree...........................................
Installation in..................................................
-25°C to +70°C
-40°C to +85°C
20...28°C
< 95% RH (non-cond.)
IP20
Pollution degree 2 &
measurement / overvoltage
cat. II
Mechanical specifications
Dimensions (HxWxD).....................................
Weight approx................................................
DIN rail type...................................................
Wire size........................................................
Screw terminal torque....................................
Vibration.........................................................
Vibration: 2...25 Hz........................................
Vibration: 25...100 Hz....................................
113 x 6.1 x 115 mm
70 g
DIN EN 60715/35 mm
0.13 x 2.5 mm2 / AWG 26...12
stranded wire
0.5 Nm
IEC 60068-2-6 : 2007
±1.6 mm
±4 g
Common specifications
Supply
Supply voltage............................................... 5.5...35 VDC
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...................................................
Internal consumption......................................
Signal / noise ratio.........................................
Programming.................................................
Signal dynamics, input...................................
Signal dynamics, output.................................
EMC immunity influence................................
Extended EMC immunity: NAMUR
NE 21, A criterion, burst.................................
Incorrect DIP-switch setting
identification...................................................
5.5 VDC
19 mW...0.8 W
> 60 dB
DIP-switches
23 bit
18 bit
< ±0.5% of span
< ±1% of span
3.5 mA
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 DIPswitch
Open Thermocouple detection....................... Yes - selectable via DIPswitch
Output specifications
Common output specifications
Updating time................................................. 10 ms
Current output
Signal range...................................................
Programmable signal ranges.........................
Load (@ current output).................................
Load stability..................................................
0...23 mA
4...20 and 20...4 mA
≤ (Vsupply - 5.5) / 0.023 [Ω]
≤0.01% of span / 100 Ω
Sensor error indication................................... 3.5 mA or 23 mA / acc. to
NAMUR NE43 or OFF
Observed authority requirements
EMC............................................................... 2014/30/EU
LVD................................................................ 2014/35/EU
RoHS.............................................................. 2011/65/EU
Approvals
ATEX 2014/34/EU.......................................... KEMA 10ATEX0147 X, II 3 G
Ex nA IIC T4 Gc
IECEx............................................................. KEM 10.0068X
FM.................................................................. 3041043-C
DNV Marine.................................................... Stand. f. Certific. No. 2.4
GL.................................................................. V1-7-2
EAC................................................................ TR-CU 020/2011
UL................................................................... UL 61010-1
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 DIPswitch
Broken sensor detection................................ > 800 Ω
Shorted sensor detection............................... < 18 Ω
3331-042916
TC input
Temperature range, TC J............................... -100...+1200°C
Temperature range, TC K.............................. -180...+1372°C
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