3331
Temperature converter, loop-powered - isolated
- 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
Manuals : 
Data sheet :
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.
Environmental Conditions
Specifications range -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 & measurement / 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 x 2.5 mm2 / AWG 26...12 stranded wire Screw terminal torque 0.5 Nm Vibration IEC 60068-2-6 : 2007 Vibration: 2...25 Hz ±1.6 mm Vibration: 25...100 Hz ±4 g Common specifications
Supply voltage 5.5...35 VDC Voltage drop 5.5 VDC Isolation voltage, test 2.5 kVAC Isolation voltage, working 300 VAC (reinforced) / 250 VAC (Zone 2, Div. 2) Signal / noise ratio > 60 dB Signal dynamics, input 23 bit Signal dynamics, output 18 bit Response time (0...90%, 100...10%) < 30 ms / 300 ms (selectable) EMC immunity influence < ±0.5% of span Extended EMC immunity: NAMUR NE 21, A criterion, burst < ±1% of span Incorrect DIP-switch setting identification 3.5 mA Input specifications
Temperature range, Pt100 -200...+850°C Accuracy, RTD: the greater of Better than 0.05% of span or 0.1°C Temperature coefficient, RTD: the greater of 0.02°C/°C or ≤ ±0.01%/°C Sensor current, RTD < 150 µA Sensor cable resistance, RTD < 50 Ω per wire Effect of sensor cable resistance (3-/4-wire), RTD < 0.002 Ω / Ω Sensor error detection, RTD Yes - selectable via DIP-switch Broken sensor detection > 800 Ω Shorted sensor detection < 18 Ω Temperature range, TC J -100...+1200°C Temperature range, TC K -180...+1372°C Accuracy, TC: the greater of Better than 0.05% of span or 0.5°C Temperature coefficient, TC: the greater of 0.1°C/°C or ≤ ±0.01%/°C Sensor cable resistance, TC < 5 kΩ per wire Cold junction compensation (CJC): Accuracy @ external Pt100 intput Better than ±0.15°C Cold junction compensation (CJC): Accuracy @ internal CJC Better than ±2.5°C Open Thermocouple detection Yes - selectable via DIP-switch Internal CJC error detection Yes External CJC error detection Yes - selectable via DIP-switch Output specifications
Programmable current ranges 4...20 and 20...4 mA Range limits 3.8...20.5 mA NAMUR NE43 Sensor error indication 3.5 mA or 23 mA / acc. to NAMUR NE43 or OFF Load resistance, current output ≤ (Vsupply - 5.5) / 0.023 [Ω] Updating time 10 ms Load stability, current output ≤0.01% of span / 100 Ω Approvals
EMC EN 61326-1 LVD 2006/95/EC EN 61010-1 ATEX 2004/108/EC KEMA 10ATEX0147 X IECEx KEM 10.0068X FM 3041043-C DNV Marine Stand. f. Certific. No. 2.4 GL V1-7-2 EAC TR-CU 020/2011 EN 61326-1 UL UL 61010-1