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Resistance thermometer: Sensor: Pt100 / Pt1000 Max. configurable measurement zone: -200...+850 °C Min. measuring span: 10 K / 3,8 (only higher value applies)Ω Measurement current: Max. 0,2 mA Specification: -2, -3, 4-wire Max. output resistance: 50 / wireΩ (only in 3- / 4-wire-circuits) Configurable: 2-wire-circuit Standard: IEC 60751:2008
Potentiometer: Sensor: Reed-chains Max. configurable measurement zone: 0...100 % (1...50 k ) Ω Min. measuring span: 10 % (min. 1 k ) Ω Measurement current at measuring: Max. 0,1 mA Specification: 3-wire Max. output resistance: 50 / wireΩ Standard: IEC 60751:2008
Output (Analog)
Current signal: 4...20 mA loopTransmission behaviour: Temperature linearity according to IEC 60751Current range: 3,8...20,5 mA (NAMUR NE43)Fault signal: Configurable (NAMUR NE43) Downscale: <3,6 mA Upscale: >21,0 mA
Applications
The Digital Temperature-Transmitters are designed for universal application in plant- and machine engineering. They are also used in process technologies. Their interference resistance is exceptional and their accuracy is high. DTW-Transmitter also have extensive observation and self-monitoring functions.
Condensation head version: allowedCondensation rail version: only allowed when mounted vertically
Free fall: Fall height: 1,5 m Standard: IEC 60721-3-2:1997 DIN EN 60721-3-2:1998 EMC: Classification: Emission group 1, class B Interference resistance: Industrial sector (HF, field, HF wire, ESD, burst, surge) Standards: DIN EN 55011:2010 DIN EN 61326-2-3:2013 NAMUR NE21:2012, GL 2012 VI Teil 7
CE-sign: EMC-guideline: 2004/108/EG EN 61326: Emission (group 1, class B) Interference resistance for the industrial sector ATEX / IECEx: 94/9/EG / Areas exposed to explosion hazards (option)
Accuracy
To determine the total error all possible error types need to be taken into account. See also accuracy-diagram in the appendix. (P. 8)
Reference conditions: Calibration temperature: 23 °C ±3 K) Auxiliary power: U = 24 Vi_ref
Atmospheric pressure: 860...1060 hPa
Temperature-coefficient: Pt100, Pt1000, Potentiometer: ≤ ±0,01 % of range / 1 K Influence auxiliary power: Pt100, Pt1000, Potentiometer: ±0,005 % of range / 1 V
Long term drift: Pt100, Pt1000, Potentiometer: <0,1 % of range / year
Standard: IEC 61298-2
DTWDigital Temperature-Transmitter Page-3
Accuracy (continued)
Measurement error: Pt100, Pt1000: 0,2 K or 0,1 % (higher value applies) value range <200 K: 0,2 K value range >200 K: 0,1 % of range Potentiometer: 0,2 % of range (relative accuracy) 1 % of range (absolute accuracy) Standard: DIN EN 60770, NAMUR NE145
Special case NE145
Interference by high-frequency electromagnetic fields
Frequency range: 80...400 MHz: Up to 0,8 % deviation from rangeTransient influence: 1,5 % deviation from range(Burst, Surge, ESD)
Both versionsTime response: Closing time: Max. 3 s Heating period: Max. 4 min.
The data mentioned in this data sheet is only accurate after the end of the heating period has been reached!
Step response time: <0,4 sDamping: 1...60 s (variable configuration)Typical measurement range: 2-, 4-wire circuit: 20/s measurement value update 3-wire circuit / potentiometer: 5/s measurement value update
Monitoring: Sensor break monitoring: Configurable Standard: increasing current Sensor short circuit: Configurable Standard: increasing current Value range monitoring: Over-/understepping: Configurable (Standard: deactivated)
Load Diagram
Auxiliary power U : DC 8...35 VB
Load R : R ≤ (U - 8 V) / 0,0215 AA a B
with R in Ω and U in VA B
Ex-relevant connection values see under „Safty-related parameters”, p. 5
The allowed load depends on the voltage of the loop supply.
Auxiliary Power U in VB
Min. Voltage Operating-voltage
Ex-Devices Non-Ex-Devices
0 8 24 30 35
744
1023
1256
0
Load R
in Ω
A
Electrical Connection
mA - +
1 2
3 4
1 2
3 4
17,599
113,6
Dimensions (in mm)
Configuration of Connector Clamps
The dimensions of the head version are balanced for use with DIN-connecting heads type B with extended mounting space.
The rail version is suitable for all standard rails according to IEC 60715.
DTW Head Version DTW Rail Version
Input
Output4...20 mA-loop
Potentiometer
4-Wire
1
2
3
2
3
44
3
2
4
3
2
-
-
++
mA
3-Wire 2-Wire
Resistance Thermometer/Resistance Sensor
in
+
-
1 32 4
+-
3
1 4
2
+
+
2
4
1
3
-
-mA - +
1 2
3 4
ConnectionProgramming Unit
DTW Rail Version
DTW Head Version
+-
3
1 4
2
Ø 7
33
Ø 44
22,5
DTWDigital Temperature-Transmitter Page-4
DTWDigital Temperature-Transmitter Page-5
Safety-Related Parameters
Intrinsically Safe Connection Values for the Current Loop (4...20 mA)
Connector clamps + / - + / -
Voltage Ui DC 30 V DC 30 V
Current Ii 130 mA 130 mA
Power Pi 800 mW 750/650/550 mW
Effective internal capacitance Ci 18,4 nF 18,4 nF
Effective internal inductance Li 3,91 µH 3,91 µH
DTW-x-IADust-Ex-Application
DTW-x-IA, DTW-x-ICGas-Ex-Application
Parameters
Protection level Ex ia IIC/IIB/IIA, Ex ia IIIC or Ex ic IIC/IIB/IIA
Sensor Circuit
Concerning the Applied Standards:
Due to distance requirements of the applied standards, the IS power and signal circuit and the IS sensor circuit should be considered as being galvanically connected to each other.
Concerning Explosion Protection:
The intrinsically safe supply and signal circuit and the intrinsically safe sensor circuit must be considered as galvanically connected to each other (with regard to explosion protection).
Notes on the Tables:
U : Maximum voltage of any conductor against the other three conductorso
I : Maximum output current for the least favourable connection of the internal current limiting resistorso
P : U x I divided by 4 (linear characteristic)o o o
Internal L and C from table „Sensor Circuit“ are already taken into account.
Connector clamps 1 - 4 1 - 4
Voltage Uo DC 30 V DC 30 V
Current Io 6,1 mA 6,1 mA
Power Po 46 mW 46 mW
Max. external capacitance Co
IIC 30 nF 180 nF
IIB IIIC 0,520 µF 1,37 µF
IIA 1,70 µF 5,40 µF
Max. external inductance Lo
IIC 1 mH 2 mH
IIB IIIC 1 mH 2 mH
IIA 1 mH 2 mH
Characteristics Linear
DTW-x-ICEx ic IIC/IIB/IIA
DTW-x-IAEx ia IIC/IIB/IIA
Ex ia IIICParameters
DTWDigital Temperature-Transmitter Page-6
Safety-Related Parameters (Continued)
Terminals 1 - 4
Power Po
Gas-Ex-Application DTW-x-nAProtection Level Ex nA IIC/IIB/IIA
Parameters
Sensor Circuit
0,33 mWDC 3,3 V (maximal voltage limited at V9)0,1 mA (maximal current limited at D10)
Ambient Temperature Range
Application Ambient T emperature Range Temperature Class
Group II -40 °C ≤ T ≤ +85 °Ca T4
-40 °C ≤ T ≤ +70 °Ca T5
-40 °C ≤ T ≤ +55 °Ca T6
Ambient Temperature Range
Application Ambient T emperature Range Temperature Class Power Pi
Group II -40 °C ≤ T ≤ +85 °Ca T4 800 mW
-40 °C ≤ T ≤ +70 °Ca T5 800 mW
-40 °C ≤T ≤ +55 °Ca T6 800 mW
Group IIIC -40 °C ≤T ≤ +40 °Ca N / A (not applicable) 750 mW
-40 °C ≤T ≤ +75 °Ca N / A 650 mW
-40 °C ≤T ≤ +85 °Ca N / A 550 mW
Safety-Related Parameters for Model DTW-x-nA Gas-Ex-Application
Terminals + / -
Voltage Ui DC 35 V
Current Ii 21,5 mA
Gas-Ex-Application DTW-x-nAProtection Level Ex nA IIC/IIB/IIA