Endress+Hauser MT121 Specifications
TI00087R/09/EN/13.13
71227143
Products Solutions Services
Technical Information
iTEMP® TMT121
Temperature transmitter, PC programmable,
for installation on DIN rail according to IEC 60715
Universal input for RTD, thermocouple (TC),
resistance and voltage transmitters
Application
• PC programmable (PCP) temperature transmitter for converting
various input signals into an scalable 4 to 20 mA analog output signal
• Universal input for resistance thermometer (RTD), thermocouple (TC),
resistance transmitter (Ω) and voltage transmitter (mV)
• Online configuration using PC with configuration kit
(PC-software ReadWin® 2000 and USB-interface connection)
• DIN rail mounting according to IEC 60715
Your benefits
• Universally PC programmable for various input signals
• 2-wire technology, 4 to 20 mA analog output
• High accuracy in total ambient temperature range
• Fault signal on sensor break or short circuit, presettable to NAMUR NE 43
•EMC to NAMUR NE 21, CE
• UL recognized component to UL 3111-1
• Safe operation in hazardous areas
International approvals such as ATEX Ex ia, NEPSI, FM IS, CSA IS
• Ship building approval GL
• Galvanic isolation
• Output simulation
• Customer-specific linearization, linearization curve match
• Online configuration during measurement
TMT121
Function and system design
Measuring principle Electronic recording and conversion of various input signals in industrial temperature measurement.
Measuring system The iTEMP® TMT 121 DIN rail temperature transmitter is a 2-wire transmitter with an analog output.
It has measurement input for resistance thermometers (RTD) and resistance transmitters in 2-, 3- or
4-wire connection, thermocouples and voltage transmitters. The TMT 121 is set up using a
configuration kit (see accessories, → ä 8) and the free of charge setup software ReadWin® 2000.
Input
Measured variable Temperature (temperature-linear transmission behavior), resistance and voltage.
Measuring range Dependent on the sensor connection and input signal the transmitter evaluates a number of
different measurement ranges, see ’type of input’.
Type of input
Type of input Designation Measuring range limits Min. span
Resistance thermometer (RTD)
as per IEC 60751
as per DIN 43760
Resistance
transmitter
Thermocouple (TC)
as per IEC 584, part 1
Pt100
Pt500
Pt1000
Ni100
Ni120
Ni500
Ni1000
• Type of connection: 2-wire, 3-wire or 4-wire connection,
sensor current: ≤ 0.6 mA
• With 2-wire circuit, compensation of wire resistance possible (0 to 20 Ω)
• With 3-wire and 4-wire connection, sensor wire resistance up to max. 40 Ω per
wire
Resistance Ω 10 ... 400 Ω
Type B (PtRh30-PtRh6)
Type E (NiCr-CuNi)
Type J (Fe-CuNi)
Type K (NiCr-Ni)
Type N (NiCrSi-NiSi)
Type R (PtRh13-Pt)
Type S (PtRh10-Pt)
Type T (Cu-CuNi)
-200...+850 °C (-328...+1562 °F)
-200...+250 °C (-328...+482 °F)
-200...+250 °C (-328...+482 °F)
-60...+180 °C (-76...+356 °F)
-70...+270 °C (-94...+518 °F)
-60...+150 °C (-76...+302 °F)
-60...+150 °C (-76...+302 °F)
10 ... 2000 Ω
0...+1820 °C (+32...+3308 °F)
-200...+915 °C (-328...+1679 °F)
-200...+1200 °C (-328...+2192 °F)
-200...+1372 °C (-328...+2372 °F)
-270...+1300 °C (-454...+2372 °F)
0...+1768 °C (+32...+3214 °F)
0...+1768 °C (+32...+3214 °F)
-200...+400 °C (-328...+752 °F)
10 K
10 K
10 Ω
100 Ω
500 K
50 K
50 K
50 K
50 K
50 K
50 K
50 K
as per ASTM E988
as per DIN 43710
Voltage transmitter
(mV)
Type C (W5Re-W26Re)
Type D (W3Re-W25Re)
Type L (Fe-CuNi)
Type U (Cu-CuNi)
• Internal cold junction (Pt100)
• External cold junction: configurable value 0 to +85 °C (+32 to +185 °F)
• Cold junction accuracy: ± 1 K
• Sensor current = typ. 100 nA
Millivolt transmitter
(mV)
0...+2320 °C (+32...+4208 °F)
0...+2495 °C (+32...+4523 °F)
-200...+900 °C (-328...+1652 °F)
-200...+600 °C (-328...+1112 °F)
-10 ... 100 mV 5 mV
500 K
500 K
50 K
50 K
2 Endress+Hauser
TMT121
ENDRESS+HAUSER
TMT121
3
5
6
RTD
3
5
6
W
3
3
4
4
5
5
6
6
RTD W
3
6
3
6
RTD W
4
6
TC
6 5 4 3
+ -
2-wire 3-wire 4-wire
SETUP
socket
Removable
wiring plug
Removable
wiring plug
12 to 35 V
12 to 30 V Ex
4 to 20 mA
Output
Output signal Analog 4 to 20 mA, 20 to 4 mA
Signal on alarm • Measurement range undercut: Linear drop to 3.8 mA
• Exceeding measurement range: Linear rise to 20.5 mA
• Sensor breakage; Sensor short circuit1): ≤ 3.6 mA or ≥ 21.0 mA
Load Maximum load = (V
Linearization/ transmission
Temperature-linear, resistance-linear, voltage-linear
Power supply
behavior
Filter Digital filter 1. degree: 0 to 8 s
Galvanic isolation U = 2 kV AC (Input/output)
Intrinsinc current
≤ 3.5 mA
consumption
Current limit ≤ 23 mA
Switch-on delay 4 s (during power up I
= 3.8 mA)
a
Power supply
Electrical connection
- 12 V) / 0.022 A (current output)
A0020932-EN
Assignment of terminal connections
RTD sensor connection
Type of connection:
Terminal:636536534
Color: Red White Red Red White Red Red White White
2-wire 3-wire 4-wire
Supply voltage Ub= 12 to 35 V, protected against polarity reversal
1) Not valid for thermocouple
Endress+Hauser 3
Loading...