Endress+Hauser MT85 Specifications
TI00134R/09/EN/04.17
71362820
Products Solutions Services
Technical Information
iTEMP TMT85
Dual Input Temperature Transmitter
with FOUNDATION Fieldbus™ communication
Application
• Temperature transmitter with 2 universal input channels and
FOUNDATION Fieldbus™ protocol for the conversion of
different input signals into digital output signals
• The temperature transmitter stands out due to signal
reliability, long-term stability, high precision and advanced
diagnostics (important in critical processes)
• For the highest level of safety, availability and risk reduction
• Universal input usable for resistance thermometer (RTD),
thermocouple (TC), resistance transmitter (Ω), voltage
transmitter (mV)
• DIN B style transmitter to fit in the smallest terminal heads or
in remote housings in accordance with DIN EN 50446
• Optional installation in field housings even for use in
Ex d areas
• Mounting bracket pipe or wall for the field housing
Your benefits
• Easy and standardized communication via FOUNDATION
Fieldbus™ H1
• Straightforward design of measuring points in Ex-areas
through FISCO/FNICO conformity in accordance with
IEC 600079-27
• Safe operation in hazardous areas thanks to international
approvals such as FM IS, NI; CSA IS, NI; ATEX Ex ia, Ex nA
for intrinsically safe installation in zone 1 and zone 2
• High accuracy through sensor-transmitter matching
• Reliable operation with sensor monitoring and device
hardware fault recognition
• Several mounting versions and sensor connection
combinations
• Rapid no-tools wiring due to optional spring terminal
technology
iTEMP TMT85
RTD/TC
1 x RTD/TC /
2 x RTD/TC
RTD/TC
m
n
0 - 10 bar
0 - 10 bar
Visualisation and monitoring
e. g. P View, FieldCare
and diagnostic software
High speed Ethernet
(HSE) 100 Mbit/s
32 devices per segment
Field controller
linking
device
ENDRESS+HAUSER
ENDRESS+HAUSER
linking
device
linking
device
H1
31.25 kbit/s
H1 IEC 61158-2
H1 FISCO
Measuring point with
installed TMT85
Measuring point with
installed TMT85
Function and system design
Measuring principle Electronic recording and conversion of various input signals in industrial temperature measurement.
Measuring system
A0007667
Application examples
m
Two sensors with measuring input (RTD or TC) in remote installation with the following advantages: drift warning,
sensor backup function and temperature-dependent switching
n
Built-in head transmitter - 1 x RTD/TC or 2 x RTD/TC as redundancy
Endress+Hauser is a producer of a wide range of resistance thermometers, thermocouples and
matching thermowells.
In conjunction with these components, the temperature head transmitter forms a complete measuring
point for various applications in the industrial sector.
Device architecture
System integration via FOUNDATION Fieldbus™
2 Endress+Hauser
A0007668-EN
iTEMP TMT85
The temperature head transmitter is a two-wire device with two measuring inputs. Using
FOUNDATION Fieldbus™, the device transfers converted signals from resistance thermometers and
thermocouples in addition to other resistance and millivolt signals. The device is powered via the
FOUNDATION Fieldbus™ H1 bus and can be installed as an intrinsically safe apparatus in zone 1
hazardous areas. The device is used for instrumentation purposes in the terminal head form B as per
DIN EN 50446. Data transfer takes place via the following function blocks:
• 2 x 3 analog input (AI),
• 1 x standard PID controller (PID) and
• 1 x input selector (ISEL).
Sensor diagnosis functions
Sensor diagnoses such as cable open circuit, short-circuit, cable corrosion, wiring error and device
hardware error are supported. In addition, the work area of the sensor and the ambient temperature
are monitored.
2-channel functions
These functions increase the reliability and availability of the process values:
• Sensor backup switches to the second sensor if the primary sensor fails.
• Drift warning or alarm if the deviation between sensor 1 and sensor 2 is less than or greater than a
predefined limit value.
• Temperature-dependent switching between sensors which have advantages in different ranges.
Input
Measured variable Temperature (temperature linear transmission behavior), resistance and voltage.
Measuring range The transmitter records different measuring ranges depending on the sensor connection and input
signals (see "Type of input").
Type of input It is possible to connect two sensors which are independent of each other. The measuring inputs are
not galvanically isolated from each other.
Type of input Designation Measuring range limits
Resistance thermometer
(RTD)
as per IEC 60751
(α = 0.00385)
as per JIS C1604-81
(α = 0.003916)
as per DIN 43760
(α = 0.006180)
as per Edison Copper Winding
No.15 (α = 0.004274)
as per Edison Curve
(α = 0.006720)
as per GOST
(α = 0.003911)
Pt100
Pt200
Pt500
Pt1000
Pt100
Ni100
Ni120
Cu10
Ni120
Pt50
Pt100
-200 to +850 °C (-328 to +1562 °F)
-200 to +850 °C (-328 to +1562 °F)
-200 to +250 °C (-328 to +482 °F)
-200 to +250 °C (-238 to +482 °F)
-200 to +510 °C (-328 to +950 °F)
-60 to +250 °C (-76 to +482 °F)
-60 to +150 °C (-76 to +302 °F)
-100 to +260 °C (-148 to +500 °F)
-70 to +270 °C (-94 to +518 °F)
-200 to +1100 °C (-328 to +2012 °F)
-200 to +850 °C (-328 to +1562 °F)
as per GOST
(α = 0.004280)
Cu50, Cu100
Pt100 (Callendar-Van
Dusen)
Polynomial nickel
Polynomial copper
-200 to +200 °C (-328 to +392 °F)
10 to 400 Ω
10 to 2000 Ω
10 to 400 Ω
10 to 2000 Ω
10 to 400 Ω
10 to 2000 Ω
Endress+Hauser 3
Type of input Designation Measuring range limits
• Connection type: 2-wire, 3-wire or 4-wire connection, sensor current: ≤ 0.3 mA
• For 2-wire circuit, compensation for wire resistance possible (0 to 30 Ω)
• For 3-wire and 4-wire connection, sensor wire resistance up to max. 50 Ω per wire
iTEMP TMT85
Resistance transmitter Resistance Ω 10 to 400 Ω
Thermocouples (TC)
as per IEC 584, Part 1
as per ASTM E988
as per DIN 43710
as per GOST
R8.8585-2001
Voltage transmitter (mV) Millivolt transmitter
Type A (W5Re-W20Re)
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)
Type C (W5Re-W26Re)
Type D (W3Re-W25Re)
Type L (Fe-CuNi)
Type U (Cu-CuNi)
Type L (NiCr-CuNi)
• 2-wire connection
• Internal cold junction (Pt100, Class B)
• External cold junction: value adjustable from -40 to +85 °C (-40 to +185 °F)
• Maximum sensor resistance 10 kΩ (if the sensor resistance is greater than 10 kΩ, an error message is output in
accordance with NAMUR NE89)
(mV)
0 to +2500 °C (+32 to +4532 °F)
+40 to +1820 °C (+104 to +3308 °F)
-270 to +1000 °C (-454 to +1832 °F)
-210 to +1200 °C (-346 to +2192 °F)
-270 to +1372 °C (-454 to +2501 °F)
-270 to +1300 °C (-454 to +2372 °F)
-50 to +1768 °C (-58 to +3214 °F)
-50 to +1768 °C (-58 to +3214 °F)
-260 to +400 °C (-436 to +752 °F)
0 to +2315 °C (+32 to +4199 °F)
0 to +2315 °C (+32 to +4199 °F)
-200 to +900 °C (-328 to +1652 °F)
-200 to +600 °C (-328 to +1112 °F)
-200 to +800 °C (-328 to +1472 °F)
10 to 2000 Ω
+500 to +1820 °C (+932 to +3308 °F)
-200 to +800 °C (-328 to +1472 °F)
-20 to 100 mV
Recommended temperature range:
0 to +2500 °C (+32 to 4532 °F)
-150 to +1000 °C (-238 to +1832 °F)
-150 to +1200 °C (-238 to +2192 °F)
-150 to +1200 °C (-238 to +2192 °F)
-150 to +1300 °C (-238 to +2372 °F)
+50 to +1768 °C (+122 to +3214 °F)
+50 to +1768 °C (+122 to +3214 °F)
-150 to +400 °C (-238 to +752 °F)
0 to +2000 °C (+32 to +3632 °F)
0 to +2000 °C (+32 to +3632 °F)
-150 to +900 °C (-238 to +1652 °F)
-150 to +600 °C (-238 to +1112 °F)
When assigning both sensor inputs, the following connection combinations are possible:
Sensor input 1
Sensor
input 2
RTD or resistance
transmitter, 2-wire
RTD or resistance
transmitter, 3-wire
RTD or resistance
transmitter, 4-wire
Thermocouple (TC),
voltage transmitter
RTD or resistance transmitter, 2-wire
  - Â
  - Â
----
   Â
RTD or resistance transmitter, 3-wire
RTD or resistance transmitter, 4-wire
Thermocouple
(TC), voltage
transmitter
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iTEMP TMT85
Output
Output signal • FOUNDATION Fieldbus™ H1, IEC 61158-2
• FDE (Fault Disconnection Electronic) = 0 mA
• Data transmission rate: supported baud rate = 31.25 kBit/s
• Signal coding = Manchester II
•Output data:
Available values via AI blocks: temperature (PV), temp sensor 1 + 2, terminal temperature
• LAS (link active scheduler), LM (link master) function is supported:
Thus, the head transmitter can assume the function of a link active scheduler (LAS) if the current
link master (LM) is no longer available. The device is supplied as a BASIC device. To use the device
as an LAS, this must be defined in the distributed control system and activated by downloading the
configuration to the device.
• In accordance with IEC 60079-27, FISCO/FNICO
Breakdown information Status message in accordance with FOUNDATION Fieldbus™ specification.
Linearization/transmission
Temperature linear, resistance linear, voltage linear
behavior
Mains voltage filter 50/60 Hz
Galvanic isolation U = 2 kV AC (sensor input to the output)
Switch-on delay 8 s
Data of the FOUNDATION Fieldbus interface
Basic Data
Device Type 11CE (hex)
Device Revision 02
Node address Default: 247
ITK Version 6.0.1
ITK-Certification Driver-No. IT085900
Link Master (LAS) capable yes
Link Master / Basic Device selectable
Number VCRs 44
Number of Link-Objects in VFD 50
yes; Default: Basic Device
Virtual communication references (VCRs)
Permanent entries 1
Fully configurable entries 43
Link Settings
Slot time 8
Min. Inter PDU delay 10
Max. response delay * slot time 24
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Blocks
Block description Block index
Resource Block
Transducer Block Sensor 1
Transducer Block Sensor 2
Transducer Block Display
Transducer Block Adv. Diag.
Function block AI1
Function block AI2
Function block AI3
Function block AI4
Function block AI5
Function block AI6
Function block PID
Function block ISEL
1) The values in brackets are valid if all the AI blocks (AI1-AI6) are instantiated.
Brief description of the blocks Resource Block
The Resource Block contains all the data that clearly identify and characterize the device. It is like an
electronic device nameplate. In addition to parameters that are needed to operate the device on the
fieldbus, the Resource Block also makes other information available such as the order code, device ID,
hardware version, firmware version, etc.
Transducer Block "Sensor 1" and "Sensor 2"
The Transducer Blocks of the head transmitter contain all the measurement-related and devicespecific parameters that are relevant for measuring the input variables.
Display Transducer
The parameters of the "Display" Transducer Block allow the configuration of the optional display.
Advanced Diagnostic
All the parameters for automatic monitoring and diagnosis are grouped together in this Transducer
Block.
Analog Input (AI)
In the AI function block, the process variables from the Transducer Blocks are prepared for subsequent
automation functions in the control system (e.g. scaling, limit value processing).
PID
This function block contains input channel processing, proportional integral-differential control (PID)
and analog output channel processing. The following can be implemented: basic controls, feedforward
control, cascade control and cascade control with limiting.
Input Selector (ISEL)
The block for selecting a signal (Input Selector Block - ISEL) allows the user to choose up to four inputs
and generates an output based on the configured action.
400
500
600
700
800
900
1000
1100
(1200)
(1300)
(1400)
1200 (1500)
1300 (1600)
1)
Execution time
(macro cycle ≤ 500 ms)
-
-
-
-
30 ms
30 ms
30 ms
30 ms (not instantiated)
30 ms (not instantiated)
30 ms (not instantiated)
25 ms
20 ms
iTEMP TMT85
Block class
Extended
Manufacturer-specific
Manufacturer-specific
Manufacturer-specific
Manufacturer-specific
Extended
Extended
Extended
Extended
Extended
Extended
Standard
Standard
Power supply
Supply voltage U = 9 to 32 V DC, polarity independent (max. voltage Ub = 35 V)
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iTEMP TMT85
-
+
+
1
-
2
7
6
5
4
3
1
2
7
6
5
4
3
Sensor input 2
Sensor input 1
Bus connection
and supply voltage
Display connection/
service interface
TC, mV
RTD, Ω4-, 3- and 2-wire:
RTD, Ω 3- and 2-wire:
TC, mV
white
red
red
white
white
red
red
(black)
(yellow)
(black)
Electrical connection
A0007285-EN
Terminal assignment of head transmitter.
Current consumption ≤ 11 mA
Terminals Choice of screw or spring terminals (see "Design, dimensions" diagram) for sensor and fieldbus wires:
Terminals version Wire version Conductor cross-section
2
Screw terminals (with latches at
the fieldbus terminals for easy
connection of a handheld terminal,
e.g. FieldXpert, FC475)
Spring terminals
Stripped length = min. 10 mm
(0.39 in)
Rigid or flexible ≤ 2.5 mm
Rigid or flexible 0.2 mm
Flexible with wire-end ferrules
without plastic ferrule
Flexible with wire-end ferrules
with plastic ferrule
0.25 mm
0.25 mm
(14 AWG)
2
to 1.5 mm2 (24...16 AWG)
2
to 1.5 mm2 (24...16 AWG)
2
to 0.75 mm2 (24...18 AWG)
No ferrules have to be used when connecting flexible wires to spring terminals.
Performance characteristics
Response time 1 s per channel
Reference operating conditions
• Calibration temperature: + 25 °C ± 5 K (77 °F ± 9 °F)
• Supply voltage: 24 V DC
• 4-wire circuit for resistance adjustment
Resolution Resolution A/D converter = 18 bit
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iTEMP TMT85
Maximum measured error
Typical values, according to DIN EN 60770, 25 °C ± 3 °C (77 °F ± 5,4 °F), supply voltage
. The data concerning the various measured errors correspond to a standard deviation
24 V
DC
of 2 σ (Gaussian normal distribution). These data include nonlinearity and repeatability.
Designation Measuring range Typical measured error (±)
Resistance thermometer
(RTD) according to standard
IEC 60751:2008 Pt100 (1)
IEC 60751:2008 Pt1000 (4) 0.08 °C (0.14 °F)
GOST 6651-94 Pt100 (9) 0.07 °C (0.13 °F)
Thermocouples (TC)
according to standard
IEC 60584-1 Typ K (36)
IEC 60584-1 Typ S (39) 0.97 °C (1.75 °F)
GOST R8.8585-2001 Typ L (43) 2.18 °C (3.92 °F)
1) Using fieldbus transmitted measured value
0 to +200 °C (32 to +392 °F)
0 to +800 °C (32 to +1472 °F)
Measured error for resistance thermometer (RTD) and resistance transmitters
Measured error (±) Non-repeatability (±)
1)
Standard Designation Measuring range
Maximum Relating to measured
IEC 60751:2008
IEC 60751:2008 Pt200 (2) ≤ 0.30 °C (0.54 °F) 0.11 °C (0.2 °F) + 0.018%
IEC 60751:2008 Pt500 (3) -200 to +510 °C
IEC 60751:2008
JIS C1604:1984 Pt100 (5) -200 to +510 °C
GOST 6651-94 Pt50 (8) -185 to +1100 °C
GOST 6651-94 Pt100 (9) -200 to +850 °C
DIN 43760 IPTS-68 Ni100 (6)
DIN 43760 IPTS-68 Ni120 (7)
OIML R84:2003 / GOST
6651-2009
OIML R84:2003 / GOST
6651-2009
OIML R84:2003 / GOST
6651-2009
OIML R84:2003 / GOST
6651-2009
OIML R84:2003 / GOST
6651-94
Pt100 (1)
-200 to +850 °C
(-328 to +1562 °F)
(-328 to +950 °F)
Pt1000 (4)
Cu50 (10)
Cu100 (11)
Ni100 (12)
Ni120 (13)
Cu50 (14) -50 to +200 °C
-200 to +250 °C
(-328 to +482 °F)
(-328 to +950 °F)
(-301 to +2012 °F)
(-328 to +1562 °F)
-60 to 250 °C
(-76 to 482 °F)
-60 to +250 °C
(-76 to +482 °F)
-60 to +180 °C
(-76 to +356 °F)
(-58 to +392 °F)
≤ 0.12 °C (0.21 °F) 0.06 °C (0.11 °F) +
≤ 0.16 °C (0.29 °F) 0.05 °C (0.09 °F) +
≤ 0.09 °C (0.16 °F)
≤ 0.20 °C (0.36 °F) 0.1 °C (0.18 °F) + 0.008%
≤ 0.11 °C (0.2 °F)
≤ 0.05 °C (0.09 °F)
≤ 0.11 °C (0.2 °F) 0.09 °C (0.16 °F) +
≤ 0.06 °C (0.11 °F)
≤ 0.05 °C (0.09 °F) ≤ 0.03 °C (0.05 °F)
≤ 0.11 °C (0.2 °F) 0.1 °C (0.18 °F) + 0.004%
Digital
value
0.006% x (MW - MBA)
x (MW - MBA)
0.015% x (MW - MBA)
0.03 °C (0.05 °F) +
0.013% x (MW - MBA)
0.05 °C (0.09 °F) +
0.006% x (MW - MBA)
x (MW - MBA)
0.05 °C (0.09 °F) +
0.006% x (MW - MBA)
0.006% x (MW - MBA)
0.05 °C (0.09 °F) +
0.003% x (MW - MBA)
x (MW - MBA)
Digital value
0.08 °C (0.14 °F)
0.31 °C (0.56 °F)
1)
≤ 0.05 °C (0.09 °F)
≤ 0.13 °C (0.23 °F)
≤ 0.08 °C (0.14 °F)
≤ 0.05 °C (0.09 °F)
≤ 0.04 °C (0.07 °F)
≤ 0.11 °C (0.2 °F)
≤ 0.05 °C (0.09 °F)
≤ 0.03 °C (0.05 °F)
≤ 0.05 °C (0.09 °F)
≤ 0.04 °C (0.07 °F)
≤ 0.07 °C (0.13 °F)
8 Endress+Hauser
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