iTemp TMT85

Summary

Product identification

• Product Name: iTEMP TMT85
• Product Type: Dual-input temperature transmitter
• Protocol: FOUNDATION Fieldbus™ H1
• Document: TI00134R/09/EN/08.22-00

Application

The iTEMP TMT85 is a temperature transmitter with two universal input channels and FOUNDATION Fieldbus™ protocol. It converts various input signals into digital output signals, offering reliability, long-term stability, high precision, and advanced diagnostic functions. It is suitable for critical processes and the highest levels of safety, reliability, and risk reduction.

Input

• Universal Input:
  • Resistance thermometers (RTD)
  • Thermocouples (TC)
  • Resistance transmitters (Ω)
  • Voltage transmitters (mV)
• Number of Channels: 2
• Input Signals: Temperature (temperature-linear transmission behavior), resistance, and voltage.
• Connection Combinations: Multiple combinations are possible between RTD/resistance transmitter (2-, 3-, or 4-wire) and Thermocouple/voltage transmitter inputs.

Measuring Range

• Resistance Thermometers (RTD):
  • IEC 60751:2008 Pt100: –200 to +850 °C (–328 to +1 562 °F)
  • IEC 60751:2008 Pt1000: –200 to +250 °C (–328 to +482 °F)
  • JIS C1604:1984 Pt100: –200 to +649 °C (–328 to +1 200 °F)
  • DIN 43760 Ni100: –60 to +250 °C (–76 to +482 °F)
  • OIML R84: 2003 Cu50: –200 to +200 °C (–328 to +392 °F)
• Resistance Transmitter (Ω):
  • 10 to 400 Ω
  • 10 to 2,000 Ω
• Thermocouples (TC) as per IEC 60584, Part 1:
  • Type K (NiCr-Ni): –270 to +1,372 °C (–454 to +2,501 °F)
  • Type S (PtRh10-Pt): –50 to +1,768 °C (–58 to +3,214 °F)
  • Type T (Cu-CuNi): –260 to +400 °C (–436 to +752 °F)
• Voltage Transmitter (mV):
  • –20 to 100 mV

Output

• Output Signal: FOUNDATION Fieldbus™ H1, IEC 61158-2
• Data Transmission Rate: 31.25 kBit/s
• Output Data: Temperature (PV), temperature sensor 1 + 2, terminal temperature via AI blocks.
• LAS/LM Function: Supported, device can act as a Link Active Scheduler.

FOUNDATION Fieldbus™ Basic Data

• Device Type: 10CE (hex)
• Device Revision: 02
• ITK Version: 6.0.1
• Link Master Capability (LAS): Yes

Power Supply

• Supply Voltage: 9 to 32 V DC (max. 35 V DC)

Electrical Connection

• Terminals: Choice of screw terminals or push-in terminals.
  • Screw terminals: Rigid or flexible cable, ≤ 2.5 mm² (14 AWG)
  • Push-in terminals: Rigid or flexible cable, 0.2 to 1.5 mm² (24 to 16 AWG); flexible with wire end ferrules, 0.25 to 1.5 mm² (24 to 16 AWG).

Performance Characteristics

• Response Time: 1 s per channel
• Resolution: A/D converter resolution = 18 bit
• Maximum Measured Error: See the official PDF for exact tabulated values.
• Long-term drift: See the official PDF for exact tabulated values.

Operating Influences

• Ambient Temperature and Supply Voltage: Influences on resistance thermometers, resistance transmitters, thermocouples, and voltage transmitters are detailed in the official PDF.
  • Example for Pt100 (IEC 60751:2008):
    • Ambient temperature influence: 0.002% * (MV -LRV) per 1 °C change, at least 0.005 °C (0.009 °F).
    • Supply voltage influence: 0.002% * (MV -LRV) per V change, at least 0.005 °C (0.009 °F).

Mounting and Installation

• Installation Options:
  • Terminal head form B (flat face) per DIN EN 50446.
  • Separated in field housing for wall or pipe mounting.
  • Clip on DIN rail per IEC 60715 (TH35).
• Orientation: No restrictions.

Environment

• Ambient Temperature Range: –40 to +85 °C (–40 to +185 °F) (for hazardous areas, see Ex documentation).
• Storage Temperature: –40 to +100 °C (–40 to +212 °F).
• Operating Altitude: Up to 4000 m (4374.5 yards) above sea level.
• Relative Humidity: Condensation permitted; max. 95% rel. humidity.
• Climate Class: C as per EN 60654-1.
• Degree of Protection:
  • Head transmitter (screw terminals): IP 00; (push-in terminals): IP 30.
  • In field housing TA30A, TA30D, TA30H: IP 66/67 (NEMA Type 4x).
• Shock and Vibration Resistance: Vibration resistance as per IEC 60068-2-6: 10 to 2,000 Hz at 5g.
• Electromagnetic Compatibility (EMC): CE conformity; Interference immunity as per IEC/EN 61326 series, industrial requirements; Interference emission as per IEC/EN 61326 series, Class B equipment.
• Overvoltage Category: Measuring category II per IEC 61010-1.
• Pollution Degree: Pollution degree 2 per IEC 61010-1.

Mechanical Construction

• Design: Available as a head transmitter or in field housings (TA30A, TA30D, TA30H).
• Weight:
  • Head transmitter: approx. 40 to 50 g (1.4 to 1.8 oz).
  • Field housing TA30A: 330 g (11.64 oz).
  • Field housing TA30A with display window: 420 g (14.81 oz).
  • Field housing TA30H (Aluminum): approx. 640 g (22.6 oz).
  • Field housing TA30H (Stainless steel): approx. 2,400 g (84.7 oz).
  • Field housing TA30H with display window (Aluminum): approx. 860 g (30.33 oz).
  • Field housing TA30H with display window (Stainless steel): approx. 2,900 g (102.3 oz).
  • Field housing TA30D: 390 g (13.75 oz).
• Materials: All materials used are RoHS-compliant. Housing: Polycarbonate (PC). See official PDF for detailed material specifications.

Operability

• Local Operation: Head transmitter has no display or operating elements, but an optional attachable measured value display (TID10) can be used.
• Remote Operation: Configuration via FOUNDATION Fieldbus™ communication using special configuration tools.

Certificates and Approvals

• CE Mark: Confirms compliance with EC directives.
• Ex Approval: Information available from Endress+Hauser Sales Center upon request.
• UL Approval: E225237
• CSA GP: General Purpose
• FOUNDATION Fieldbus™ Certification: Certified per FOUNDATION Fieldbus™ specification, H1, ITK revision 6.0.1.

Accessories

• Device-specific: TID10 display unit, field housings (TA30A, TA30D, TA30H), DIN rail mounting adapter, mounting sets, Fieldbus connectors, wall/pipe mounting brackets.
• Communication-specific: Commubox FXA291, Field Xpert SMT70.
• Service-specific: Applicator software, Configurator tool, DeviceCare SFE100, FieldCare SFE500, W@M lifecycle management.

Supplementary Documentation

• Operating Instructions
• Brief Operating Instructions
• Guideline FOUNDATION Fieldbus Function Blocks
• Supplementary ATEX documentation
• Operating Instructions for Display TID10

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Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

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