iTemp TMT36

Summary

Product identification

• Product name: iTEMP TMT36
• Product type: Temperature transmitter
• Form factor: Form B (flat face) head transmitter with IO-Link interface

Application

The temperature transmitter is designed for reliability, long-term stability, high precision, and diagnostic functions, ensuring maximum safety and availability. It can be installed in a terminal head form B (flat face) or on a DIN rail using a clip.

Key Features

• Diagnostics information according to NAMUR NE107
• Optional fast, tool-free wiring with push-in terminal technology
• High accuracy and flexibility using the Callendar-van Dusen equation
• Easy and cost-effective solution via digital communication using IO-Link

Input

• Measured variable: Temperature
• Sensor type: Resistance thermometer (RTD)

Measuring Range

• Pt100 (α=0.00385): –200 to +850 °C (–328 to +1 562 °F)
• Pt1000 (α=0.00385): –200 to +500 °C (–328 to +932 °F)
• Connection type: 2-wire, 3-wire, or 4-wire
• Sensor current: ≤ 0.3 mA
• Cable resistance compensation (2-wire): 0 to 30 Ω
• Sensor wire resistance (3-wire and 4-wire): Up to 50 Ω per wire

Output

• Signal: C/Q (IO-Link or switch output)
• Switch output:
  • 1 x PNP, NPN or push-pull switch output, configurable
  • Switching capacity: ≤ 150 mA
  • Voltage drop (PNP, NPN): ≤ 2 V
  • Overload protection: Automatic detection, switches to safe state with diagnostic message "Overload at the switch output".
  • Switch functions: Hysteresis or window function, NC contact or NO contact.
• Failure information: Configurable fault state for switch output (On, off, high-impedance).
• Damping: Configurable sensor input damping from 0 to 120 s (factory setting 0 s).

Protocol-specific data (IO-Link)

• IO-Link specification: Version 1.1.3
• IO-Link transmission rate: COM2; 38.4 kBaud
• Minimum cycle time: 10 ms
• Process data width: 6 bytes
• IO-Link data storage: Yes
• Block configuration: Yes

Switch-on delay

≤ 5 s, until the first valid measured value signal is present.

Power supply

• Supply voltage: 18 to 30 VDC, protected against reverse polarity
• Current consumption: ≤ 11 mA

Electrical connection

• Terminals: Choice of screw-type or push-in terminals.
  • Screw terminals: Rigid or flexible cable, ≤ 1.5 mm² (16 AWG)
  • Push-in terminals: Rigid or flexible cable, 0.2 to 1.5 mm² (24 to 16 AWG); Flexible with ferrules (with or without plastic ferrule), 0.25 to 1.5 mm² (24 to 16 AWG).
  • Note: Ferrules required for push-in terminals with flexible cables ≤ 0.3 mm².

Performance characteristics

• Response time (RTD): ≤ 0.5 s
• Reference conditions:
  • Calibration temperature: +25 °C ±3 K
  • Supply voltage: 24 V DC
  • Circuit: 4-wire for resistance adjustment
• Maximum measurement error (±): 0.15 K in the entire measuring range under reference conditions. This includes non-linearities and repeatability.
• Operating influences:
  • Ambient temperature: ±0.04 °C/°C (Pt100) or ±0.02 °C/°C (Pt1000)
  • Supply voltage: ±0.02 °C/V (Pt100) or ±0.01 °C/V (Pt1000)
• Long-term drift (±):
  • After 1 year: 0.05 K
  • After 3 years: 0.06 K
  • After 5 years: 0.07 K

Sensor adjustment

• Sensor-transmitter matching: Utilizes the Callendar-van Dusen equation for improved accuracy.
• Methods: 1-point adjustment (offset) to shift sensor values.

Ambient conditions

• Ambient temperature: –40 to +85 °C (–40 to +185 °F)
• Storage temperature: –50 to +100 °C (–58 to +212 °F)
• Altitude: Up to 4,000 m (13,123 ft) above sea level.
• Humidity: Maximum relative humidity 95 % (condensation permitted).
• Climate class: C1 as per IEC 60654-1.

Mechanical construction

• Degree of protection: IP 20 for the head transmitter; depends on the installed terminal head.
• Shock and vibration resistance:
  • Vibration: 5 to 25 Hz (1.6 mm), 25 to 100 Hz (4 g)
  • Shock: 30 g, 18 ms
• Dimensions: See diagrams in the datasheet.
• Weight: 40 to 50 g (1.4 to 1.8 oz)
• Materials: Housing (polycarbonate), terminals (nickel-plated brass/tin-plated brass, brass springs), potting compound (SIL gel). All materials are RoHS-compliant.

Human interface

• Operation concept: Device parameters are configured via IO-Link using configuration software. No onsite operating elements.
• Onsite display: No built-in display. Optional attachable display (TID10) available.

System integration

• IO-Link: Integrates field devices into digital communication systems via IO Device Description (IODD) files. IODDs are available for download from endress.com or ioddfinder.io-link.com.

Certificates and approvals

• Current certificates and approvals are available on the Endress+Hauser website.

MTTF

• Mean Time To Failure: 371 years

Accessories

• Various device-specific and communication-specific accessories are available, including DIN rail mounting adapters, configuration tools (FieldPort SFP20, Field Xpert SMT50), and IO-Link masters.

Supplementary documentation

• Technical Information (TI)
• Brief Operating Instructions (KA)
• Operating Instructions (BA)
• Description of Device Parameters (GP)
• Safety Instructions (XA)
• Supplementary device-dependent documentation (SD/FY)

---

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

Official datasheet (PDF)

Lenntech datasheet mirror