RTD to modbus transmitter  TMT 2140

TRANCEL TML 2140 has been designed to provide a highly reliable isolated connection between (up to four) RTD and PLC through RS-485. Linearizing the measurement signal with extreme accuracy makes it ideal for the most exacting temperature measuring applications. Benefiting from lead resistance compensation and the highest interference resistance, problem-free application is guaranteed with long transfer distances in the harshest environments.


  • High Accuracy (±0.2oC)
  • Lead Resistance Compensation
  • Input Surge-voltage Protection
  • Sensors Wiring Burned-out Detection
  • RFI/EMI Screened
  • High Speed Serial Interface
  • Isolated Power and Serial Port
  • Transient Suppression on RS-485 Line
  • Compact Case with DIN-rail Mounting

Technical Specification

Supply21.6 – 26.4 VDC, < 1W
Isolated Voltage1.5 KV RMS, <1min
A/D Converter16-bit Sigma-Delta

External Resolution , MAX0.1o C
RTD TypePT100, 2,3-wire, (a = 0.00385)
Range-200 oC – +800 oC
Serial PortRS-485 2-wire, Isolated, Modbus (RTU)
Baud Rates9600-19200-38400-115200 bps– Dipswitch Configurable
Address Range1 … 32 – Dipswitch Configurable
Operation Temperature-20o C to +60o C
Case96 x 96 x 72 mm, IP20

Schematic Diagram

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