Data Acquisition


  • 8-channel Thermistor Input
  • User-defined Thermistor Types
  • Dual Watchdog


The tM-TH8 is an 8-channel isolated thermistor input module that can be used for measuring temperatures via a thermistor. Many types of thermistors are supported and user-defined types can be added by specifying the Steinhart coefficients, if necessary. The added 2500 VDC intra-module isolation and 120 VDC overvoltage protection for the thermistor on the tM-TH8 ensure that the module will operate with higher reliability.


• Industrial Automation
• Industrial Machinery
• Building Automation
• Food and Beverage Systems
• Semiconductor Fabrication
• Control Systems


 CPU Module
 Watchdog Timer Module, Communication (Programmable)


 Intra-module Isolation 2500 VDC


 EMS Protection
 EFT (IEC 61000-4-4) ±4 kV for Power
 ESD (IEC 61000-4-2) ±4 kV Contact for Each Terminal
±8 kV Air for Random Point


 LED Indicators
 Status 1 x Power and Communication


 Analog Input
 Channels 8
 Type Thermistor
 Sensor Type Precon ST-A3, Fenwell U, YSI L100, YSI L300, YSI L1000, YSI B2252, YSI B3000, YSI B5000, SI B6000, YSI B10000, YSI H10000, YSI H30000, User-defined
 Resolution 16-bit
 Accuracy ±1%
 Sampling Rate 8 Hz total
 Overvoltage Protection 120 VDC
 Individual Channel Configuration Yes
 Open Wire Detection Yes


 COM Ports
 Ports 1 x RS-485
 Baud Rate 1200 ~ 115200 bps
 Data Format (N, 8, 1), (N, 8, 2), (O, 8, 1), (E, 8, 1)
 Protocol DCON, Modbus RTU, Modbus ASCII


 Reverse Polarity Protection Yes
 Input Range 1 W Max.
 Consumption 10 ~ 30 VDC


 Dimensions (mm) 52 x 98 x 27 (W x L x H)
 Installation DIN-Rail Mounting


 Operating Temperature -25 ~ +75 °C
 Storage Temperature -30 ~ +75 °C
 Humidity 10 ~ 95% RH, Non-condensing



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