• TC-AT Thermocouple Input Isolator (Analog) TC-AT Thermocouple Input Isolator (Analog)

TC-AT Thermocouple Input Isolator (Analog)

Item No: DYT12168203

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TC-AT Thermocouple Input Isolator (Analog)

· Multiple channel formats (optional). Thermocouple signal input. The output signal is 4~20mA or 0~20mA. Terminal supply or DIN rail power supply is available.
· TC-AT Thermocouple Input Isolator is a temperature transmitter that converts field thermocouple millivolts into a standard current signal. The product is composed of analog circuits, with no resolution error, no sampling period error, etc. It also has important characteristics such as high reliability and no crash risk.
· Output signal 4~20mA or 0~20mA
· This product requires a separate DC power supply. Voltage-type magnetic isolation between power supply-input-output.


Model / selection table:


   Model and code


    Basic model


     Thermocouple input signal isolator

    Channel form


     1 in 1 out


     1 in 2 out


     1 in 3 out


     1 in 4 out      (only products with rail supply)


     2 in 2 out


     2 in 3 out


     2 in 4 out     (only products with rail power supply)

   Input signal




     Other special thermocouples

   Output signal






     Special order

   Power supply voltage


     Power supply (terminal) 2032VDC


     Power supply (rail) 2032VDC (special power supply DIN rail required)

   Service Code


     Product Service Code

   Selection example 
   Example 1: TC-AT11-TA-V1-QC9A ...... (1 input and 1 output, thermocouple input isolator, output signal 4~20mA, terminal power supply 20~32VDC) 
   Example 2: TC-AT12-TA-V2-QC9A ...... (1 input and 2 output, thermocouple input isolator, output signal 4~20mA, rail supply 20~32VDC) 
   Example 3: TC-AT11-TZ-V1-QC9A ...... (1 input and 1 output, thermocouple input isolator, output signal 1~5V, terminal power supply 20~32VDC) 
   1. Please indicate the signal type and range when ordering. 
   2. If you select a rail-powered product, please order a dedicated DIN rail. 
   Optional accessories 
   Dedicated power supply DIN rail: PSDR-3000 series 


Technical data:








     Housing Material / Color

PC (Polycarbonate) + PPT Material / Black Gray 

Protection level  



Environmental conditions:

    Ambient temperature


   Ambient temperature (storage or operation)


    Ambient humidity (operation)

    5~95RH (no condensation)



   Input signal

    KESB and other thermocouples

   Temperature measurement range

    Depends on sensor type



   Current output


   Maximum output current


   Current Output Load

    Adaptive Load 0~300Ω (factory default)

   Output ripple

    <10mV p-p

   Output status when input overload or disconnection

    Output current <3.5mA (lower limit) or >21mA (upper limit)


Power supply:

Rated supply voltage


Power supply voltage range


Maximum current consumption

<20mA (1 in 1 out); <35mA (1 in 2 out); <50mA (1 in 3 out); <65mA (1 in 4 out);

<45mA (2 in 2 out); <60mA (2 in 3 out); <70mA (2 in 4 out)  


General parameters:

   Standard accuracy

    Typical values±0.1%FS

   Zero migration range


   Range migration range


   Output resolution

    3.8~100mV range, 1μA

   Load change effect


   Thermocouple input cold junction compensation error

    ±0.5~1°C (compensation range -15~+75°C)

   Temperature drift

    ·-10~35mV range: 0.0005% or 0.6μV (whichever is larger) 
    ·-10~75mV range: 0.0005% or 1.2μV (whichever is larger)

   Power-on or storage time drift

    ±2μA (180 days)

   Response time


   Power-on stabilization time


   Maximum withstand voltage

    Input-output-power supply: 2500V AC RMS / 1 minute

   Protection parameters

    · Power-on shock protection, power-on slow start >20ms
    · Reverse power supply protection, reverse voltage -30V
    · Output protection, output clamp current 22mA (typical)
    · Port misconnection and surge protection:
       A. The power-input-output between the two ports of the self-loop can withstand the external loop voltage <±24V.
       B. Input-output-power supply can withstand 2500V RMS/1 minute without damage.
       C. The short circuit or open circuit formed by the misconnection of the terminal is not damaged.

   Electromagnetic compatibility (EMC)

    In accordance with IEC 61326-1 (GB/T 18268), IEC 61326-3-1

   LED backlight indication

    Power up, the product model on the panel is clearly visible through the LED backlight perspective.

   Field device suitable for connection

    Thermocouple temperature sensor

   Mounting method

    Horizontal or vertical mounting, can be mounted on standard 35mm DIN rail (or dedicated busbar backplane powered DIN rail)


Wiring parameters:

   Rigid conductor cross section (min/max)


   Flexible wire cross section (min/max)


   Minimum wire cross section (AWG)


   Maximum wire cross section (AWG)


   Stripping length


   Connection type

    M3 screw fastening connection

   Crew torque

    up to 0.6Nm



    CE certification

    Meet CE standards


Product diagram / terminal wiring diagram:



Product Image Details

TC-AT Thermocouple Input Isolator (Analog) 1

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