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TC input isolated safety barrier 

1 input 1 output

Input :TC signal

Output : 1:1 millivolt signal


    The thermocouple input isolation safety barrier with surge protection function can transmit the millivolt signal from thermocouple (TC) in the dangerous area to the safe area in 1: 1.

    This product requires independent power supply, with isolated power supply, input, and output terminals.

    "*" represents the input type of the thermocouple, and the specific model is represented by a code (see "Input Signal Type and Range Table" for details).

    Input signal types and measurement range
    Code TC model Measurement range Minimum range Conversion accuracy
    1 K -200~1370℃ 50℃ 0.5℃/0.1%
    2 S -50~1760℃ 500℃ 1.5℃/0.1%
    3 E -140~1000℃ 50℃ 0.5℃/0.1%
    4 J -160~1200℃ 50℃ 0.5℃/0.1%
    5 B 250~1800℃ 500℃ 1.5℃/0.1%
    6 T -200~400℃ 50℃ 0.5℃/0.1%
    7 R -50~1760℃ 500℃ 1.5℃/0.1%
    8 N -200~1300℃ 50℃ 0.5℃/0.1%


    Input in harzadous area
    Input signal K, S, E, J, B, T, R, N thermocouple signals (see "Input Signal Type and Range Table" for details)
    Signal range The measuring range of the corresponding thermocouple is -5~60mV.
    Safety side output:
    Output signal Thermocouple 1: 1
    Surge protection features:
    Nominal discharge current ln(8/20μs) 5kA
    Voltage protection level Up(8/20μs): 60V(line to line)
    Voltage protection level Up(8/20μs): 600V(line to ground)
    According to standards GB/T18802.21-2016(equivalent to 1EC61643-21:2012)
    LED indicator  Green: Power indicator
    Output accuracy Please refer to the "Input Signal Type and Range Table" for details
    Response time Reaching 90% of the final value within 300ms
    Temperature drift 0.005%F.S/℃
    Temperature parameters Working temperature: -20℃~+60℃, storage temperature:-40℃~+80℃
    Relative humidity 10%~95% RH no condensation
    Dielectric strength Between intrinsically safe side and non-intrinsically safe side (≥ 3000VAC/min);
    between power supply and non-intrinsically safe terminal (≥ 1500VAC/min)
    Insulation resistance ≥100MΩ (between input/output/power supply)
    Electromagnetic compatibility According to IEC 61326-1(GB/T 18268), IEC 61326-3-1
    MTBF 100000h
    Wire requirements Horizontal cutting surface ≥ 0.5mm2; Insulation strength ≥ 500V
    Applicable field equipments K. S, E, J, B, T, R, N TC sensors
    Installation place Installed in a safe zone, it can be connected to intrinsic safety instruments in hazardous areas up to Zone 0, IIC, Zone 20, and IIIC
    Intrinsically safe certification
    Explosion proof mark [Ex ia Ga]lIC [Ex ia Da]lllC
    Explosion-proof standard GB/T3836.1-2021  GB/T3836.4-2021
    Terminals 3-4 Um:250V AC/DC Uo=8.4V DC lo=31mA
    Po=65.1mW Co=4.8μF Lo=20mH
    Certification body CQST(China National Quality Supervision and Test Centre for Explosion Protected Electrical Products)




    Schematic diagram



    1. The power rail function is an optional function, and users need to specify the power supply method when placing an order

    The selection of power rail connectors can refer to page 89 of the "Annex"