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PHD-11TT-*1+  /PHD-12TT-*11

Temperature input

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PHD-11TT-*1+ /PHD-12TT-*11

TC input isolated safety barrier

PHD-11TT-*1+  1 input 1 output
PHD-12TT-*11  1 input 2 outputs

Input: TC signal 

Output: 4-20mA


    Thermocouple input isolation safety barrier with surge protection function can isolate and convert thermocouple (TC) signals in hazardous areas into 4-20mA current signals, and output them to the safety zone. This safety barrier has built-in cold end compensation and can be intelligently configured. The actual range of the thermocouple can be set through computer software. It has the functions of wire breakage alarm and out of range alarm.

    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)
    Input disconnection The default "low alarm" can be modified to "high alarm" through configuration software
    Signal range The measuring range of the corresponding thermocouple is -10~100mV.
    Measurement range Users make their own configuration when ordering, and indicate it at the tail number or otherwise.
    Built-in cold compensation ±1°C(Compensation range -20°C~ +60°C)
    Safety side output:
    Output signal 4~20mA
    Output load capacity 0~500Ω(customizable)
    Optional voltage output type, load resistance RL ≥ 330kΩ
    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)
    Supply voltage 20-35VDC
    Power consumption 24VDC power supply, 20mA output
    LED indicator  Green: Power indicator
    Low range alarm L1 light on, high range alarm L2 light on
    Output accuracy Please refer to the "Input Signal Type and Range Table" for details
    Response time Reaching 90% of the final value within 500ms
    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)
    Shanghai lightning protection products testing center


    PHD-11TT-x1+ .jpg


    1. PHD-11TT - * 1 +does not include output part 2

    2. 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"

    Schematic diagram

    PHD-11TT-x1+ (1).jpg