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

Temperature input

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

Surge Protection Type RTD input isolated safety barrier

PHD-11TZ-X1+  1 input 1 output
PHD-12TZ-X11+  1 input 2 outputs

Input : Two-wire or three-wire RTD signal

Output : 4-20mA


    The RTD input isolation safety barrier with surge protection function can convert the two wire or three wire thermistor (RTD) signals in hazardous areas into 4-20mA current signals and output them to the safety zone. It can be intelligently configured, and the actual range of the thermal resistance 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 thermistor, 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 RTD model Measurement range Minimum range Conversion accuracy
    1 G53   -50~150℃ 20℃ 0.2℃/0.1%
    2 Cu50   -50~150℃ 20℃ 0.2℃/0.1%
    4 Pt100   -200~850℃ 20℃ 0.2℃/0.1%
    6 Pt1000   -200~850℃ 20℃ 0.2℃/0.1%
    7 Ni1000   -60~250℃ 20℃ 0.2℃/0.1%



    Input in harzadous area
    Input signal Two wire or three wire thermistor 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 Corresponding measurement range of thermal resistance
    Measurement range Users make their own configuration when ordering, and indicate it at the tail number or otherwise.
    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)
    LED indicator  Green: Power indicator
    Low range alarm yellow light on, high range alarm red 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 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 Two wire or three wire thermistors
    G53, Cu50, Pt100, Pt1000, Ni1000
    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 4-6、5-6 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



    Schematic Drawings



    1. PHD-11TZ - * 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"

    3. When inputting a three wire RTD, it is necessary to ensure that the three wires are of equal length as much as possible

    4. When inputting a two-wire RTD, safety barrier terminals 4 and 2 must be short circuited