Overview
Isolated safety barrier: PHD-12TZ-*11, RTD signal input, single input and dual output.
The isolated safety barrier can convert the RTD input signal in hazardous area to 4-20mA signal output and transmit it to the safe area. The circuit is equipped with single RTD signal input and DC dual output.
The output 4-20mA signal, can be intelligently configured. The actual range of RTD can be set by computer.
PHD-12TZ-*11, "*" indicates the input type of RTD, please use the code to indicate.
This product needs an external 20~35VDC power supply.
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% |
Example: Isolated safety barrier Pt100 input, temperature range 0~400℃, with two outputs 4~20mA, power supply 20~35VDC, the model is PHD-12TZ-411 (0~400℃), the measurement range can be set to the specified range of 0~400℃ by computer
* Bus terminal power supply, please see appendix for details.
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Specifications |
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Supply voltage |
20~35VDC, power consumption<1.8W(when power supply 24VDC, output 20mA) |
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Input signal |
Two-wire or three-wire RTD |
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Output signal |
4~20mA |
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Signal and measurement range |
Signal range: corresponding to the measurement range of RTD |
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Measurement range: When make an order, the user shall make the configuration by himself, which shall be indicated in the tail number or extra explained. |
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Allowable output load capacity |
0~500Ω(customizable) |
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Alarm indication |
L1 light is on at low-measurement range alarm; L2 light is on at high-measurement range alarm |
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Channel number of input and output |
1 input 2 outputs |
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Applicable field devices |
2-wire or 3-wire RTD(G53, Cu50, Pt100, Pt1000, Ni1000) |
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Output accuracy |
0.1%F.S (Typical value: 0.05%F.S) |
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Temperature drift |
0.005%F.S/℃ |
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Temperature parameters |
Working temperature: -20℃~+60℃, storage temperature:-40℃~+80℃ |
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Relative humidity |
10%~95% RH no condensation |
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Dielectric strength |
Between intrinsically safe side and non-intrinsically safe side (≥ 3000VAC/min); between power supply and non-intrinsically safe terminal (≥ 1500VAC/min) |
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Insulation resistance |
≥100MΩ (between input/output/power supply) |
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External dimensions |
Thickness 12.5mm x width 108mm x high 118mm |
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Electromagnetic compatibility |
According to IEC 61326-1(GB/T 18268), IEC 61326-3-1 |
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Functional safety certification |
SIL3 according to IEC 61508 EN 61511 standards |
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Explosion-proof mark |
[Exia Ga]IIC |
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Certification Body |
CQST(China National Quality Supervision and Test Centre for Explosion Protected Electrical Products) |
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Certified parameters (between terminals 2-3-4) |
Um=250V Uo=8.4V Io=31mA Co=4.8μF Lo=20mH Po=65mW |
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Installation site requirements |
It can be connected with instruments in 0 zone with ⅡA, ⅡB, ⅡC dangerous gas |
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MTBF |
≤100000h |
Wiring diagram
Terminal assignments and dimensions
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Terminal |
Terminal assignments |
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9 |
Power supply + |
20～35VDC |
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10 |
Power supply - |
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2-wire |
3-wire |
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2 |
with 4 short connected |
Input- |
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3 |
Input+ |
Input+ |
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4 |
Input- |
Input- |
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5 |
Output 1+ |
4～20mA |
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6 |
Output 1- |
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7 |
Output 2+ |
4～20mA |
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8 |
Output 2- |
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