Overview
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% |
Specification
| 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 ≤40mA(PHD-11TT-*1+) ≤40mA(PHD-12TT-*11+) |
| 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 |
Dimension
Note:
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
