Overview
The thermistor input isolation safety barrier can convert the Pt100 signals of two wire and three wire thermistors (RTDs) in hazardous areas into a 1:1 signal of the thermistor and transmit it 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.
Specifications
| Input in harzadous area | |
| Input signal | Two wire or three wire Pt100 signal |
| Measurement range | -200℃-850℃ |
| Safety side output: | |
| Output signal | RTD Pt100 signal |
| Load capacity | Load capacity 0-500 Ω (customizable) |
| Supply voltage | 20-35VDC |
| Power consumption | ≤55mA (when 24VDC power supply) |
| LED indicator | Green: Power indicator Short circuit alarm: ALM red light stays on for a long time Open circuit alarm: ALM red light flashing |
| Output accuracy | 0.1%F.S |
| Temperature drift | 0.1%F.S/10℃ |
| 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 RTD Pt100 |
| 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) |
Dimension
Schematic diagram
Note:
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"
2. When inputting a three wire RTD, it is necessary to ensure that the three wires are of equal length as much as possible
3. When inputting a two-wire RTD, safety barrier terminals 4 and 2 must be short circuited
