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The analog input isolated safety barrier provides isolated power supply for two-and three wire transmitters in hazardous areas. The 4~20mA signal generated by the transmitter or current source is transmitted from the hazardous area to the safe area output, thereby driving the load in the safe area. For two-or three wire transmitters or current source signals, this safety barrier supports bidirectional communication of the Hart digital signal superimposed on the 4~20mA signal and has a wire breakage alarm function. This product requires independent power supply, with isolated power supply, input, and output terminals.
■ The isolated barrier transmits 4-20mA signals generated by transmitters in hazardous areas, or DC 4-20mA signals, to the safe area.
■ The barrier provides power distribution to the field transmitter. It supports HART digital signals and features line-fault (breakage) alarm functionality.
■ An external power supply of 20-35V DC is required.
■ Supports power supply via DIN-rail bus connectors
Product Dimension
Wiring Diagram
Technical Parameters:
| Item | Parameters | ||||||||
| Input Signal | Two or three-wire transmitteror current source(HART digital signal) | ||||||||
| Transmitter distribution voltage | The open circuit voltage is ≤28V, and the output voltage is ≥15.5V when the circuit is 20mA | ||||||||
| Output in Safety Area | |||||||||
| Output Signal | Active 4-20mA(HART digital signal) Passive 4~20mA(HART digital signal) optional | ||||||||
| Output Load | When outputting 20mA, 0-500Ω(customizable) Optional voltage output type, load resistance RL≥ 330kΩ | ||||||||
| Basic Parameters | |||||||||
| Supply voltage | 18-35V DC | ||||||||
| Power consumption | ≤65mA(When 24V power supply, 20mA output) | ||||||||
| LED indicator | Green-Power indicator | ||||||||
| Output accuracy | 0.1%F.S (Typical value:0.05% F.S) | ||||||||
| Response time | 2ms to reach 90% of the final value | ||||||||
| Temperature drift | 0.005%F.S/℃ | ||||||||
| Temperature parameters | Working temperature:-20℃~+60℃ Storage temperature:-40℃~+80'C | ||||||||
| Relative humidity | 10%-95% RH no condensation | ||||||||
| Insulation strength | Between intrinsically safe side and non-intrinsically safe side (≥3000V AC/min) between power supply and non-intrinsically safe side (≥1500V AC/min) | ||||||||
| Insulation resistance | ≥100MΩ (Between input/output/power supply) | ||||||||
| EMC | According to lEC 61326-1(GB/T 18268), IEC 61326-3-1 | ||||||||
| Wire requirements | Cross-seclion ≥0.5mm2 Insulation strength ≥500V | ||||||||
| Applicable field equipments | Two, three-wire (HART) transmitter or current source (HART) signal | ||||||||
| Installation place | Installed in a safe zone, it can be connected tointrinsic safety instruments in hazardous areas up to Zone 0, llC, Zone 20, and lllC | ||||||||
| Safety Certification | |||||||||
| Explosion-proof mark | [Exia Ga] IIC, [Exia Da]lllC | ||||||||
| Explosion-proof standard | GB/T 3836.1-2021 GB/T 3836.4-2021 | ||||||||
| Terminals 3-2, 3-4 | Um:250VAC/DC Uo=28VDC Io=93mA Po=0.65W Co=0.083uF Lo=4.2mH | ||||||||
| Terminals 1-2 | Um:250VAC/DC Uo=7.2VDC Io=-- Po=-- Co=12uF Lo=-- | ||||||||