- Isolated Safety Barriers
- Signal Isolators
- Surge Protective Devices
- Safety Relays
- Isolated Intelligent I/O Modules
- Intelligent Gateways
- Industrial Data Optical Transceivers
- Online Dew Point Analyzers
- Data Acquisition Modules
- HART data converter
- Terminal Board
PHD-22TD-2121
Overview
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.
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Supply voltage |
20~35V DC, Power consumption: ≤130mA(24V power supply, 20mA output)
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Transmitter distribution voltage |
The open circuit voltage is ≤28V, and the output voltage is ≥15.5V when the circuit is 20mA
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Input signal |
two-wire or three-wire transmitter or current source signal (HART) |
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Output signal |
4~20mA (HART) |
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Allowable output load capacity |
0~500Ω(customizable) |
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Output accuracy |
0.1%F.S（Typical values：0.05%F.S） |
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Temperature drift |
0.005%F.S/℃ |
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Number of inputs and outputs channels |
2 input 2 output |
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Applicable field equipment |
2-wire, 3-wire transmitter and current source signal, this product is suitable for ABB, Fisher, Rosemount, Honeywell, as well as 3351, EJA, SIEMENS and other products with imported technology. |
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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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Insulation strength |
Between intrinsically safe side and non-intrinsically safe side (≥3000VAC/min); between power supply and non-intrinsically safe side (≥1500VAC/min) |
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Insulation resistance |
≥100MΩ (between input/output/power supply) |
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Dimensions |
Thickness 17.5mm* width 108mm* height 118mm |
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Electromagnetic compatibility |
According to IEC 61326-1(GB/T 18268), IEC 61326-3-1 |
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Explosion-proof mark |
[Ex ia Ga] IIC [Ex ia Da] ⅢC |
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Functional safety certification |
SIL3 according to IEC 61508 standards |
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Certification Body |
CQST(China National Quality Supervision and Test Centre for Explosion Protected Electrical Products) |
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Terminals 2-3、2-1 |
Um：250V AC/DC Uo=28V DC Io=93mA |
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Terminals 1-3、4-6 |
Um：250V AC/DC Uo=7.2V DC Io=--- |
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Installation site Requirements |
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
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MTBF |
≤100000h |
