HD7500 Series Isolated Surge-Protective Safety Barrier
Combines an isolated safety barrier and signal surge protection; nominal discharge current 10 kA; three-way isolation between input/output/power supply; suitable for Zone 2 locations.
- Original Factory Genuine, Tenfold Compensation for Counterfeits
- Full Machine Warranty, Lifetime Maintenance
- In Stock, Shipped on the Same Day
The HD7500 series isolated surge-protective safety barrier combines two key features: signal surge protection and intrinsically safe explosion protection. It consists of a surge protection module (S-24-D3 Pro, inserted into the signal module in modular form) and an isolated safety barrier function module, and is used plugged into a backplane (HD75-16IO / HD75-16TY) that can accommodate up to 16 modules. The product is only permitted for use in Zone 2 hazardous areas.
The signal surge protection rating reaches a nominal discharge current of 10kA (8/20μs), with a voltage protection level of less than 600V (L-G); the signal module provides the isolated safety barrier function, with three-terminal isolation between the intrinsically safe side, the non-intrinsically safe side and the power supply side, effectively shielding interference. Through optical, electrical and magnetic isolation technologies, the product isolates the supply power, input signals and output signals from one another, achieving isolated transmission of digital/analogue signals between field intrinsically safe devices and control room equipment.
| Parameter Name | Technical Specifications |
|---|---|
| Explosion protection and composition | |
| Application locations | Permitted for use in Zone 2 hazardous areas; can be connected to Zone 0 intrinsically safe devices |
| Structural composition | Surge protection module (S-24-D3 Pro) + isolated safety barrier function module (signal module) |
| Mounting base | HD75-16IO / HD75-16TY, up to 16 modules |
| Surge protection specifications | |
| Nominal discharge current | 10kA (8/20μs) |
| Voltage protection level (L-G) | <600V |
| Voltage protection level (L-L) | <60V |
| Power supply and isolation | |
| Operating power supply | (20~30)VDC |
| Maximum permissible voltage Um | 30VDC |
| Isolation method | Three-port isolation of input/output/power supply, forming a fully floating system |
| Accuracy | |
| Analogue conversion accuracy | 0.1% F.S |
| Temperature drift | 1μA/℃ |
| Environment and structure | |
| Continuous operating temperature | (-20~60)℃ |
| Storage temperature | (-40~80)℃ |
| Relative Humidity | (5~95)% |
| Weight | Approx. 125g |
| Dimensions | 135mm×120mm×12.5mm |
- Two-in-one signal surge protection + intrinsically safe explosion protection, reducing discrete devices in the cabinet
- Embedded hidden design of surge protection module, supporting online hot-swap, signal uninterrupted during replacement
- Nominal discharge current 10kA (8/20μs), voltage protection level <600V (L-G)/<60V (L-L)
- Three-port isolation of input/output/power supply, forming a fully floating system, suppressing power-frequency and common-mode interference
- Each module supports intelligent online fault diagnosis, with alarm indication and upload functions
- Dual redundant circuit design, low power consumption and good heat dissipation under dense installation
- Analogue 0.1% F.S conversion accuracy, 1μA/℃ low temperature drift
- Backplane integrated installation, including redundant power input and monitoring alarm, saving cabinet space
Surge protection for intrinsically safe circuits in petrochemical plants
Installed centrally via backplane in Zone 2 cabinets, providing both surge protection and safety barrier isolation for Zone 0 intrinsically safe instrument circuits.
Signal protection in lightning-prone areas
Surge protection modules are added to the field 4~20mA loop, confining faults to one side during a lightning strike and protecting the control-room-side cards.
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Send us the working condition parameters (signal type, medium, range, pressure, temperature, connection method), and our engineers will provide a selection scheme and quotation within 1 working day.
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