Description
Product Introduction – Bently Nevada 3500/25 Internal Barrier I/O Module
The 3500/25 I/O Module 135473-01 is built for explosion protection.
It works inside the 3500 Machinery Protection System.
It protects transducer circuits in hazardous areas.
Structured Configuration Tree
- 3500/25 – I/O Module Family
- Standard I/O
- Direct transducer connection
- Used in safe areas
- Internal Barrier I/O
- Built-in explosion protection
- No external barrier needed
- Designed for hazardous zones
- Earthing Module
- Dedicated grounding path
- Improves intrinsic safety
- Standard I/O
Main Advantages
- Integrated internal safety barriers
- No loss of rack performance
- Direct replacement for older I/O modules
- No extra cabinet space required
- Supports system upgrade without rewiring
- Compliant with global explosion standards
Mechanical Specifications
- Module size: 241.3 × 24.4 × 163.1 mm
- Earthing size: 241 × 24.4 × 103.1 mm
- Module weight: 0.46 kg
- Earthing weight: 0.201 kg
- Rack requirement: 1 full rear slot
Electrical Performance
- Channel voltage limit: 28 Vdc typical
- Short circuit current limit: 93 mA max
- Loop resistance: ≤300 Ω typical
- Input impedance: High impedance design
- Signal isolation: Intrinsic safety barrier
- Temperature accuracy: ±1 °C at 25 °C
- Operating range: -30 °C to +65 °C
- Storage range: -40 °C to +85 °C
- Ground leakage control: Low leakage design
Safety & Compliance
- Approved for hazardous area installations
- Meets North American standards
- Meets international explosion protection codes
- Designed for intrinsic safety circuits
Installation Notes
- Install in 3500 rack rear slot
- Connect proper earth module
- Confirm zone classification before use
- Replace existing I/O without system change
Typical Application
- Oil and gas platforms
- Refinery compressor trains
- Gas turbine monitoring
- Steam turbine protection
- Chemical plant rotating equipment
Commercial Terms
- 12 months warranty from delivery date
- Brand new and factory sealed
- Fast delivery by FedEx, UPS, DHL
- Secure industrial export packing
Professional FAQ
- Do I need external safety barriers?
- No. The module has built-in internal barriers.
- Can I upgrade from standard I/O to barrier I/O?
- Yes. Replace the I/O module only.
No rack change required. - How do I choose between internal and external barrier types?
- Choose internal type for compact cabinets.
Use external type if site rules require separation. - Does the module affect signal accuracy?
- No. It keeps stable measurement within ±1 °C at 25 °C.
- What should I confirm before purchase?
- Check rack model, hazardous zone rating, and monitor type compatibility.
Selection Support
- Confirm system series compatibility
- Verify hazardous area certification
- Match with correct monitor module
- Ensure proper grounding design
Purchase Consultation
- Contact: +86 158 8020 0923
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