BENTLY NEVADA 125720-02 Output Module – 3500 Series Rack System
When a critical output module fails in a rotating machinery protection system, the consequences extend far beyond a simple alarm silence. Turbines lose their relay-driven trip signals, compressors run unprotected, and plant operators are left blind to the vibration and process data that prevent catastrophic mechanical failure. In high-stakes environments — oil & gas, power generation, petrochemical — every second without a functioning output interface is a second of unacceptable risk. The BENTLY NEVADA 125720-02 Output Module is the precision-engineered solution that restores that critical link between the 3500 rack and the plant’s safety and control infrastructure.
The 125720-02 occupies a well-defined role within the Bently Nevada 3500 Series machinery protection ecosystem — one of the most widely deployed condition monitoring platforms in global heavy industry. Designed to interface relay outputs, OK relay signals, and system-level communications from the 3500 rack to external DCS, PLC, and ESD systems, this module is a cornerstone of any complete 3500 rack build. Its adoption spans upstream and downstream oil & gas, LNG terminals, nuclear and thermal power plants, and large-scale rotating equipment installations across six continents.
Technical Specifications
- Part Number: 125720-02
- Manufacturer: Bently Nevada (Baker Hughes)
- Series: 3500 Machinery Protection System
- Module Type: Output Module
- Form Factor: 3500 Rack-Mount Card
- Weight: 480 g (approx.)
- Compatibility: 3500 Series Rack (standard and TMR configurations)
- Output Functions: Relay outputs, OK relay, system communications interface
- Operating Environment: Industrial — suitable for control room and field enclosure installation
- Note: All specifications are sourced from publicly available Bently Nevada documentation. Konmask.com does not fabricate or alter OEM specifications.
Key Features & Benefits
- Direct 3500 Rack Integration: Plug-and-play compatibility with the standard 3500 rack backplane — no rewiring or adapter required.
- Relay Output Interface: Provides the critical relay-driven trip and alarm signals that connect the 3500 system to plant safety logic.
- OK Relay Functionality: Continuously monitors module health and signals system integrity status to the host DCS or ESD.
- System Communication Support: Enables rack-level communication outputs for integration with supervisory control and data acquisition (SCADA) layers.
- Robust Industrial Design: Built to Bently Nevada’s stringent quality standards for continuous operation in demanding industrial environments.
- Drop-in Replacement: Maintains backward compatibility with existing 3500 rack installations, minimizing downtime during replacement.
Industry & Equipment Applications
- Oil & Gas: Upstream compressor trains, downstream refinery turbines, LNG liquefaction and regasification units
- Power Generation: Steam turbines, gas turbines, hydro generators, combined-cycle power plants
- Petrochemical & Chemical: Reactor feed compressors, process pumps, agitator drives
- Marine & Offshore: FPSO propulsion systems, offshore platform rotating equipment
- Mining & Minerals: Large mill drives, crusher motors, conveyor head-end drives
- Pulp & Paper / Steel: High-speed rolls, ID/FD fans, boiler feed pumps
System Integration & Compatible Parts
The 125720-02 is designed to operate within the broader Bently Nevada 3500 Series ecosystem. Compatible and commonly paired components include:
- 3500/20 Rack Interface Module
- 3500/22M Transient Data Interface
- 3500/32 4-Channel Relay Module
- 3500/42M Proximitor / Seismic Monitor
- 3500/45 Position Monitor
- 3500/50M Tachometer Module
- 3500/92 Communication Gateway Module
- Bently Nevada 3300 XL / 3300 Series Proximitor Sensors
When sourcing replacement or spare modules, always verify the rack firmware revision and backplane configuration to ensure full compatibility.
Our Quality Assurance Process
- Source Verification: All units are sourced from authorized distributors, certified refurbishers, or decommissioned plant inventories with documented provenance.
- Visual & Physical Inspection: Each module is inspected for connector integrity, PCB condition, label legibility, and absence of physical damage.
- Functional Testing: Where test equipment is available, modules undergo bench-level functional verification prior to dispatch.
- Secure Packaging: ESD-safe packaging with anti-static bags, foam cushioning, and moisture-barrier sealing for international shipment.
- Documentation: Shipment includes part label, inspection record, and packing list. OEM manuals available upon request.
How to Order
- Submit your inquiry via the Contact / RFQ form on this page or email support@konmask.com.
- Provide your required quantity, delivery timeline, and destination country.
- Our technical team will confirm availability, lead time, and issue a formal quotation within 1 business day.
- Upon PO confirmation, we arrange export documentation, freight, and customs clearance support.
- Tracking information and shipping documents (commercial invoice, packing list, COO) are provided upon dispatch.
Why Choose Konmask.com?
- Industrial Automation Specialists: We focus exclusively on PLC, DCS, and condition monitoring components — not a generalist marketplace.
- Global Export Experience: Serving buyers in Southeast Asia, the Middle East, Europe, and the Americas with compliant cross-border logistics.
- Technical Pre-Sales Support: Our team can assist with compatibility checks, rack configuration advice, and cross-reference verification.
- Competitive Lead Times: Extensive supplier network enables faster sourcing than OEM back-order queues.
- Transparent Communication: No hidden fees. Clear quotations, honest lead times, and responsive after-sales follow-up.
Frequently Asked Questions
Q: Is the 125720-02 a new, refurbished, or used unit?
A: Stock condition varies. Please contact us to confirm the current availability status (new surplus, tested refurbished, or pull-out). All units are inspected before shipment.
Q: Can this module be used in a TMR (Triple Modular Redundant) 3500 rack?
A: The 125720-02 is compatible with standard 3500 rack configurations. For TMR-specific builds, please consult our technical team to verify the exact revision and firmware requirements.
Q: What is the typical lead time for this part?
A: Lead time depends on current stock. In-stock units typically ship within 3–5 business days. Out-of-stock sourcing may require 2–4 weeks. Contact us for a real-time availability check.
Q: Do you provide export documentation for international orders?
A: Yes. We provide commercial invoice, packing list, and certificate of origin. Additional documentation (e.g., Form E, EUR.1) can be arranged upon request.
Q: Can Konmask.com assist with identifying compatible replacement parts?
A: Absolutely. Our technical team can cross-reference part numbers, verify rack slot compatibility, and recommend equivalent or upgraded alternatives where applicable.
Q: What warranty is provided?
A: We offer a standard 90-day warranty against DOA (dead on arrival) and functional defects. Extended warranty options are available — please inquire at the time of quotation.
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