Product Short Description
350025-01-01-00 (front main module) and 125800-01 (rear termination module) form a complete original 3500/20 System Interface Module set manufactured by Bently Nevada (Baker Hughes USA). It is the core communication and data gateway component of the 3500 Series Machinery Protection & Condition Monitoring System.
This complete set undertakes system internal bus data aggregation, external communication conversion, status monitoring, system clock management and external signal wiring functions. It realizes two-way data interaction between internal 3500 system monitoring bus and upper computer System 1 diagnostic platform, DCS, PLC and SCADA systems.
Description
Basic Identification Parameters
- Brand: Bently Nevada
- Complete Part Number Set: 350025-01-01-00 (Front Module) + 125800-01 (Rear Termination Module)
- System Matching Model: 3500/20 System Interface Communication Module
- Product Type: System Gateway Communication Interface + Rear External Termination Module Set
- Origin: United States
- Total Product Weight: 0.58 kg
- Factory Warranty Period: 12 months original factory warranty
- Overall Dimensions: 241.3 mm × 24.4 mm × 99.1 mm
- Mounting Mode: Standard 19-inch EIA industrial rack plug-in installation, installed in dedicated interface slot of 3500 system rack
- Protection Grade: IP20
- Certifications: CE, UL, CSA, ATEX/IECEx Hazardous Area Certification, API 670 Compliant
Electrical Specifications (Front Module 350025-01-01-00)
- System Power Supply: 18–36 V DC, supplied by 3500 main rack power supply
- Total Power Consumption: ≤4.8 W
- Internal Communication: Dedicated high-speed 3500 system internal monitoring bus
- External Communication Interfaces:
- RS232 Serial Communication Port
- RS485 Serial Communication Port
- 10/100 Base-T Ethernet Modbus TCP Communication Port
- Communication Isolation Level: 2500 Vrms external port-to-system bus galvanic isolation
- System Functions: Internal bus data aggregation, system clock synchronization, module status management, alarm event recording, data packaging upload
- Status Indication: Power OK, Communication OK, Fault, Alarm status indicator lights
- Response Time: Internal data refresh ≤100 ms
Mechanical & Termination Specifications (Rear Module 125800-01)
- Matching Front Module: 350025-01-01-00 3500/20 interface front module
- Structure: Rear plug-in external termination module
- Terminal Type: Green pluggable anti-loosening screw terminal blocks
- Terminal Functions: External communication cable wiring, system status signal wiring, dry contact status output wiring
- Internal Connection: Standard gold-plated rear bus connector, stable contact with front module
- Wiring Mode: Independent external termination wiring, separates field communication cables from internal system bus
Environmental Specifications
- Operating Temperature Range: -40 ℃ to +70 ℃
- Storage Temperature Range: -51 ℃ to +85 ℃
- Operating Humidity: 0%–95% RH, non-condensing
- Shock Resistance: 10 g peak anti-vibration performance
- Electromagnetic Compatibility: Fully meets industrial EMC anti-interference standards, adapts to strong EMI industrial sites
Core Functional Features
- Complete Front + Rear Integrated Set Design
Front communication main module + rear external termination module complete matching set, seamless electrical and mechanical connection, no compatibility problems.
- Multi-Mode External Communication Gateway Function
Integrates RS232, RS485 and Ethernet Modbus TCP triple communication modes, realizes flexible connection with various upper computer control systems.
- System Internal Bus Data Centralized Management
Aggregates all monitor module data (vibration, thrust, temperature, process variable, speed, alarm, trip) from entire 3500 rack internal bus.
- Full Galvanic Isolation Communication Architecture
Complete external port-to-system isolation thoroughly suppresses ground loop interference, common-mode noise and surge impact on communication lines.
- Real-Time System Status Monitoring & Diagnosis
Built-in complete self-diagnosis function, real-time monitoring of system power, communication, module operating status, automatically uploads fault information.
- External Termination Rear Module Design (125800-01)
Independent external rear terminals, convenient for field communication cable wiring, inspection and maintenance, clearly separates communication wiring from signal wiring.
- Plug-in Hot-Swap Structure
Supports online plug and replacement without powering down the entire monitoring system, greatly reduces maintenance downtime.
- Complete Failsafe Protection Logic
Automatically enters safe state under communication abnormal, power failure and module fault conditions, avoids system misoperation and false alarms.
- System Clock Synchronization Management
Provides unified clock benchmark for all monitoring data and event records, ensures accurate time stamping of fault and alarm events.
Applicable Application Scenarios
- Power generation industry: Steam turbines, gas turbines, turbo-generator units, combined cycle power plants
- Petroleum & petrochemical industry: Centrifugal compressors, process pumps, fans, offshore platform rotating machinery
- Chemical industry: Large high-speed compressors, reciprocating machinery, high-speed gearboxes
- Metallurgy, cement & mining industry: Rotary kilns, grinding mills, large fans, heavy rotating equipment
- Water conservancy & wastewater treatment: Large vertical pumps, circulating water pump units
- Marine industry: Ship propulsion machinery and auxiliary rotating power equipment
- Hazardous area industrial sites with ATEX/IECEx certification requirements
- OEM machinery manufacturing and industrial predictive maintenance condition monitoring systems
System Compatibility
- Fully compatible with Bently Nevada 3500 series full monitoring system: 3500/05 rack, 3500/15 power supply modules, all monitor modules, I/O modules, relay modules and keyphasor modules
- Perfectly matches all 3300 XL NSv series sensors, probes and cables you previously queried
- Seamlessly connects to System 1 diagnostic analysis platform, PLC, DCS and SCADA control systems via RS232/RS485/Ethernet Modbus TCP
- Compatible with official 3500 rack configuration software V3.3 and above versions
- Fully complies with API 670 international machinery protection standard requirements






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