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BENTLY 3500/32 125720-01 Relay Module
Product Overview
The BENTLY 3500/32 125720-01 is a high-reliability Relay Module designed as a critical component of Bently Nevada’s 3500 Series Machinery Protection System. Engineered to provide fail-safe alarm and shutdown capabilities, this module converts monitoring data from vibration, displacement, and temperature sensors into discrete relay outputs, triggering protective actions in critical rotating equipment. As part of the 3500 Series, the 3500/32 125720-01 integrates seamlessly with other 3500 modules (e.g., vibration monitors, keyphasor modules), forming a comprehensive protection ecosystem for turbines, compressors, and generators in industries such as oil & gas, power generation, and manufacturing.
Featuring a rugged industrial design, the BENTLY 3500/32 125720-01 supports 16 isolated relay channels, each capable of switching 250 V AC/30 V DC loads up to 5 A. Its dual redundant power inputs (24 V DC) and fail-safe relay configuration ensure reliable operation even during power fluctuations. The module’s advanced diagnostics monitor relay health, contact wear, and power supply status, providing real-time feedback via LED indicators and the 3500 Series rack interface. With a wide operating temperature range (-40°C to +70°C) and compliance with industry standards like API 670, the 3500/32 125720-01 is ideal for mission-critical applications where unexpected shutdowns must be prevented or managed safely.
In automation ecosystems, the 3500/32 125720-01 serves as the final safety interface, translating monitoring data into physical actions (e.g., alarm activation, emergency shutdowns). Its hot-swappable design allows module replacement without powering down the system, minimizing downtime during maintenance. By combining high-density relay channels with robust fault tolerance, this module enhances the safety and availability of industrial machinery, making it an indispensable component for predictive maintenance strategies.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 3500/32 125720-01 |
| Manufacturer | Bently Nevada |
| Product Type | Relay Module |
| Relay Channels | 16 isolated channels |
| Contact Rating | 5 A @ 250 V AC / 5 A @ 30 V DC |
| Power Supply | 24 V DC ±10% (dual redundant inputs) |
| Input Voltage Monitoring | Yes, with fault detection |
| Physical Dimensions | 10.16 cm (H) × 16.51 cm (W) × 22.86 cm (D) |
| Weight | 0.8 kg |
| Operating Temperature | -40°C to +70°C |
| Mounting | Rack-mounted in 3500 Series enclosure |
| Relay Type | Form C (SPDT) contacts |
| Response Time | ≤10 ms |
Key Features and Advantages
High-Density Relay Configuration: The 3500/32 125720-01 offers 16 relay channels in a compact form factor, maximizing rack space efficiency. This density is ideal for large machinery protection systems requiring multiple alarm and shutdown outputs.
Dual Redundant Power Inputs: The module’s redundant 24 V DC inputs ensure continuous operation if one power source fails, eliminating single points of failure in critical safety loops.
Fail-Safe Relay Operation: Relays default to a safe state (normally open/closed as configured) during power loss or module failure, adhering to safety integrity level (SIL) requirements for critical applications.
Advanced Diagnostic Capabilities: Built-in diagnostics monitor relay contact wear, coil health, and power supply stability, providing early warnings of potential failures. LED indicators for each channel simplify troubleshooting.
Hot-Swap Capability: The module can be replaced without interrupting the rack’s operation, allowing maintenance in live systems and reducing unplanned downtime.
Wide Environmental Tolerance: Engineered to withstand extreme temperatures, vibration, and electromagnetic interference, the 3500/32 125720-01 ensures reliable performance in harsh industrial environments, such as offshore platforms and refineries.
Application Areas
The BENTLY 3500/32 125720-01 is essential for safety-critical applications across industries:
- Oil & Gas: Triggers emergency shutdowns (ESD) in compressors, pumps, and turbines at refineries and offshore rigs when vibration or temperature thresholds are exceeded, preventing hazardous situations.
- Power Generation: Manages alarm relays for steam turbines and generators, activating visual/audio alerts and protective shutdowns to maintain grid stability.
- Manufacturing: Controls safety interlocks in high-speed rotating machinery (e.g., motors, fans) in automotive and chemical plants, ensuring production continuity and operator safety.
- Mining: Deploys in crushers and material handling systems to monitor equipment health, triggering maintenance alerts before component failures occur.
Specific applications include:
- Vibration-Based Shutdowns: Routes vibration monitor outputs to relays, shutting down machinery when excessive vibrations indicate bearing failure or misalignment.
- Temperature Alarm Systems: Activates cooling systems or shuts down equipment when motor or process temperatures exceed safe limits.
- Process Interlock Control: Coordinates multiple safety signals (e.g., pressure, flow, level) to enforce interlocks in chemical processing plants.
Related Products
- 3500/33 Relay Module: A 32-channel variant of the 3500/32 125720-01 for higher-density applications, offering double the relay channels in a similar form factor.
- 3500/34T Trip Amplifier Module: Integrates with the 3500/32 125720-01 to provide tripping logic for turbine protection systems, enhancing safety redundancy.
- 3500/42M Vibration Monitor: Supplies vibration data to the 3500/32 125720-01 for alarm and shutdown activation, forming a complete protection loop.
- 3500/22M Keyphasor Module: Provides rotational reference signals to the 3500/32 125720-01, enabling phase-locked alarm triggering in rotating equipment.
- 3500/92 Communication Gateway: Enables remote monitoring of the 3500/32 125720-01 via Ethernet, integrating relay status into SCADA systems.
- 3500/05 Rack Enclosure: Houses the 3500/32 125720-01 and other 3500 modules, providing a structured and protected installation environment.
Installation and Maintenance
Pre-installation Preparations:
Before installing the BENTLY 3500/32 125720-01, ensure the 3500 Series rack is properly grounded and powered. Verify the power supply (24 V DC) and install redundant power cables for reliability. Mount the module in the rack using the provided hardware, ensuring adequate spacing for heat dissipation. Connect field wiring to the module’s terminal blocks, using shielded cables for signal lines to minimize electromagnetic interference. Configure relay settings (e.g., trip thresholds, contact type) using Bently Nevada’s 3500 configuration software, ensuring alignment with machinery protection requirements.
Before installing the BENTLY 3500/32 125720-01, ensure the 3500 Series rack is properly grounded and powered. Verify the power supply (24 V DC) and install redundant power cables for reliability. Mount the module in the rack using the provided hardware, ensuring adequate spacing for heat dissipation. Connect field wiring to the module’s terminal blocks, using shielded cables for signal lines to minimize electromagnetic interference. Configure relay settings (e.g., trip thresholds, contact type) using Bently Nevada’s 3500 configuration software, ensuring alignment with machinery protection requirements.
Maintenance Suggestions:
- Routine Inspections: Quarterly visual checks of LED indicators to verify relay status and power supply health. Use the 3500 Series software to review relay operation history and identify potential contact wear.
- Contact Resistance Testing: Annually measure contact resistance for each relay to ensure reliable switching. Replace relays with excessive resistance (typically >100 mΩ) to prevent false alarms or failed trips.
- Firmware Updates: Periodically update the module’s firmware via the 3500 rack to incorporate bug fixes and compatibility improvements, following Bently Nevada’s guidelines.
- Spare Parts Management: Store spare 3500/32 125720-01 modules in a controlled environment (10–30°C, <50% humidity) to ensure rapid replacement during failures. Test spares annually to validate functionality.
Product Guarantee
Our company provides a 12-month quality warranty for the BENTLY 3500/32 125720-01, covering hardware defects under normal use. In the event of relay contact failure, power supply issues, or functional anomalies, we offer prompt replacement services to minimize downtime. For legacy or urgent requirements, our global supply chain ensures rapid delivery of the 3500/32 125720-01 and related spares. Our technical support team assists with installation, configuration, and troubleshooting, ensuring reliable operation of your machinery protection systems.
For inquiries, contact us via WhatsApp at +86 18859254943 or email at sales@ygplc.com.
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