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BENTLY 3500/34 Relay Module
Product Overview
The BENTLY 3500/34 is a high-reliability Relay Module designed as a critical component of Bently Nevada’s 3500 Series Machinery Protection System, a leading platform for rotating equipment health monitoring. Engineered to convert monitoring system outputs into discrete relay signals for alarm activation or emergency shutdowns, this module plays a pivotal role in safeguarding turbines, compressors, and generators across industries such as oil & gas, power generation, and manufacturing. As part of the 3500 Series, the 3500/34 integrates seamlessly with other 3500 modules (e.g., vibration monitors, keyphasor modules), providing a robust interface between machinery protection systems and field devices.
Featuring a rugged industrial design, the BENTLY 3500/34 supports up to 16 independent relay channels, each capable of switching 250 V AC or 30 V DC loads. Its dual redundant power inputs and fail-safe relay configuration ensure reliable operation in mission-critical applications, where unexpected equipment failures could lead to safety hazards or production losses. The module’s hot-swappable architecture allows for maintenance without powering down the system, minimizing downtime, while built-in LED indicators provide real-time status feedback for each relay channel. Compatibility with industry standards like API 670 and IEC 61508 further reinforces its role in safety-instrumented systems (SIS).
In automation ecosystems, the 3500/34 serves as the bridge between monitoring modules and field actuators, translating vibration, displacement, or temperature alarms into physical actions (e.g., valve closure, motor shutdown). Its configurable relay settings (e.g., latching/non-latching, normally open/closed) adapt to diverse application needs, while diagnostic feedback via the 3500 Series rack interface enables proactive maintenance. By delivering precise and reliable relay outputs, this module enhances the safety and operational efficiency of industrial machinery, making it an indispensable component of predictive maintenance strategies.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 3500/34 |
| Manufacturer | Bently Nevada |
| Product Type | Relay Module |
| Relay Channels | 16 isolated channels |
| Switching Capacity | 250 V AC @ 5 A, 30 V DC @ 5 A |
| Relay Type | Electro-mechanical (SPDT) |
| Power Supply | 24 V DC ±10% (dual redundant inputs) |
| 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 |
| Certifications | CE, UL, cUL, API 670, IEC 61508 (SIL 2) |
Key Features and Advantages
High-Density Relay Configuration: The 3500/34 supports 16 independent relay channels in a compact form factor, maximizing rack space efficiency. This density is ideal for complex machinery protection systems requiring multiple alarm and shutdown outputs.
Dual Redundant Power Inputs: The module’s redundant 24 V DC power inputs eliminate single points of failure, ensuring continuous operation even if one power source fails. This resilience is critical for maintaining safety functions in 24/7 industrial operations.
Fail-Safe Relay Operation: Relays default to a safe state (normally open/closed as configured) during power outages or module faults, adhering to safety standards and preventing uncontrolled equipment operation.
Hot-Swap Capability: The module can be replaced without disrupting the rack’s power or communication, allowing maintenance during live operation. This feature minimizes downtime in critical processes where system shutdowns are costly.
Comprehensive Diagnostic Features: Built-in diagnostics monitor relay health, power supply status, and channel activity, with LED indicators providing visual feedback. Alarms and fault codes are transmitted to the rack’s main processor for centralized monitoring.
Flexible Relay Settings: Each channel supports configurable latching/non-latching operation and voltage/current ratings, adapting to diverse field device requirements. This flexibility reduces the need for external signal conditioning.
Application Areas
The BENTLY 3500/34 is essential for safety and alarm systems in industries where equipment protection is non-negotiable:
- Oil & Gas: Triggers emergency shutdowns (ESD) in compressors, pumps, and offshore platforms when vibration levels exceed safe limits, preventing catastrophic failures and environmental hazards.
- Power Generation: Controls turbine trip systems in thermal and nuclear power plants, ensuring rapid response to critical faults like overspeed or bearing overheating.
- Manufacturing: Manages safety interlocks in high-speed rotating machinery (e.g., motors, fans) in automotive and chemical plants, protecting equipment and personnel from operational risks.
- Mining and Metals: Activates alarms and shutdowns in crushers and mills, reducing unplanned downtime and maintenance costs in harsh mining environments.
Specific applications include:
- Vibration-Based Shutdowns: Relays trigger when vibration amplitude exceeds preset thresholds, common in turbine and compressor protection systems.
- Bearing Temperature Alarms: Converts temperature monitor outputs into relay signals for cooling system activation or emergency shutdowns.
- Process Interlock Control: Coordinates with other safety systems to ensure sequential shutdowns in complex industrial processes, such as chemical reactors.
Related Products
- 3500/32M Relay Module: A 8-channel variant of the 3500/34, suitable for smaller systems or distributed relay applications.
- 3500/42M Vibration Monitor: Works in tandem with the 3500/34 to provide vibration data that drives relay actions.
- 3500/22M Keyphasor Module: Supplies rotational reference signals to the 3500/34, enabling phase-locked relay activation for dynamic machinery conditions.
- 3500/15 Power Supply Module: Provides redundant power to the 3500/34 and other 3500 Series modules, ensuring reliable operation.
- 3500/92 Communication Gateway: Integrates the 3500/34 with SCADA systems, enabling remote relay status monitoring and configuration.
- 3500/05 Rack Enclosure: Houses the 3500/34 and other modules, providing a structured and protected installation environment.
Installation and Maintenance
Pre-installation Preparations:
Before installing the BENTLY 3500/34, ensure the 3500 Series rack is properly grounded and ventilated. 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 devices to the module’s terminal blocks, using shielded cables for signal lines to minimize electromagnetic interference. Configure relay settings (e.g., trip thresholds, latching mode) using Bently Nevada’s 3500 configuration software.
Before installing the BENTLY 3500/34, ensure the 3500 Series rack is properly grounded and ventilated. 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 devices to the module’s terminal blocks, using shielded cables for signal lines to minimize electromagnetic interference. Configure relay settings (e.g., trip thresholds, latching mode) using Bently Nevada’s 3500 configuration software.
Maintenance Suggestions:
- Routine Inspections: Quarterly visual checks of LED indicators to verify relay status and power health. Use the rack’s diagnostic interface to review relay operation history and fault logs.
- Relay Life Cycle Management: Replace relays every 5–7 years or after 100,000 operations to prevent contact wear, especially in high-usage applications. Document replacement schedules for compliance.
- Redundancy Testing: Annually simulate power failures to verify redundant power switching and relay fail-safe behavior, ensuring system reliability during emergencies.
- Environmental Management: Keep the module’s enclosure free of dust and debris to prevent overheating, using compressed air or a soft brush for cleaning. Maintain control room temperature (20–25°C) and humidity (40–60%).
Product Guarantee
Our company provides a 12-month quality warranty for the BENTLY 3500/34, covering hardware defects under normal use. In the event of relay failure or operational anomalies, we offer prompt replacement services to minimize downtime. For legacy or urgent requirements, our global supply chain ensures rapid delivery of the 3500/34 and related spares. Our technical support team assists with installation, configuration, and troubleshooting, delivering reliable solutions to maintain your machinery protection system’s integrity.
For inquiries, contact us via WhatsApp at +86 18859254943 or email at sales@ygplc.com.
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