BENTLY 3500/25 184684-01

Description

Detailed parameter table

BENTLY 3500/25 184684-01

Product introduction

The 3500/25 184684-01 from Bently Nevada is a critical relay output module in the 3500 Machinery Protection System, serving as the interface between monitoring modules and protective action devices. This 2-slot module features 8 Form C (changeover) relays that translate alarm signals from monitoring components into physical protective actions, such as shutdowns, alarms, or control system interventions. As the enforcement layer of 3500 systems, 3500/25 184684-01 ensures that critical machinery is protected when abnormal conditions are detected, working in tandem with communication modules like 3500/05-01-03-00-00-00 (connected via cables such as 133292-01 for configuration) to provide a complete protection loop.

Bently Nevada’s 3500/25 184684-01 receives alarm commands from monitoring modules (like 3500/44M 176449-03) through the 3500 rack backplane, then activates the appropriate relays to trigger predefined protective responses. Installed in 125744-02 racks and powered by 3500/15 106M1079-01 supplies, it acts as the final link in the protection chain—converting digital alarm signals into tangible actions that prevent machinery damage. This module is essential in industrial environments where timely protective actions can mean the difference between minor issues and catastrophic failures.

Core advantages and technical highlights

High-density relay configuration: The 3500/25 184684-01 features 8 independent Form C relays in a 2-slot form factor, providing a compact solution for multiple protective actions. Each relay offers normally open (NO), normally closed (NC), and common contacts, allowing flexible wiring to control systems, annunciators, or shutdown circuits. This density eliminates the need for external relay panels, reducing system complexity and installation space requirements.

Fast response time: With a relay activation time of less than 10 ms, 3500/25 184684-01 ensures rapid protective action when critical alarms are detected. This speed is crucial for preventing machinery damage in scenarios where seconds matter, such as sudden vibration spikes or axial position excursions in high-speed rotating equipment.

Robust contact rating: Each relay contact is rated for 5 A at 250 VAC or 30 VDC, making the module compatible with a wide range of industrial control devices. This rating allows direct control of small motors, solenoid valves, and contactors, eliminating the need for intermediate relays in many applications.

Configurable operation: The module’s relays can be independently configured for latching or non-latching operation, with adjustable time delays for both activation and deactivation. This flexibility allows customization of protection strategies to match specific machinery requirements, preventing nuisance trips while ensuring reliable response to genuine faults. Configuration is simplified through connection to 3500/05-01-03-00-00-00 modules, often using 133292-01 cables for setup.

Typical application scenarios

Turbine protection systems

In power generation turbines, 3500/25 184684-01 modules translate vibration, temperature, and position alarms from 3500/44M 176449-03 monitors into protective actions. Specific relays trigger alarm annunciators, control room displays, and, in critical cases, turbine shutdown sequences. The module’s fast response time ensures that overspeed conditions or severe vibration are addressed before catastrophic damage occurs, while configurable delays prevent unnecessary shutdowns from transient conditions.

Compressor safety systems

Oil and gas compressor stations utilize 3500/25 184684-01 to implement multi-level protection strategies. Relays are configured to first trigger local alarms and control room notifications (via signals routed through 3500/05-01-03-00-00-00 modules connected with 133292-01 cables), then activate lube oil system adjustments, and finally initiate emergency shutdowns if conditions worsen. This tiered approach maximizes operational availability while ensuring equipment protection.

Manufacturing line protection

In manufacturing facilities, 3500/25 184684-01 modules protect production-critical motors and gearboxes by triggering conveyor stops, process interruptions, or maintenance alerts when abnormal vibration or temperature conditions are detected. The relays interface with programmable logic controllers (PLCs) to integrate machinery protection with production control systems, ensuring coordinated responses that minimize downtime while preventing equipment damage.

BENTLY 3500/25 184684-01

Related model recommendations

3500/05-01-03-00-00-00: Communication module that configures and monitors 3500/25 184684-01 via 133292-01 cables.

3500/44M 176449-03: Monitoring module that sends alarm signals to the relay module.

3500/15 106M1079-01: Power supply module providing regulated power to the relay module.

125744-02: Rack assembly housing the relay module and associated components.

133292-01: Communication cable for configuration and status monitoring connections.

136180-01: Configuration module for programming relay logic and operation parameters.

3500/60 163179-01: Display module showing relay activation status and alarm conditions.

Installation, commissioning and maintenance instructions

Installation

Install 3500/25 184684-01 in a 125744-02 rack with a properly configured 3500/15 106M1079-01 power supply. Ensure two adjacent slots are available, typically positioned near monitoring modules for efficient backplane communication. Connect control wiring to relay terminals, ensuring proper wire gauge (14-22 AWG) and torque (0.5-0.6 N·m) for terminal screws. Use shielded cables for sensitive control circuits and route wiring separately from power conductors to minimize interference. Connect configuration interfaces via 133292-01 cables to 3500/05-01-03-00-00-00 modules for setup and monitoring.

Commissioning

After installation, configure the module using 136180-01 tools or via communication with 3500/05-01-03-00-00-00 modules. Program each relay’s function, including associated alarm sources, latching behavior, and time delays. Test relay operation by simulating alarm conditions from connected monitoring modules, verifying both contact activation and proper indication on status displays. Confirm that protective actions (such as shutdown circuits) function correctly when relays activate, and ensure deactivation behavior meets safety requirements. Document relay assignments and test results for future reference.

Maintenance

Include 3500/25 184684-01 in quarterly safety system inspections. Verify all status indicators function correctly and confirm relay contacts show no signs of pitting or corrosion during visual inspections. Perform annual contact resistance testing using a micro-ohmmeter to ensure contacts remain within specification (<100 mΩ). Test relay operation by manually activating each relay through configuration software (connected via 133292-01 cables) and verifying proper response. Clean terminal blocks annually using approved electronic contact cleaner and tighten any loose connections. Replace the module if relays fail to operate correctly or contact resistance exceeds specifications.

Service and guarantee commitment

Bently Nevada provides the 3500/25 184684-01 with a 36-month warranty covering manufacturing defects and performance issues under normal operating conditions, including relay reliability, response time, and component durability when powered by compatible supplies like 3500/15 106M1079-01. Our technical support team offers expert guidance on relay configuration, safety system integration, and troubleshooting interactions with modules like 3500/05-01-03-00-00-00 and cables such as 133292-01.

We offer specialized training on relay logic programming, safety instrumented system design, and maintenance procedures specific to 3500/25 184684-01. Beyond the warranty period, our service agreements include functional testing, contact cleaning, and expedited replacement services to ensure continuous protection system operation. Bently Nevada’s commitment to quality ensures reliable protective action capability throughout the module’s operational lifecycle, backed by our global network of service professionals.