Bently Nevada 82926-01 XDCR I/O Record Terminals Module | 3300 Series Relay Interface | NINERMAS

82926-01 Industrial Relay Output Module (High-Reliability Machinery Protection Interface)

Engineered for mission-critical applications, the 82926-01 relay output module delivers fail-safe signal conversion for industrial machinery protection and emergency shutdown systems. This robust interface transforms monitor alarm outputs into isolated relay contact closures, creating a hardwired safety layer between condition monitoring equipment and emergency response logic across turbomachinery, compressor stations, and rotating equipment installations.

Designed for seamless integration with 3300/01 series monitoring platforms, this module addresses the fundamental challenge of translating electronic alarm signals into actionable control commands. Target users include instrumentation engineers, plant maintenance teams, and system integrators responsible for turbine protection, compressor safety systems, and critical process equipment monitoring in power generation, oil & gas, petrochemical, and heavy manufacturing sectors.

The 82926-01 stands apart through its de-energize-to-trip safety architecture, 2500VAC galvanic isolation, and API 670 compliance—delivering the reliability demanded by applications where equipment failure could result in catastrophic damage, production losses, or safety incidents. With field-proven MTBF exceeding 500,000 hours, this module provides the foundation for dependable machinery protection across the harshest industrial environments.

Core Capabilities & Industrial Value

→ Fail-Safe Protection Architecture
De-energize-to-trip relay logic ensures automatic machinery shutdown during power loss, module failure, or wiring faults—eliminating single-point vulnerabilities in safety-critical applications. This inherently safe design meets API 670 requirements for machinery protection systems in petroleum and natural gas industries.

✓ High-Current Contact Rating
5-ampere SPDT (Form C) contacts directly drive solenoid valves, annunciator panels, and control circuit loads without intermediate amplification. Silver alloy contacts with gold flash plating deliver 100,000+ operation cycles at rated load, reducing maintenance frequency and lifecycle costs.

✓ Complete Electrical Isolation
2500VAC isolation barrier between relay coil and contacts eliminates ground loops, protects sensitive monitoring circuits from field voltage transients, and enables safe integration with diverse control system voltages (24VDC to 250VAC)—critical for multi-vendor system architectures.

✓ Rapid Response Performance
Typical 10-millisecond actuation time ensures immediate alarm propagation from vibration monitors, tachometers, or temperature sensors to shutdown logic—minimizing the window between fault detection and protective action in high-speed rotating equipment.

✓ Universal Monitor Compatibility
Interfaces with all 3300 series condition monitoring modules including proximity probes, velocity sensors, and temperature monitors—providing a standardized relay output solution across diverse machinery protection portfolios.

✓ Industrial Environmental Resilience
-30°C to +65°C operating range, conformal coating protection, and vibration-resistant construction enable reliable operation in turbine enclosures, compressor buildings, and outdoor equipment installations where temperature extremes and mechanical stress challenge commercial-grade components.

Industrial Application Scenarios

Steam & Gas Turbine Emergency Shutdown
In power generation facilities, the 82926-01 creates the critical hardwired link between vibration monitoring systems and turbine trip logic. When bearing vibration exceeds danger setpoints, the relay module instantly opens contacts to de-energize trip solenoids, initiating emergency shutdown sequences that prevent catastrophic bearing failure and rotor damage. This application demands the module's fail-safe design—ensuring turbine protection even during monitoring system power loss.

Compressor Station Safety Systems
Reciprocating and centrifugal compressor installations deploy multiple 82926-01 modules to monitor vibration, temperature, and speed parameters simultaneously. Each module converts individual monitor alarms into discrete relay outputs feeding PLC safety logic or standalone shutdown panels. The galvanic isolation prevents ground loops in electrically noisy compressor environments, while high contact ratings directly drive hydraulic valve solenoids without intermediate relays.

Distributed Control System Integration
The relay contacts provide hardwired alarm inputs to DCS platforms, creating a redundant alarm path independent of communication networks. When paired with 4-20mA analog signals from the same monitors, this dual-path architecture ensures alarm integrity during Modbus failures, Ethernet outages, or protocol conversion errors—addressing a critical vulnerability in network-dependent control systems.

Multi-Train Machinery Protection
Paper mills, steel plants, and chemical facilities with multiple parallel process trains use 82926-01 modules to create centralized alarm annunciation panels. Each module converts alarms from pumps, fans, or gearboxes into relay outputs feeding common annunciator systems, enabling operators to monitor dozens of machines from a single control room location while maintaining individual machine isolation.

Legacy System Modernization
When upgrading pneumatic or electromechanical protection systems to electronic monitoring, the 82926-01 preserves existing relay-based shutdown logic. This allows phased migration strategies where new vibration monitors replace obsolete sensors while retaining proven trip circuits—reducing project risk and capital expenditure compared to complete system replacement.

Technical Parameters & Selection Criteria

Selection Guidelines: Choose the 82926-01 when your application requires hardwired relay outputs from 3300/01 series monitors. Verify that connected loads remain within the 5A contact rating—for higher currents, use the relay module to drive intermediate contactors. Ensure 24VDC power supply meets industrial noise immunity standards (ripple <5%, transient protection). For SIL-rated safety instrumented systems, consult factory regarding certification documentation and proof-test intervals.

Advanced Integration Features

Modular System Architecture: The 82926-01 integrates into 3300 rack-based monitoring systems alongside backplane modules, power supplies, and auxiliary I/O. This modular approach enables scalable protection schemes from single-machine installations to plant-wide monitoring networks with hundreds of measurement points.

Redundant Alarm Paths: Deploy multiple relay modules per monitor to create voting logic or redundant trip circuits. Common configurations include 2-out-of-3 voting for critical turbines or dual-path alarms feeding separate DCS and standalone shutdown systems—meeting defense-in-depth safety principles.

Remote Monitoring Compatibility: While the relay module provides local hardwired outputs, it operates in parallel with monitor analog outputs and digital communication interfaces. This enables simultaneous local shutdown capability and remote condition monitoring via SCADA systems—balancing immediate protection with predictive maintenance data collection.

Customization Options: Contact factory for custom contact configurations, alternative coil voltages, or extended temperature ratings for specialized applications. Lead time for custom variants typically ranges 6-8 weeks depending on specification complexity.

Delivery Timeline & Service Commitment

Standard Delivery: Stock units ship within 24-48 hours via express courier for critical machinery protection applications. Standard lead time is 3-5 business days for most global destinations.

Custom Configurations: Modified units with alternative specifications require 6-8 weeks manufacturing lead time plus shipping.

Warranty Coverage: Comprehensive 12-month warranty covers manufacturing defects and workmanship. Warranty includes replacement unit advance shipment for critical applications to minimize downtime.

Technical Support: Application engineering assistance available for system design, compatibility verification, and troubleshooting. Support includes installation guidance, wiring diagrams, and integration with existing 3300 series installations.

Documentation Package: Each module ships with installation manual, wiring diagrams, dimensional drawings, and compliance certificates. CAD models and relay contact specifications available for download.

Frequently Asked Questions

What is the maximum wiring distance between the monitor and this relay module?
The module supports cable runs up to 300 meters (1000 feet) using shielded twisted-pair cable (minimum 18 AWG). For longer distances, consider signal repeaters or 4-20mA output options with higher noise immunity.

Can I connect multiple loads to a single relay contact?
Yes, provided the combined current draw remains below 5A and all loads share compatible voltage ratings. Use appropriate wire gauge and circuit protection for parallel loads. For inductive loads (solenoids, contactors), install suppression diodes or RC snubbers to extend contact life.

How do I configure the alarm setpoints that trigger the relay?
Setpoints are configured on the connected monitor module (vibration monitor, tachometer, etc.), not on the relay module itself. The 82926-01 simply converts the monitor's alarm output signal into a relay contact closure—it does not process or adjust alarm thresholds.

Is this module suitable for SIL-rated safety instrumented systems?
The 82926-01 meets API 670 requirements for machinery protection but is not IEC 61508 SIL-certified. For safety instrumented systems requiring SIL 2/3 certification, consult factory regarding certified relay modules with documented failure rates and proof-test procedures.

What happens to the relay state during power loss?
The module uses de-energize-to-trip logic—relay contacts return to their de-energized (alarm) state when power is lost. This fail-safe behavior ensures machinery protection even during power supply failures, meeting safety system design principles.

Can I use this module with 3500 series monitors?
No, the 82926-01 is specifically designed for 3300/01 series systems. The 3500 series uses different relay modules integrated within rack I/O modules or requires external relay interfaces with compatible signal levels.

Ready to Enhance Your Machinery Protection System?

Contact our machinery protection specialists for application consultation, compatibility verification with your existing 3300 series installation, or technical support. Our team provides system design assistance, wiring guidance, and integration recommendations to ensure reliable operation in your specific industrial environment.

Request a quote today or speak with an application engineer to discuss your emergency shutdown requirements, alarm annunciation needs, or machinery protection challenges.

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