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The BENTLY NEVADA 170133-140-00 is an 8-channel relay output module engineered for the Bently Nevada 3500 Machinery Protection System—a globally trusted platform for continuous monitoring and protection of critical rotating equipment in power generation, oil & gas, and heavy industry. As a key interface between the 3500 system’s logic solver and external safety or control devices, the BENTLY NEVADA 170133-140-00 converts internal alarm or trip conditions into dry contact closures that can directly actuate turbine trip solenoids, emergency shutdown valves, annunciators, or PLC inputs.
Designed for high-integrity applications, the BENTLY NEVADA 170133-140-00 features electromechanical relays with galvanic isolation, ensuring robust signal separation and immunity to ground loops or electrical noise common in industrial environments. Each of its eight channels operates independently, supporting flexible configuration for alarms, warnings, or dual-redundant trip paths in compliance with API 670 and IEC 61508 standards. The BENTLY NEVADA 170133-140-00 requires no software setup—it functions as a passive, hardware-driven output stage, making it ideal for fail-safe architectures where deterministic response is non-negotiable.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | BENTLY NEVADA 170133-140-00 |
| Manufacturer | Bently Nevada (a Baker Hughes company) |
| Product Type | Relay Output Module for 3500 System |
| Number of Channels | 8 independent relay outputs |
| Contact Type | Form C (SPDT), dry contact |
| Contact Rating | 2 A @ 30 V DC; 1 A @ 120 V AC (resistive load) |
| Isolation | Channel-to-channel and channel-to-ground isolation |
| Operating Temperature | 0°C to +65°C |
| Power Consumption | < 2> |
| Mounting | Standard 3500 rack (1-slot width) |
| Communication Interface | Backplane communication with 3500 framework (no field wiring for data) |
| Certifications | CE, CSA, ATEX (when installed in certified 3500 system), compliant with API 670 |
Main Features and Advantages
Deterministic, hardware-based trip execution:
Unlike software-dependent digital outputs, the BENTLY NEVADA 170133-140-00 uses physical relays that respond immediately to internal trip commands from the 3500 monitor or comparator modules. This ensures millisecond-level actuation with zero software latency—critical for overspeed, vibration, or axial thrust trips in steam and gas turbines.
True plug-and-play operation within 3500 architecture:
The BENTLY NEVADA 170133-140-00 draws power and receives logic signals directly through the 3500 chassis backplane. No DIP switches, firmware updates, or configuration files are required. Once installed in any available slot, it automatically mirrors the alarm/trip status of assigned input channels (e.g., from 3500/42M or 3500/45 modules), simplifying commissioning and reducing human error.
Robust isolation for system integrity:
Each relay in the BENTLY NEVADA 170133-140-00 is fully isolated from adjacent channels and the system ground, preventing fault propagation in multi-trip circuits. This design supports dual-channel voting (e.g., 2oo3 logic) without cross-coupling risks—essential for SIL2-rated machinery protection systems in refineries or combined-cycle plants.
Field-proven reliability in extreme environments:
With no onboard microprocessors or sensitive semiconductors in the output path, the BENTLY NEVADA 170133-140-00 delivers decades of maintenance-free service even in high-vibration, high-EMI settings such as near generator step-up transformers or compressor trains. Its solid-state-free output stage also eliminates concerns about semiconductor latch-up or thermal runaway.
Seamless integration with third-party safety systems:
The dry contacts from the BENTLY NEVADA 170133-140-00 can directly interface with GE Mark VI trip relays, Triconex TMR inputs, Rockwell GuardLogix, or HIMA FSC systems—enabling hybrid protection architectures without signal conditioners or isolators.
Application Field
The BENTLY NEVADA 170133-140-00 is predominantly used in power generation facilities to execute emergency shutdowns of steam and gas turbines based on vibration, speed, or position thresholds detected by the 3500 system. In combined-cycle plants, multiple BENTLY NEVADA 170133-140-00 modules may be deployed to drive separate trip paths for combustion turbines, HRSG feed pumps, and condensate extraction pumps—ensuring redundancy and compliance with NFPA 85 and IEEE standards.
In the oil & gas sector, the BENTLY NEVADA 170133-140-00 interfaces with compressor anti-surge control systems and emergency isolation valves on offshore platforms and pipeline stations. Its dry contacts trigger closure of block valves or de-energize motor starters during bearing wear or seal failure events. Similarly, in petrochemical plants, the BENTLY NEVADA 170133-140-00 provides reliable trip signaling for large centrifugal compressors handling ethylene or ammonia, where unplanned downtime costs millions per hour.
Beyond traditional industries, the BENTLY NEVADA 170133-140-00 is also specified in mining (for SAG mill gearboxes), pulp & paper (turbine-driven refiners), and marine propulsion (LNG carrier cargo compressors)—anywhere critical rotating assets demand simple, fail-safe, and auditable trip outputs.
Related Products
BENTLY NEVADA 170133-140: Base model without suffix; BENTLY NEVADA 170133-140-00 is the standardized revision with updated labeling and traceability.
BENTLY NEVADA 3500/50: Full product name for the relay module series; BENTLY NEVADA 170133-140-00 is the specific part number.
BENTLY NEVADA 3500/42M: 4-channel vibration monitor that commonly drives trip logic to the BENTLY NEVADA 170133-140-00.
BENTLY NEVADA 3500/32: 4-channel relay module with higher current rating (5A); used when driving larger solenoids directly.
BENTLY NEVADA 3500/25: Keyphasor input module often paired with BENTLY NEVADA 170133-140-00 for speed-based trips.
BENTLY NEVADA 3500/45: Position monitor for thrust or differential expansion, whose alarms can activate BENTLY NEVADA 170133-140-00 relays.
BENTLY NEVADA 146039: Ribbon cable kit for connecting BENTLY NEVADA 170133-140-00 to terminal blocks in the 3500 chassis.
Installation and Maintenance
Pre-installation preparation: Before inserting the BENTLY NEVADA 170133-140-00 into the 3500 rack, ensure the system is powered down and all static precautions are observed. Verify that the target slot is not reserved for redundant power or communication modules. Confirm wiring diagrams match the intended alarm/trip assignment—each relay corresponds to a specific channel configured in the 3500 rack interface software (e.g., Rack Configuration Software or 3500 Data Manager). Use shielded, twisted-pair cables for field connections, with shields grounded only at the 3500 chassis end.
Maintenance recommendations: Although the BENTLY NEVADA 170133-140-00 contains no user-serviceable parts, periodic functional testing is recommended during plant outages. Simulate a vibration alarm or manual trip via the 3500 display or software and verify dry contact closure using a multimeter at the terminal block. Inspect terminal screws for torque integrity (0.5–0.6 N·m) and check for signs of arcing or oxidation. Replace the BENTLY NEVADA 170133-140-00 if relay chatter, delayed response, or contact welding is observed—never attempt to repair individual relays due to hermetic sealing and calibration dependencies.
