Product Overview
The BENTLY NEVADA 84152-01 is a quad relay output module engineered for integration into Bently Nevada 3300 Series machinery protection systems, specifically designed as a spare relay module assembly for the 3300/20 Dual Thrust Position Monitor . As a critical output interface component, the Bently Nevada 84152-01 converts alarm logic signals from monitoring modules into isolated relay contact closures, enabling direct hardwired integration with emergency shutdown systems, annunciator panels, and plant control networks . This module is widely deployed in power generation, oil and gas, and heavy industrial applications where rotating machinery protection demands reliable discrete output signaling.
The 84152-01 Bently Nevada provides four independent relay output channels, allowing a single module to manage multiple distinct alarm conditions or control functions simultaneously . The relay construction features epoxy-sealed or hermetically sealed contacts that protect against moisture, dust, and corrosive gases commonly found in offshore platforms, chemical plants, and refinery environments . This sealed construction ensures reliable switching performance even in harsh industrial conditions where standard relays would experience premature failure from contact oxidation or contamination .
Functionally, the BENTLY NEVADA 84152-01 interfaces with monitoring modules within the 3300 rack backplane, receiving logic-level alarm signals and translating them into isolated dry contact outputs rated for industrial control voltages . The module supports both Alert and Danger alarm states, with output contacts that can be wired directly to shutdown logic solvers, motor control circuits, or DCS discrete inputs . For facilities operating 3300 Series monitoring systems on turbines, compressors, and large pumps, the 84152-01 Bently Nevada serves as the essential output stage that transforms vibration and position monitoring data into actionable protective actions.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | BENTLY NEVADA 84152-01 |
| Assembly Number | ASSY83729-01 |
| Manufacturer | Bently Nevada / GE |
| Product Type | Quad Relay Output Module |
| System Family | 3300 Series |
| Compatible Monitor | 3300/20 Dual Thrust Position Monitor |
| Relay Configuration | Quad Relay Output (4 independent channels) |
| Relay Construction | Epoxy-sealed / Hermetically sealed |
| Contact Rating (AC) | 0.5 A @ 120 VAC, 50/60 Hz |
| Contact Rating (DC) | 0.5 A @ 28 VDC |
| Isolation Voltage | 1000 V AC between input and output |
| Operating Temperature | 0°C to +65°C (+32°F to +150°F) |
| Storage Temperature | -40°C to +85°C (-40°F to +185°F) |
| Relative Humidity | To 95%, non-condensing |
| Conformal Coating | Yes (G3 corrosiveness protection) |
| Internal Safety Barrier Compatibility | Not available with Internal Safety Barriers |
| Weight | Approx. 0.34 kg |
| Country of Origin | USA |
Main Features and Advantages
Four Independent Relay Outputs: The BENTLY NEVADA 84152-01 provides four separate relay channels, enabling flexible alarm management strategies where each relay can be assigned to different alarm priorities such as Alert, Danger, System Fault, or Bypass Status . This multi-channel architecture reduces module count and simplifies cabinet wiring compared to single or dual relay alternatives.
Epoxy-Sealed Relay Construction: The 84152-01 Bently Nevada features epoxy-sealed or hermetically sealed relay contacts that isolate switching elements from environmental contaminants . This construction prevents contact oxidation and moisture-induced failures, extending operational life beyond 100,000 switching operations even in corrosive atmospheres containing hydrogen sulfide or other industrial gases .
Wide Contact Rating Compatibility: The BENTLY NEVADA 84152-01 relay contacts are rated for 0.5 A at 120 VAC or 28 VDC, suitable for directly driving indicator lamps, alarm annunciators, and low-power control relay coils . For higher current loads, the relay outputs can interface with intermediate relays or PLC discrete inputs for expanded control capability.
Conformal Coating Protection: The 84152-01 Bently Nevada is available with conformal coating that meets ANSI/ISA-S71.04 G3 corrosiveness standards, making it suitable for installation in refineries, chemical plants, and offshore facilities where airborne contaminants would degrade standard electronic assemblies .
AND Voting Logic Capability: When AND voting logic is required for alarm relay activation, the BENTLY NEVADA 84152-01 supports external series wiring of relay contacts to achieve the desired voting configuration. This external wiring approach allows application-specific voting logic without requiring module reprogramming .
