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88843-04

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The Bently Nevada 88843-04 is a dual-channel, epoxy-sealed relay module featuring internal safety barriers, designed for reliable alarm signal processing in 3300 Series monitoring systems.
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Technical specifications for 88843-04

  • Manufacturer:
    Bently Nevada
  • Part Number:
    88843-04
  • Product Family:
    3300 System
  • Channels:
    Dual Channels Independent Control
  • Isolation:
    Built-in Internal Barriers
  • Contacts:
    Single Pole Double Throw (SPDT), Fully Sealed with Epoxy Resin
  • Output Impedance:
    100 Ω. Minimum load resistance is 10 k Ω
  • 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%, noncondensing.
  • Weight:
    0.6 kg
  • Estimated shipping dimensions:
    5x11x12.8cm
  • Tariff Code:
    3902100090
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Specifications Application Scenarios Interoperability Standards

Features:

  • Dual Channels With Independent Control For Simultaneous Alarm Monitoring
  • Single-Pole Double-Throw (SPDT) Contacts Fully Sealed With Epoxy Resin
  • Built-In Internal Barriers Ensure Safe Signal Isolation From Hazardous Areas
The Bently Nevada 88843-04 Dual Epoxy Relays module is engineered for high-reliability industrial monitoring systems. It integrates dual relay outputs with robust epoxy sealing to withstand dust, moisture, and vibration, providing long-term operational stability in demanding environments.

Each channel is electrically isolated with internal barriers, allowing signals from hazardous areas to be safely processed without interfering with other monitoring channels. The module’s output impedance of 100 Ω and minimum load resistance of 10 kΩ ensures precise and consistent signal switching for critical alarm and control functions.

Designed to operate between 0°C and +65°C (+32°F to +150°F) and to be stored under temperatures from -40°C to +85°C (-40°F to +185°F) with up to 95% non-condensing humidity, the 88843-04 delivers dependable performance across a wide range of industrial conditions. Its dual-channel capability supports flexible system design, reducing the number of modules required for multiple alarm points while maintaining safe, isolated signal pathways.

The 88843-04 Bently Nevada Dual Epoxy Relays may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 88843-04 Dual Epoxy Relays Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Bently Nevada 88843-04 Dual Epoxy Relays Specs

General

  • Manufacturer GE / Bently Nevada
  • Model 88843-04
  • Condition New Original ready stock
  • Product Family 88843-01,88843-02,3300/50
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Multi-level Alarm Logic: Simultaneously handles two independent physical outputs: "Alert" and "Danger".
  • High-Risk Environment Monitoring: Provides signal isolation and protection in environments with extremely stringent explosion-proof requirements, such as oil refineries and chemical plants.
  • Rotating Machinery Protection: Used for tripping due to excessive axial displacement and radial vibration in steam turbines and compressors.
  • Critical Asset Interlocking: As a hardware-level closed-loop protection, it can still execute physical disconnection logic when the control system fails.
  • System Platform: Specifically designed for use with the Bently Nevada 3300 series monitoring frame.
  • Sensor Matching: Compatible with 3300 XL series eddy current probes and corresponding Proximitor preamplifiers.
  • Modular Design: Supports hot-swapping within the 3300 system rack (depending on specific rack configuration).
  • Logic Integration: Its dual contacts allow for easy connection to the inputs of DCS, PLC, or ESD (Emergency Stop System).
  • Intrinsic Safety Certification: Integrates internal barriers, compliant with ATEX/IECEx intrinsically safe circuit standards.
  • Industry Protection Standards: Fully compliant with API 670 mechanical protection system requirements for reliability and response time.
  • Hazardous Area Classification: Suitable for flammable and explosive environments such as Class I, Div 1, or Zone 0/1.
  • Electromagnetic Compatibility: Compliant with CE standards, ensuring no interference with low-voltage signals during relay operation.
Description
The Bently Nevada 88843-04 Dual Epoxy Relays with Internal Barriers provides robust dual-channel control for industrial monitoring applications. Its dual SPDT relay outputs, fully sealed with epoxy resin, protect against dust, moisture, and vibration, ensuring long-term operational reliability in harsh industrial environments. Internal barriers allow signals from hazardous areas to be safely introduced into the monitoring rack without risk of interference or safety compromise.

With an output impedance of 100 Ω and a minimum load resistance of 10 kΩ, the module guarantees consistent relay switching for alarm and monitoring functions. It operates in temperatures ranging from 0°C to +65°C (+32°F to +150°F) and can be stored under extreme conditions from -40°C to +85°C (-40°F to +185°F), tolerating relative humidity up to 95% non-condensing.

The dual-channel design enables simultaneous processing of two independent alarm channels, providing flexibility and efficiency for complex monitoring systems. Compared with Bently Nevada 88984-02, which also features dual epoxy sealing but focuses on single-channel output, the 88843-04 allows more independent alarms to be managed per module, reducing rack space and wiring complexity.

Its combination of dual-channel SPDT operation, epoxy sealing, internal barriers, and wide environmental tolerance makes the 88843-04 an ideal solution for critical monitoring, alarm integration, and industrial signal isolation applications.
Alternative Names
88843-01 88843-02 88843-05 88843-14
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What is the primary function of the 88843-04?
It serves as a dual-channel relay module capable of managing two independent alarm signals and safely introducing sensor inputs from hazardous areas.
Why is managing two channels simultaneously important?
It allows multiple alarms to be processed without cross-talk, improving monitoring accuracy.
What are the output requirements for the 88843-04?
The module has an output impedance of 100 Ω with a minimum load resistance of 10 kΩ.

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