Description
Overview
The Bently Nevada 3500/91 EGD Communication Gateway Module is an industrial communication interface designed for the 3500 Machinery Protection System. This module enables high-speed data exchange between the 3500 monitoring rack and external control platforms including distributed control systems (DCS), PLCs, SCADA platforms, and turbine control systems.
Unlike standard Modbus-only communication modules, the 3500/91 supports Ethernet Global Data (EGD) communication for deterministic data transfer in controller-based environments such as GE Mark VIe systems. The module continuously acquires dynamic machinery measurements and rack status information, delivering real-time data access suitable for critical rotating equipment applications.
The gateway is engineered for power generation, oil and gas, petrochemical, and heavy industrial facilities requiring reliable machinery protection integration over Ethernet networks.
Key Features
- High-speed Ethernet Global Data (EGD) communication
- Real-time transmission of rack monitoring data
- Compatible with GE Mark VIe and EGD-enabled controllers
- Continuous access to vibration and protection measurements
- Supports rack-wide status and alarm reporting
- Designed for controller response applications
- Rack-powered module with single-slot installation
- Industrial-grade EMC and environmental performance
Technical Specifications
| ParameterSpecification |
|
| Product Model |
3500/91 |
| Product Type |
EGD Communication Gateway Module |
| System Compatibility |
Bently Nevada 3500 Series |
| Installation Type |
Rack-mounted |
| Slot Requirement |
Single-slot module |
| Power Consumption |
7.4 W |
| Power Source |
Supplied by 3500 rack |
| Communication Method |
Ethernet Global Data (EGD) |
| Ethernet Interface |
Industrial Ethernet |
| Protocol Support |
EGD |
| Data Exchange Type |
Real-time controller communication |
Monitored Data Transmission
The module provides access to comprehensive rack information, including:
- Overall vibration values
- Radial vibration measurements
- Axial position data
- Speed and Keyphasor® signals
- Temperature channels
- Alarm and danger states
- Channel OK and module status
- Rack event information
- System diagnostic data
Communication Performance
| FeatureDetails |
|
| Network Function |
Deterministic Ethernet communication |
| Controller Compatibility |
GE Mark VIe and EGD-capable systems |
| Response Capability |
Suitable for fast-response control applications |
| Data Access |
Rack-wide parameter acquisition |
| Integration Method |
Ethernet-based industrial automation networks |
Physical Specifications
| ItemValue |
|
| Dimensions (H × W × D) |
241.3 mm × 24.4 mm × 241.8 mm |
| Weight |
0.79 kg |
| Module Format |
Full-height rack module |
Environmental Specifications
| ParameterSpecification |
|
| Operating Temperature |
-30°C to +65°C |
| Storage Temperature |
-40°C to +85°C |
| Humidity |
Up to 95% non-condensing |
| EMC Compliance |
Industrial EMC compliant |
LED Status Indicators
The front panel includes integrated diagnostic LEDs for operational monitoring:
| IndicatorFunction |
|
| OK |
Module operating condition |
| TX/RX |
Ethernet communication activity |
| Bypass |
Indicates bypass operation status |
Application Industries
The Bently Nevada 3500/91 communication gateway is commonly deployed in:
- Gas turbine control systems
- Steam turbine monitoring
- Compressor protection systems
- Power generation facilities
- LNG and petrochemical plants
- Offshore production platforms
- Critical rotating machinery systems
3500/91 vs 3500/90 Communication Module
| Feature3500/913500/90 |
|
|
| Primary Communication |
EGD Ethernet |
Modbus TCP / Serial |
| Network Type |
Deterministic controller network |
General industrial communication |
| Typical Integration |
GE Mark VIe systems |
PLC/DCS/SCADA |
| Communication Speed |
High-speed Ethernet |
Ethernet and serial |
| Application Focus |
Turbine control integration |
General plant connectivity |
FAQ
What is the primary function of the 3500/91 module?
The module transfers real-time machinery protection and monitoring data from a 3500 rack to external Ethernet-based control systems using the EGD protocol.
Does the 3500/91 support Modbus communication?
The 3500/91 is primarily designed for Ethernet Global Data (EGD) communication. Modbus-based communication is typically handled by the 3500/90 gateway module.
Which systems commonly use the 3500/91 gateway?
The module is widely used with GE turbine control platforms such as Mark VIe systems and other EGD-compatible industrial controllers.
Can the module transmit alarm and diagnostic information?
Yes. The gateway communicates rack alarms, module diagnostics, event data, and operational status in addition to process measurements.
