Description
Product Overview
The Bently Nevada 161204-01 is designed to provide a communication path between a 3500 machinery protection rack and compatible controller systems. In rotating-equipment applications, the 3500 rack monitors machinery conditions and reports supported measurements and status information. The 3500/91 EGD gateway makes selected rack data available over Ethernet for integration with controllers that support the required communication protocol. This can reduce the need to reproduce every monitored value through separate hardwired connections, although the actual integration depends on the control-system design.
The gateway supports EGD version 2.01 and Ethernet UDP/IP. Its Ethernet connection is provided through a separate I/O module, so the interface type must be checked as part of the complete assembly. The copper version uses the 161216-01 10BASE-T/100BASE-TX I/O module; the 161216-02 provides the 100BASE-FX fiber-optic interface. The main module and I/O module perform different roles, and ordering the main module alone may not provide the complete hardware needed for a particular installation.
Commissioning requirements deserve particular attention when replacing this gateway. The manufacturer’s datasheet specifies a compatible 3500/22M TDI for communication with monitor modules, 3500 Rack Configuration Software version 3.70 or later, and TDI firmware version 1.20 or later. It also limits the rack to one 3500/91 EGD gateway. Firmware requirements for consumed exchanges may apply when that feature is used. Check the existing system configuration and applicable manual before changing hardware; a physical fit alone does not establish operational compatibility.
Product Introduction
The 161204-01 is intended for installations that need to share supported machinery-monitoring data from a Bently Nevada 3500 rack with compatible external controllers. Typical integration work includes making rack, module, channel, and status information available to supervisory control applications.
For maintenance and procurement, verify the full 3500/91 assembly, the Ethernet I/O variant, the installed TDI, software and firmware versions, and the receiving controller’s EGD support. For a replacement unit, also request the hardware revision, condition details, and evidence of functional testing.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product model | 161204-01 |
| Manufacturer | Bently Nevada |
| Product type | EGD communication gateway main module |
| System family | 3500/91 |
| Primary function | Communication of supported rack-monitored values and status |
| Supported protocols | EGD v2.01, Ethernet UDP/IP |
| Ethernet standard | IEEE 802.3; interface depends on the associated I/O module |
| Typical power consumption | 7.4 W |
| Operating temperature | −30°C to +65°C |
| Storage temperature | −40°C to +85°C |
| Humidity | Up to 95%, noncondensing |
| Rack requirement | One full-height front slot for the main module; separate I/O module occupies a rear slot |
| Required monitoring interface | 3500/22M TDI |
| Configuration software | Version 3.70 or later, per datasheet |
| TDI firmware | Version 1.20 or later, per datasheet |
| Maximum EGD gateways | One per rack |
| Copper Ethernet I/O module | 161216-01, 10BASE-T/100BASE-TX |
| Fiber-optic Ethernet I/O module | 161216-02, 100BASE-FX |
| Condition | Confirm actual condition with supplier |
Specifications are taken from the 3500/91 EGD gateway datasheet. Confirm the applicable revision and system configuration before using them for engineering acceptance.

161204-01
Related Products
- 161216-01 — Copper Ethernet I/O module for 10BASE-T/100BASE-TX connections.
- 161216-02 — Fiber-optic Ethernet I/O module for 100BASE-FX connections.
- 161232 — 3500/91 user guide, useful for installation and configuration checks.
- 3500/22M TDI — Required interface for communication between the 3500/91 EGD gateway and monitor modules.
- 190782-01 — Main module listed for the 3500/91M EGD gateway family; verify the hardware generation and approved configuration before considering it as an alternative.
Frequently Asked Questions
Q1: What does the Bently Nevada 161204-01 do?
It is the main module of the 3500/91 EGD communication gateway. It enables supported machinery-monitoring values and status information from the 3500 rack to be shared with compatible external controllers.
Q2: Does the 161204-01 include the Ethernet port?
The Ethernet interface is provided through a separate I/O module. Confirm whether the required 161216-01 copper or 161216-02 fiber-optic module is included in the assembly being purchased.
Q3: Which communication protocols does the 3500/91 support?
The published datasheet specifies EGD version 2.01 and Ethernet UDP/IP. The receiving controller must support the required protocol and data configuration.
Q4: What system requirements should be checked before installation?
The datasheet specifies a 3500/22M TDI, 3500 Rack Configuration Software version 3.70 or later, and TDI firmware version 1.20 or later. Only one 3500/91 EGD gateway is allowed per rack. Check feature-specific firmware requirements if consumed exchanges are used.
Q5: Can the 161204-01 be replaced while the system is running?
Do not assume online replacement is permitted. Follow the applicable hardware manual and site maintenance procedure, including any required operational safeguards and authorization.
Q6: What should buyers verify before ordering?
Check the complete part number, hardware revision, included I/O module, condition, rack compatibility, and available functional-test records. For used or refurbished equipment, request clear label photographs and test documentation.
Q7: Is the 161204-01 interchangeable with the 3500/91M gateway?
Do not assume interchangeability. The 3500/91M belongs to a related gateway family, but compatibility must be established from the relevant hardware documentation, revision, and configuration requirements.
