Overview
Suffix Breakdown & Model Matrix
| Parameter | Specification |
|---|---|
| Base Model | 3500/91 |
| Full Model | 3500/91-01-02-00 |
| Main Module Type | EGD Communication Gateway Module |
| I/O Module Type | Ethernet 100BASE-FX Fiber Optic I/O Module |
| Agency Approval Option | None |
| EGD Version | Version 2.01 |
| Network Protocol | Ethernet UDP/IP |
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 3500/91-01-02-00 |
| Brand | Bently Nevada |
| Origin | Not specified in supplied data |
| Main Module Weight | 0.79 kg |
| I/O Module Weight | 0.39 kg |
| Main Module Dimensions | 241.3 mm x 24.4 mm x 241.8 mm |
| I/O Module Dimensions | 241.3 mm x 24.4 mm x 99.1 mm |
| Operating Temp | -30 deg C to +65 deg C |
| Storage Temperature | -40 deg C to +85 deg C |
| Humidity | 95%, non-condensing |
| Power Consumption | 7.4 W typical |
| Main Module Rack Space | 1 full-height front slot |
| I/O Module Rack Space | 1 full-height rear slot |
| Ethernet Interface | 100BASE-FX fiber optic |
| Communication Protocol | EGD version 2.01, Ethernet UDP/IP |
| Producer Exchanges | Rack, module, channel status, floating-point data, floating-point setpoints |
| Consumer Exchanges | Configuration and control data |
| Front Panel OK LED | Indicates proper module operation |
| Front Panel TX/RX LED | Indicates communication activity |
| Agency Approval | None |
Machinery Monitoring Data Communication
The 3500/91 transfers data generated by the 3500 Machinery Protection System through an EGD communication path. Therefore, external systems can receive rack status, module status, channel status, monitored values, and floating-point setpoints.
The gateway communicates through a rear 100BASE-FX fiber optic I/O module. This configuration separates the network interface from the front-mounted gateway electronics while maintaining the required 3500 rack installation arrangement.
For machinery monitoring applications, the gateway transports measurement data generated by the 3500 system. It does not replace the sensing or signal-conditioning functions performed by dedicated 3500 monitoring modules. Consequently, parameters such as eddy-current probe scaling and gap-voltage validation remain functions of the associated monitoring channels rather than the EGD gateway itself.
The communication architecture also supports consumer exchanges for configuration and control data. As a result, compatible external controllers can exchange defined data with the 3500 rack through the EGD protocol.
Frequently Asked Questions
Q: Which Ethernet interface does the 3500/91-01-02-00 use?
A: The module uses a 100BASE-FX fiber optic Ethernet interface through its rear I/O module.
Q: What type of data can the gateway produce?
A: Producer exchanges include rack status, module status, channel status, floating-point data values, and floating-point setpoints.
Q: Does the 3500/91 directly perform eddy-current probe scaling?
A: No. The supplied specifications identify the 3500/91 as a communication gateway. Eddy-current signal processing and probe scaling remain associated with the applicable 3500 monitoring hardware.
Field Installation Guidelines
- Install the main gateway module in one full-height front slot of the compatible 3500 rack.
- Install the associated 100BASE-FX I/O module in one full-height rear slot.
- Verify that the rack provides the required physical positions before installation.
- Route fiber optic communication cables separately from high-voltage power and high-current switching conductors where practical.
- Protect fiber optic cables from excessive bending, crushing, abrasion, and mechanical stress.
- Verify the Ethernet fiber interface and connected network equipment before commissioning.
- Confirm the OK LED after power-up to verify normal module operation.
- Check the TX/RX LED during communication testing to confirm network activity.
- Maintain appropriate cabinet grounding and bonding practices for the 3500 rack and associated control equipment.
- Verify operating conditions remain within the specified -30 deg C to +65 deg C temperature range and 95% non-condensing humidity limit.
- Confirm the external controller uses compatible EGD version 2.01 communication before exchanging configuration, status, or measurement data.
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