The Bently Nevada 3500/91-01-CN (3500/91) is a high-performance Ethernet Global Data (EGD) Communication Gateway Module designed specifically for the 3500 Machinery Protection System. This module provides a deterministic, high-speed interface to GE Mark VI and Mark VIe turbine control systems. Unlike standard Modbus gateways, the 3500/91 utilizes the EGD protocol to ensure that machinery protection data, such as vibration levels and alarm statuses, are delivered with the precise timing required for turbine control loops. The 3500/91-01-CN configuration includes the specific "CN" agency approvals, making it compliant for mission-critical installations in regulated industrial environments.
The following technical specifications detail the hardware and communication capabilities of the 3500/91-01-CN (3500/91):
| Parameter | Specification Details |
| Model Number | 3500/91-01-CN (3500/91) |
| Main Module Type | 01 = EGD Communication Gateway |
| Protocol Supported | Ethernet Global Data (EGD) |
| Ethernet Port | 1 × 10/100 Mbps RJ45 |
| Update Rate | Deterministic (Configurable 10 ms to 100 ms) |
| Power Consumption | 7.4 Watts (Nominal) |
| Data Types | Alarms, Channel Values, System Status, Event Logs |
| Security | Read-Only EGD access to protect rack configuration |
| Agency Approvals | CN = Country Specific (China/International Compliance) |
| Operating Temp | -30 °C to +65 °C (-22 °F to +149 °F) |
| Physical Weight | 0.79 kg ( 1.74 lbs) |
| Dimensions | 24.1 cm x 3.8 cm x 24.1 cm |
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