GE Digital UR9VH – Ethernet/Serial Gateway Module

1. Product Brand, Model & Title

UR9VH

2. Executive Brief

The GE UR9VH is a highly specialized communications expansion card designed to operate within the GE UR Series relay platform (including models like the UR36, UR45, etc.). While it is often integrated into the rear case of an Intelligent Electronic Device (IED), the UR9VH functions essentially as a high-performance Station Controller or RTU. It provides substation-grade data concentration capabilities, bridging the gap between legacy serial devices and modern Ethernet-based substation automation systems. It supports industrial protocols like DNP3, Modbus TCP/IP, Modbus RTU, and IEC 61850, making it an ideal solution for SCADA integration, remote monitoring, and peer-to-peer inter-device communication in power generation and transmission facilities.

3. Core Technical Specifications

4. Key Features and Advantages

• Protocol Mediation: The UR9VH acts as a gateway, translating data from legacy serial meters/relays (via Modbus RTU) to modern Ethernet protocols (IEC 61850 or DNP3 TCP) for the control center.
• IEC 61850 Edition 2 Ready: Fully compliant with the latest IEC 61850 standards, supporting Sampled Values (SV) and Goose messaging, enabling seamless integration into digital substations.
• High-Availability Networking: Dual Ethernet ports support Redundancy (RSTP or PRP) to ensure zero single points of failure in critical communication paths.
• Precision Time Synchronization: Supports PTP (IEEE 1588) and IRIG-B to ensure that event recording and fault analysis across multiple devices are perfectly time-aligned.
• Cybersecurity Resilience: Equipped with robust security features (NERC CIP compliant) to prevent unauthorized access and ensure the integrity of SCADA communications.
• Scalable Integration: Can communicate with multiple downstream devices (up to 64+ logical clients) while simultaneously serving data to multiple upstream masters.

5. Application Scenarios

The UR9VH is primarily utilized in the Power & Energy sector for substation automation and feeder management:

• Digital Substations: Serves as the communication hub for IEDs, managing Sampled Values and Goose messaging for protection and control logic.
• Remote Terminal Unit (RTU): When installed in a relay panel, it aggregates data from various protection relays and sends it to the SCADA center via DNP3 or IEC 60870-5-104.
• Legacy Retrofit: Enables older electromechanical or first-generation digital relays (with serial ports) to communicate on a modern Ethernet LAN without the need for expensive external gateways.
• Wind & Solar Farms: Collects data from multiple inverters and feeder devices and concentrates the data for transmission to the operator’s control room.
• Data Concentrator: Acts as a gateway for power quality meters, collecting data via Modbus and serving it to a historian via Ethernet.

6. Brand Related Models

7. Frequently Asked Questions (FAQ)

Q1: Is the UR9VH a standalone device or does it require a host?
A: The UR9VH is an expansion module. Physically, it mounts into the rear case of a UR Series relay (like a UR-36). However, functionally, it operates with a high degree of autonomy and can be configured as a general-purpose gateway/RTU, almost independent of the protection functions of the host relay.

Q2: Can I use this to convert Modbus TCP to IEC 61850?
A: Yes. The UR9VH supports “Client” and “Server” modes on multiple protocols simultaneously. You can poll a Modbus TCP device and map that data into an IEC 61850 logical node to be served to a SCADA host.

Q3: Does it support fiber optic Ethernet connections?
A: This depends on the specific sub-part number. While the base module has RJ45 (copper) ports, variants with SFP cages or fixed SC/LC fiber connectors are available for long-distance substation communication (up to 10km).

Q4: How do I configure the DNP3 mapping?
A: Configuration is performed using GE EnerVista UR Setup Software. The software allows you to map internal logic points (analog values/digital statuses) to specific DNP3 indices (points), define classes, and set reporting intervals.

Q5: What is the advantage of using this over an external gateway?
A: Using the UR9VH eliminates the need for a separate rack, redundant power supplies, and external enclosure. It reduces panel footprint, wiring complexity, and overall cost by utilizing the existing protection relay’s power and casing.

*Note: Specifications may vary by firmware revision. Always refer to the official GE Multilin UR Series Communications Reference Manual (GEK-113638) for detailed wiring diagrams and configuration procedures.*