GE Multilin UR Series UR9NH CPU Module

Product Overview

The GE UR-9NH is a CPU Module from GE Multilin, designed for the UR Series Universal Relay platform. This module features a high-performance 32-bit processor with RS485 and 10/100Base-T Ethernet communication interfaces, making it suitable for a wide range of protection and control applications. The UR-9NH is designated by the order code "9N", representing a newer CPU design in the UR family.

Important Note: GE Grid Solutions has discontinued the manufacture of UR Version 6 CPU modules (including order codes E, J, K, and N) as of December 31, 2022. The UR-9NH has been superseded by Version 7 CPU modules (UR9T, UR9U, UR9V, UR9W). Please verify availability and consider upgrade paths when ordering.

Key Features

• High-performance 32-bit CPU for complex protection algorithms
• RS485 port for serial communication
• 10/100Base-T Ethernet port for high-speed network connectivity
• Multiple protocol support: Modbus RTU/TCP, DNP3, IEC 61850
• Wide input voltage range: 24/48/110/125 VDC or 120/240 VAC
• Plug & Play functionality for simplified installation
• Ground surge connection not required
• Compatible with EnerVista UR Setup Software

Technical Specifications

Applications

• Generator protection and management
• Transformer protection schemes
• Line differential and feeder protection
• Motor protection and control
• Substation automation and SCADA integration
• Industrial power system protection

Compatibility

The UR-9NH is fully compatible with the GE Multilin UR Series universal relay family. As a Version 6 CPU, it must be paired with newer CT/VT modules to avoid hardware mismatch errors. For new installations, GE recommends Version 7 CPU modules (UR9T, UR9U, UR9V, UR9W) with firmware 7.28 or higher.

Installation Guide

1. Power Down: Completely de-energize the UR relay chassis. Never install or remove modules while energized.
2. ESD Protection: Wear a grounded ESD wrist strap before handling the CPU module.
3. Slot Verification: Confirm the CPU slot position per the relay manual.
4. Module Insertion: Slide the UR-9NH into the designated CPU slot, aligning the rear connector with the backplane.
5. Secure Mounting: Tighten the faceplate retention screws.
6. Configuration: Power on and configure via EnerVista UR Setup software. The CPU automatically reads configuration data from each module.

FAQ

Q: What does the "9N" order code signify?
A: The "9N" designates a Version 6 CPU module with RS485 + 10/100Base-T Ethernet communication capabilities.

Q: Is the UR-9NH still available for purchase?
A: GE discontinued Version 6 CPUs on December 31, 2022. Limited stock may be available through distributors. For new systems, consider Version 7 CPUs (UR9T, UR9U, UR9V, UR9W).

Q: What are the replacement options for UR-9NH?
A: GE recommends Version 7 CPU modules as replacements. Refer to the GE Grid Solutions website for specific cross-reference information.

Q: Is the UR-9NH compatible with older CT/VT modules?
A: No. The UR-9NH must be paired with newer CT/VT modules. Pairing with old CT/VT modules will result in hardware mismatch errors.

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