GE Multilin UR-9NH / UR9NH UR Series CPU Module

Description

The GE Multilin UR-9NH is a central processing unit module designed for the UR Series (Universal Relay) platform, acting as the core management, control, and computational processor for high-performance automation and protection devices like the T60 Transformer Protection System. This module handles severe protection algorithms, manages system logic via programmed algorithms, and drives interfaces between field variables and network devices.

The UR-9NH provides comprehensive processing and digital communication capabilities. On its integrated communications interface, it is equipped with a dual setup featuring an RS485 port alongside a high-speed 10/100Base-T Ethernet interface. This network assembly accommodates multiple key utility automation protocols, including Modbus TCP/IP and DNP 3.0, allowing efficient integration into industrial SCADA and modern substation communication architectures. Additionally, this specific module variant comes equipped with a wide-range, substation-hardened 125 / 250 V AC/DC power supply integrated into the hardware group. Constructed as part of GE Multilin's version 4.0x or higher hardware refreshes, it features a blue label on the faceplate to facilitate accurate field deployment and prevent hardware version mismatching across legacy systems.

Features

• Advanced Central Processing: Drives the complete central logic execution, protection routines, and diagnostic procedures for compatible UR series relay chassis.
• Versatile Connectivity: Equipped with a serial RS485 port combined with a 10/100Base-T Ethernet connector to facilitate high-speed industrial data communication.
• Integrated Power Supply: Built with a high-voltage 125 / 250 V AC/DC primary power module embedded directly on the assembly.
• EnerVista Software Compatibility: Interfaces seamlessly with EnerVista software tools for configuration, backup, tracing, and parameter setup via standard network links.
• Distinct Visual Identification: Uses a vivid blue identification label to represent compatibility with modern high-speed DSP and CT/VT diagnostic cards.

Applications

• Substation Grid Protection: Serves as the high-speed logic and processing core in systems like the B30 or T60 Transformer Protection System within power utility generation or transmission environments.
• Substation SCADA Integration: Bridges field-level measurements and control indicators to network master stations over 10/100Base-T Ethernet or RS485 via Modbus or DNP 3.0 lines.
• Industrial Plant Automation: Deployed in demanding power plant, mining, or manufacturing facilities requiring a robust central relay controller powered by standard 125 / 250 V AC/DC station grids.

Technical Specifications

Installation Guidelines

• Control Power Safety: Module withdrawal or insertion must only be initiated when the main control power feeding the relay chassis has been entirely isolated and verified dead.
• Electrostatic Grounding: Technicians must utilize an approved electrostatic discharge (ESD) prevention wrist strap when touching internal cards or chassis parts to prevent electrostatic shock damage.
• Hardware Label Validation: Verify the visual blue label on the CPU matches the blue label configuration of existing CT/VT or DSP components. Inserting mismatched cards across legacy tiers halts the device and generates a "DSP ERROR" or "HARDWARE MISMATCH" code.
• Cable Disconnection: Unplug the 10/100Base-T Ethernet cable from the front/rear ports of the module before loosening mounting screws or attempting card withdrawal from the internal backplane.
• Module Seating: Align the card along the designated enclosure tracks, slide carefully until fully locked into the backplane, and secure the top/bottom ejector clips into place.