GE Multilin UR9TH Universal Relay CPU Module

The GE Multilin UR9TH, also cataloged as the UR9TH CPU Module, operates as a dedicated hardware component for high-performance protection, control, and communication within Universal Relay (UR) chassis systems.

Hardware Specifications

Industrial Control and Driver Integration

• Backplane Bus Communication Velocity: The 400 MHz processing engine executes high-speed logic solving for intricate generator, transformer, motor, breaker, and feeder protection schemes, pushing processed parameters directly to the UR backplane architecture.
• EtherNet/IP Deterministic Networks Alignment: While integrating into modern substation automation grids, the dual 10/100BASE-TX Ethernet interfaces deploy network redundancy via IEC 62439-3 PRP alongside IEEE 1588 time synchronization protocols to eliminate data packet jitter.
• Firmware Flash Compatibility: Onboard flash and RAM areas handle firmware structures, telemetry configurations, and historical event logs, maintaining systemic compatibility across the broader UR device family.

Frequently Asked Questions

Q: Does the physical design of the UR9TH support hot-swapping during active system operations? A: Yes. The module features a hot-swappable hardware design that allows engineering personnel to remove or replace the CPU component without de-energizing or shutting down the entire master relay system.

Q: How does this processing module manage network perimeter security and utility regulation compliance? A: The module incorporates built-in CyberSentry™ cybersecurity mechanisms. These dedicated internal security profiles align hardware access and network logging directly with NERC CIP compliance mandates.

Q: What specific serial communication interfaces are natively provided on the module housing? A: The physical connection layer includes one dedicated RS485 port and one RS232 port, running Modbus RTU or DNP3 serial protocols alongside the dual RJ45 Ethernet communication paths.

Field Installation Guidelines

• Chassis Card Guide Seating: Align the CPU board precisely within the designated card slots of the UR enclosure. Insert the module smoothly until the backplane interface connectors seal completely. Avoid twisting the assembly to prevent connector pin deflection.
• Low-Voltage Power Connections: Verify that the incoming auxiliary power feed matches the 18.5-36 V DC operational voltage specification before terminating wires at the input points to mitigate overvoltage component destruction.
• Substation Communication Shielding: Ground all Ethernet and serial cable shields at the dedicated master grounding busbar of the enclosure panel. Route communication networks away from primary phase lines and high-current buswork to prevent electromagnetic cross-talk.