GE UR-RHH Industrial Network Interface for UR Series Systems

GE UR-RHH: Industrial Data Link and Smart Factory Connectivity for UR Series Systems

The GE UR-RHH is a high-reliability power supply module engineered for the GE UR Series Universal Relay platform — one of the most widely deployed protection and control architectures in modern power substations and industrial automation environments. As smart factories and intelligent grid systems demand tighter integration between field devices, protection relays, SCADA platforms, and enterprise-level monitoring systems, the UR-RHH plays a foundational role in sustaining the uninterrupted power and communication backbone that keeps critical data flowing across every layer of the industrial network.

In today’s industrial connectivity landscape, a stable and protocol-compatible power supply is not merely a hardware component — it is the anchor of the entire data chain. From signal acquisition at the field device level to real-time transmission across Ethernet-based industrial networks, the UR-RHH ensures that the UR Series relay chassis maintains continuous operation, enabling seamless data exchange between protection relays, remote I/O modules, HMI terminals, PLC controllers, and SCADA gateways without interruption.

Network Communication Table

Connected Automation Data Flow

The UR-RHH operates at the heart of a layered industrial communication architecture. In a typical smart substation or industrial automation deployment, the data flow begins at the field device level — current transformers, voltage transformers, and digital sensors feed raw electrical signals into the UR Series relay chassis. The GE UR-8EH Ethernet communication module, installed within the same chassis, converts these protection events and measurement values into IEC 61850 GOOSE messages or DNP3 data packets, transmitting them upstream to the substation LAN.

At the network layer, managed industrial Ethernet switches aggregate traffic from multiple UR Series relays — including the GE D60 Line Distance Relay, the GE N60 Network Stability and Synchrophasor Relay, and the GE C60 Breaker Protection Relay — routing real-time protection data to the SCADA gateway. The SCADA system, often integrated with platforms such as GE’s own GridIQ or third-party systems via the GE UR-6CI communications interface module, aggregates event logs, fault records, and analog measurements for operator visualization on HMI terminals.

Remote I/O modules connected via Modbus TCP or IEC 60870-5-104 extend the data reach to remote terminal units (RTUs) at unmanned substations, where the GE UR-5MH module supports additional I/O mapping for alarm outputs and control inputs. Edge gateways bridge the substation LAN to the enterprise WAN, enabling remote diagnostics and predictive maintenance workflows. Variable frequency drives (VFDs) and motor protection relays — such as the GE 469 Motor Management Relay — also participate in this data ecosystem, reporting motor health data through the same Modbus or DNP3 communication backbone that the UR-RHH-powered chassis sustains.

The GE UR-8FI fiber-optic interface module further extends communication reach across electrically noisy industrial environments, ensuring that high-voltage interference does not corrupt the data stream between the relay chassis and the upstream SCADA or DCS platform. Throughout this entire chain — from signal acquisition to protocol conversion, network transmission, real-time monitoring, alarm feedback, and remote diagnostics — the UR-RHH provides the stable, conditioned power that every module in the chassis depends upon.

Solving Data Isolation in Industrial Sites

One of the most persistent challenges in industrial automation and power system management is data isolation — the condition where field devices, protection relays, and control systems operate on incompatible protocols, preventing unified visibility and centralized control. The GE UR Series platform, powered by modules like the UR-RHH, directly addresses this challenge by supporting a multi-protocol communication architecture that bridges legacy serial networks (Modbus RTU, DNP3 serial) with modern Ethernet-based systems (IEC 61850, DNP3/TCP, IEC 60870-5-104).

For industrial sites undergoing digital transformation, the UR-RHH-equipped relay chassis acts as a protocol gateway node — aggregating data from legacy field instruments and re-transmitting it in formats compatible with modern SCADA, MES, and cloud-based monitoring platforms. This eliminates the need for standalone protocol converters and reduces network complexity, while improving production line transparency and enabling real-time KPI tracking at the enterprise level.

System expansion is equally straightforward: the modular UR Series chassis architecture allows additional communication modules, I/O cards, and protection elements to be added without disrupting existing network topology. Remote diagnostics capabilities — enabled by the continuous, stable power delivery of the UR-RHH — allow maintenance engineers to access relay event logs, fault waveforms, and configuration parameters from any location on the network, reducing on-site intervention requirements and minimizing unplanned downtime.

Industrial Connectivity FAQ

Q1: Does the GE UR-RHH support real-time communication with SCADA systems?
Yes. The UR-RHH powers the UR Series relay chassis, which supports IEC 61850, DNP3, and Modbus TCP/RTU protocols — all widely used for real-time SCADA integration. Communication latency is typically within the millisecond range for GOOSE messaging under IEC 61850.

Q2: Is the UR-RHH compatible with both legacy serial and modern Ethernet network architectures?
Yes. The UR Series platform supports simultaneous multi-protocol operation. The UR-RHH-powered chassis can communicate via legacy serial protocols (DNP3 serial, Modbus RTU) and modern Ethernet protocols (IEC 61850, DNP3/TCP, IEC 60870-5-104) concurrently, making it suitable for hybrid network environments during phased digital upgrades.

Q3: How is network stability ensured in high-voltage industrial environments?
The UR-RHH is designed to operate reliably in electrically harsh substation and industrial environments. Combined with fiber-optic communication modules such as the GE UR-8FI, the system maintains network stability even in the presence of high electromagnetic interference (EMI), ensuring uninterrupted data transmission between field devices and control systems.

Q4: What warranty and pre-shipment testing does the UR-RHH come with?
Every GE UR-RHH unit supplied by ZYPLC is covered by a 12-month warranty and undergoes functional testing prior to shipment. This ensures that the module is verified for correct operation before it reaches your facility, reducing commissioning risk and supporting rapid system integration.

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