GE UR Series Modules UR6FH Digital I/O Module

Technical Dossier

Product Details And Specifications

GE UR Series Technical Notes

The GE UR (Universal Relay) Series, developed by GE Grid Solutions (formerly GE Multilin), is one of the most widely deployed protection relay platforms in global heavy industry. Installed across chemical processing plants, nuclear power stations, petroleum refineries, hydroelectric facilities, and high-voltage transmission substations, the UR platform provides a standardized, modular architecture for generator protection, transformer protection, line protection, bus protection, and motor protection applications. Its chassis-based, slot-configurable design allows end users to build application-specific relay configurations from a common hardware library, reducing spare parts inventory complexity across multi-unit installations. The UR Series is recognized under IEC 61850 GOOSE messaging standards and supports legacy SCADA integration via DNP3, Modbus RTU, and IEC 60870-5-104 protocols, making it a long-term fixture in both greenfield and brownfield substation environments.

UR Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly deployed modules within the GE UR Series platform, organized by functional category:

Digital I/O Modules

• UR6FH: 24-channel digital I/O module; configurable contact inputs and output relays for protection logic interfacing.
• UR6GH: High-density digital output module; 16 Form-A output relays rated for high-current switching applications.
• UR6EH: Digital input module; 24 optically isolated contact inputs, 24 VDC/125 VDC wet/dry contact compatible.
• UR6DH: Mixed digital I/O module; 16 contact inputs and 8 Form-C output relays for general protection tripping circuits.

Analog I/O & Transducer Modules

• UR6AH: Analog input module; 4-channel, 4–20 mA / 0–10 V transducer input for RTD and thermocouple monitoring.
• UR6BH: CT/VT analog input module; 8 current transformer and 4 voltage transformer inputs for metering-class accuracy.
• UR6CH: High-accuracy analog module; 16-bit ADC resolution, used in differential protection and power quality applications.

CPU & Processing Modules

• UR9FH: Main CPU module; dual-core processor, 512 MB RAM, hosts UR firmware and IED logic engine.
• UR9GH: Redundant CPU module; hot-standby configuration for critical protection applications requiring no single point of failure.
• UR9EH: Legacy CPU module; single-core, compatible with UR firmware versions 4.x through 6.x.

Communication & Network Modules

• UR7FH: IEC 61850 communication module; dual Ethernet ports, GOOSE publisher/subscriber, MMS server.
• UR7GH: Multi-protocol communication module; DNP3, Modbus TCP/RTU, IEC 60870-5-104 simultaneous support.
• UR7EH: Fiber optic communication module; ST-connector, 820 nm multimode, for electrically noisy substation environments.
• UR7DH: IEEE 1588 PTP grandmaster-capable time synchronization module; IRIG-B and PPS output.

Power Supply Modules

• UR8FH: DC power supply module; 125/250 VDC input, 5 VDC / 12 VDC regulated output for chassis backplane.
• UR8GH: AC/DC universal power supply module; 85–264 VAC / 88–300 VDC wide-range input, redundant output capable.
• UR8EH: Redundant power supply module; hot-swap capable, used in N+1 power redundancy configurations.