GE Multilin UR6AV Digital I/O Expansion Module

The GE UR6AV is a plug‑in digital I/O expansion module for GE Multilin UR‑series universal protection relays. It extends the relay’s input‑output capacity to collect breaker, disconnect switch and auxiliary equipment contact status, and outputs relay control commands for substation automation interlock and signal‑annunciation functions, expanding peripheral signal access capability of UR‑family protection devices.

This hot‑swappable modular card plugs directly into UR relay chassis backplane bus, provides electrical isolation for field signals, and supports hardware channel self‑diagnosis. Original production has been discontinued. It is widely supplied as aftermarket spare parts for utility substation, petrochemical plant power‑room protection cabinet maintenance and automation‑system retrofitting projects.

Main Specifications

1. Brand:GE; Model:UR6AV; Type:Multilin UR‑Series Digital I/O Expansion Module
2. Hardware Configuration:8 channels digital inputs, multi‑channel relay output contacts for status and control signals
3. Bus Interface:Direct plug‑in connection to UR relay internal backplane bus
4. Isolation Performance:High‑voltage electrical isolation between field side and internal relay circuit
5. Diagnostic Feature:Per‑channel hardware self‑diagnosis, LED status indicators for input‑output channel state
6. Environmental Range:Operating temperature range ‑40℃ ~ +85℃ for substation cabinet operating environments
7. Supply Status:Original production discontinued, available as tested surplus or refurbished spare parts

Core Functions

1. Acquire contact status signals from circuit breakers, disconnectors and field auxiliary devices and transmit status data to main UR relay CPU.
2. Receive control logic commands from main relay and output dry‑contact relay signals to drive external interlock and alarm annunciator equipment.
3. Provide electrical isolation between field wiring and protection relay internal circuits to suppress substation electromagnetic interference impact.
4. Support hot‑swap replacement within compatible UR chassis to reduce equipment downtime during module maintenance and replacement.
5. Detect input‑output channel hardware faults, report diagnostic status to main relay and display working state via on‑board LED indicators.
6. Serve as key signal‑expansion hardware for GE Multilin UR‑series protection and control relays inside substation automation cabinets.

Application Scenarios

1. Power‑utility substations, petrochemical plants, metallurgical enterprises and other power‑system automation sites equipped with UR‑series protection relays.
2. Spare I/O expansion module replacement and routine maintenance of existing GE Multilin UR‑family protection cabinets.
3. Technical renovation and signal‑channel capacity upgrade of aging substation protection‑control automation systems.
4. On‑site troubleshooting and replacement of faulty expansion modules on continuously operating power‑supply protection units.
5. Spare‑parts stocking for system integrators and power‑system professional maintenance contractors.
6. Global aftermarket spare supply for technicians maintaining obsolete GE Multilin UR‑series legacy protection hardware.

FAQ

1. Q:Can UR6AV run independently without UR‑series main relay?
   A:It is an expansion accessory module, must be installed inside matched Multilin UR relay chassis and cannot operate as standalone device.
2. Q:What happens when UR6AV module fails?
   A:Loss of corresponding digital input‑output channels, missing breaker status signals and failure to execute external interlock control commands may occur.

3. Q:Is this GE digital I/O expansion module still in original production?
   A:GE original manufacturing has been discontinued, only tested surplus and refurbished spare units are available.