GE UR6EV Digital I O Expansion Module (8 Isolated DI + 4 Form-A Relay DO) For Multilin UR Series Protection Relays

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    • Product Code: UR6EV
    • Availability: In Stock
    GE UR6EV Digital I/O Expansion Module (8 Isolated DI + 4 Form-A Relay DO) For Multilin UR Series Protection Relays
    Manufacturer: GE Multilin (GE Grid Solutions)
    Model: UR6EV
    Compatible Host: All UR universal protection relays (UR30, UR50, UR70, UR80, UR90 feeder/generator/transformer relays)
    Type: Plug-in internal I/O daughter card, 8 opto-isolated digital inputs + 4 SPST Form-A relay outputs, circuit wire-break monitoring
    Core Function: Collect breaker/disconnector dry contact status, fault trip feedback; drive alarm lights, trip/auxiliary interlock coils; high-precision timestamp event logging, per-channel open/short circuit diagnosis, expand point capacity of main protection relay; support IEC61850 GOOSE, Modbus TCP via main relay Ethernet
    1. Product Overview
    UR6EV is a high-density digital I/O expansion card for GE UR series multifunction protection relays, installed inside the relay chassis via internal backplane slot, powered by the main unit’s 24VDC backplane bus. Compared with UR6PH (4DI+6DO), UR6EV prioritizes more digital input channels (8DI) for massive switchgear status monitoring, matched with 4 relay outputs for auxiliary control and alarm signals. All DI channels adopt optocoupler galvanic isolation with RC noise filter (10~20ms filter time constant) to eliminate substation EMI interference. Unique wire-break monitoring function for both input and output loops: the module continuously detects open circuit, short circuit and overload faults of each channel, records fault events with millisecond timestamps and uploads to the relay HMI and SCADA system. All relay outputs are industrial Form-A contacts with high load capacity, directly driving alarm horns, fault indicators and auxiliary interlock circuits without intermediate relays. The module integrates full surge & ESD protection, wide temperature industrial hardware, suitable for high electromagnetic interference environments of power plants, substations and petrochemical power distribution rooms. GE has stopped mass production, only surplus new stock and refurbished spare parts are available in aftermarket.
    2. Complete Technical Specifications
    • Channel Configuration: 8 opto-isolated Digital Input (DI), 4 Form-A SPST Relay Digital Output (DO)
    • DI Input Type: Dry contact / wet contact 24–240 VAC/DC, nominal input current 6mA per channel
    • Relay Contact Rating: Max 6A @ 250VAC resistive load per output channel
    • Galvanic Isolation: 2000VAC rms isolation between field circuit and relay internal logic, per-channel independent opto-isolation
    • Filter Circuit: RC low-pass filter on each DI channel, 10~20ms configurable debounce time
    • Diagnostic Functions: Per-channel open circuit, short circuit, overload, coil fault detection; wire-break monitoring for all I/O loops; millisecond-level event timestamp logging
    • Surge & ESD Protection: ±15kV contact ESD, 2kV line surge suppression on all field terminals
    • Power Supply: Derived from UR main relay internal 24VDC backplane, max power consumption 9W
    • Operating Temperature: -20℃ ~ +70℃ substation cabinet with ventilation
    • Storage Temperature: -40℃ ~ +85℃
    • Humidity: 5% ~ 95% RH non-condensing
    • Mechanical Form: Standard single-slot plug-in card inside UR relay chassis, IP20 protection grade
    • Weight: ~0.64kg
    • Certifications: IEC60255 relay standard, CE, UL industrial safety certification
    3. Hardware Structure Composition
    1. 8-channel optocoupler isolation DI acquisition circuit with RC anti-jamming filter
    2. 4 groups of industrial Form-A safety relays with independent drive circuits and load monitoring
    3. Internal high-speed backplane bus interface for data exchange with main relay CPU
    4. Front panel multi-color LED indicators: RUN, FAULT, DI status, relay actuate status per channel
    5. Built-in fault detection ASIC for real-time wire-break and overload monitoring of each I/O loop
    4. UR6EV vs UR6PH Core Difference
    • UR6EV: 8DI + 4DO, suitable for massive switch position signal collection scenarios
    • UR6PH: 4DI + 6DO, suitable for multi-trip coil, multi-alarm control output scenarios
    • Same platform, same isolation & diagnostic performance, only channel quantity allocation differs
    5. Core Power Industry Application Scenarios
    • Thermal power plant generator/transformer protection cabinet: breaker, earthing switch, auxiliary equipment multi-point status collection
    • Petrochemical substation feeder protection: multiple disconnect switch position monitoring, fault alarm light & horn control
    • Hydropower station unit protection system: interlock contact signal acquisition, auxiliary trip loop output
    • Urban distribution intelligent substation UR relay point capacity expansion, massive switchgear status monitoring
    GE Grid Solutions © UR6EV 8DI+4DO Digital I/O Expansion Module For UR Series Protection Relays


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