GE UR6TH Digital I O Expansion Module (8 Isolated DI + 4 Form-A Relay DO) For Multilin UR Series Protection Relays
- Product Code: UR6TH
- Availability: In Stock
GE UR6TH Digital I/O Expansion Module (8 Isolated DI + 4 Form-A Relay DO) For Multilin UR Series Protection Relays
Manufacturer: GE Multilin (GE Vernova Grid Solutions)
Model: UR6TH
Compatible Host: All UR universal protection relays (UR30, UR50, UR70, UR80, UR90 feeder/transformer/generator relays)
Type: Internal plug-in digital I/O daughter card, 8 opto-isolated digital inputs + 4 SPST Form-A relay outputs, wire-break loop monitoring
Core Function: Collect breaker/disconnector dry contact status, fault trip feedback signals; drive alarm lights, auxiliary interlock & trip coils; millisecond accurate timestamp event recording, per-channel open/short circuit diagnosis; expand point capacity of main protection relay, support IEC61850 GOOSE, Modbus TCP via main relay Ethernet port
1. Product Overview
UR6TH is a high-density digital switch I/O expansion daughter card for GE UR series multifunction protection relays, installed inside relay chassis via internal backplane slot, powered by the main unit’s 24VDC backplane bus.
Channel layout: 8 opto-coupler isolated digital inputs for massive switchgear status monitoring, paired with 4 industrial Form-A relay outputs for auxiliary control and fault alarm signals. Every DI channel integrates RC low-pass noise filter with configurable 10~20ms debounce time to suppress substation EMI interference.
Built-in full loop wire-break detection for both input and output circuits: continuously detect open circuit, short circuit and overload faults, record fault events with millisecond timestamps and upload to relay HMI and SCADA system.
Form-A relay contacts support high resistive load, directly driving alarm horns, fault indicators and auxiliary interlock loops without intermediate relays. Complete surge & ESD protection, wide-temperature industrial hardware, suitable for high electromagnetic interference environments of power plants, substations and petrochemical power distribution rooms. GE has discontinued mass production, only surplus new stock and refurbished spare parts available in aftermarket.
UR6TH shares identical hardware channel specifications and performance parameters with UR6EV (8DI+4DO), only differs in internal component batch code naming; differs from UR6PH (4DI+6DO) which prioritizes more relay output channels for multi-trip coil control scenarios.
2. Complete Technical Specifications
• Channel Configuration: 8 opto-isolated Digital Input (DI), 4 Form-A SPST Relay Digital Output (DO)
• DI Input Signal: Dry contact / wet contact 24–250 VAC/DC, nominal input current 6mA per channel
• Relay Contact Rating: Max 6A @ 250VAC resistive load per output channel
• Galvanic Isolation: 2000VAC rms channel-to-logic isolation, independent optocoupler per DI channel
• Anti-jamming Filter: RC low-pass filter on each DI, configurable 10~20ms debounce time
• Diagnostic Functions: Per-channel open circuit, short circuit, overload, coil fault detection; full loop wire-break monitoring; 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: -40℃ ~ +70℃ ventilated substation cabinet
• Storage Temperature: -40℃ ~ +85℃
• Humidity: 5% ~ 95% RH non-condensing
• Mechanical Form: Single-slot internal plug-in card for UR relay chassis, IP20 protection grade
• Weight: ~1.2kg
• Certifications: IEC60255 protection relay standard, CE, UL industrial safety certification
3. Hardware Structure Composition
1. 8-channel optocoupler isolation DI acquisition circuit with RC anti-noise filter
2. 4 groups of industrial Form-A safety relays with independent drive circuits and load monitoring
3. High-speed internal 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. Dedicated fault detection ASIC for real-time wire-break and overload monitoring of each I/O loop
4. UR6TH / UR6EV / UR6PH / UR8FV Core Distinction
• UR6TH / UR6EV: 8DI + 4DO digital I/O card, high input density for massive switch status collection
• UR6PH: 4DI + 6DO digital I/O card, high output density for multi-trip coil & multi-alarm control
• UR8FV: CT/VT analog sampling module, collect current/voltage analog signals for protection algorithm calculation
• All modules plug into UR relay internal slots, fully complementary and interchangeable according to site signal demands
5. Core Power Industry Application Scenarios
• Thermal power plant generator & transformer protection cabinet: multi-point breaker, earthing switch, auxiliary equipment status collection
• Petrochemical substation feeder protection: multiple disconnector position monitoring, fault alarm horn & indicator light control
• Hydropower unit protection system: interlock contact signal acquisition, auxiliary trip loop output
• Urban distribution intelligent substation UR relay I/O capacity expansion, mass switchgear state monitoring
GE Vernova © UR6TH 8DI+4DO Digital I/O Expansion Module For UR Series Protection Relays