GE Fanuc UR8LH - Universal Relay Module with 8 Poles, Low Coil Power, High Current Switching

GE Fanuc UR8LH – Universal Relay Module with 8 Poles, Low Coil Power, High Current Switching

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Product Introduction:
The UR8LH is an energy-efficient universal relay module for GE Fanuc PLC systems. The “UR” stands for Universal Relay, “8” indicates eight relay poles, “L” denotes Low coil power consumption, and “H” indicates High Current switching capability. This module is designed for applications where the control system has limited power supply capacity, but the field loads still require high current switching. The low coil power design uses high-efficiency coils that draw only 0.5 Watts per relay (compared to 1.5 Watts for standard modules), reducing the total module power consumption by 60 percent. Despite the low coil power, the contacts still switch 10 Amps per pole, making it ideal for large systems with many relays where power budget is a concern.

Technical Specifications:
Board Type: Universal Relay Output Module (UR)
Pole Count: 8 independent relay poles
Coil Configuration: Common return (shared return terminal)
Coil Power: 0.5 Watts per relay (4 Watts total for 8 relays, Low Power)
Contact Current Rating: 10 Amps per pole at 250V AC (High Current)
Voltage Rating: 250V AC, 125V DC, 30V DC
Coil Voltage: 24V DC, 48V DC, 120V DC (common return)
Contact Type: Silver alloy with gold flash
Response Time: 12ms energize, 6ms de-energize (slightly slower due to low-power coil)
Mechanical Life: 10 million operations
Electrical Life: 500,000 operations at full load
Isolation: 500V RMS channel-to-channel
LED Indicators: 8 green coil LEDs, 8 red contact LEDs
Total Module Power: Approximately 8 Watts (all 8 coils energized, versus 12W for standard)
Form Factor: 3U Eurocard
Operating Temperature: 0 to 60 degrees Celsius

Functional Features:
Ultra-Low Coil Power: 0.5 Watts per relay reduces total power consumption by 60 percent, critical for large systems with hundreds of relays.
High Current Switching: Maintains 10 Amp contact rating despite the low-power coil design.
Efficient Coil Design: Uses high-permeability core materials and optimized windings to maximize magnetic force with minimal power.
Common Return Wiring: Shared return terminal simplifies installation.
Reduced Heat Generation: Lower coil power means less heat dissipated in the control rack, improving reliability.
Smaller Power Supply Requirements: Systems with many UR8LH modules need smaller power supplies, reducing capital cost.

Application Scenarios:
Large I/O Racks: Used in racks with 64 or 128 relay points where total coil power would exceed the power supply capacity with standard modules.
Battery-Backed Systems: Reduces battery drain in UPS-backed control systems during power outages.
Solar and Wind Power: Minimizes power consumption in remote renewable energy installations with limited power budgets.
Retrofit Projects: Replaces older high-power relay modules in existing racks without upgrading the power supply.

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