Product Description
The GE Multilin UR4LA is an advanced Digital I/O Module designed for the Universal Relay (UR) series. It delivers reliable performance for utility and industrial power systems, providing eight optically isolated digital inputs and four high-speed Form A output contacts. This module ensures precise monitoring and control, enabling protection, automation, and alarm systems to operate efficiently. In addition, its modular and hot-swappable design allows seamless integration and maintenance without interrupting relay operations.
Key Features
- Expanded I/O Capability: Adds 8 digital inputs and 4 fast output contacts to UR relays.
- High-Speed Output: Outputs respond rapidly, ideal for tripping and protective actions.
- Optical Isolation: Ensures robust signal separation and reduces electrical noise interference.
- Hot-Swappable Design: Enables replacement without downtime, enhancing system availability.
- Durable Contact Rating: Supports heavy-duty switching with over 100,000 operational cycles.
Technical Specifications
- Digital Inputs: 8 optically isolated channels
- Input Voltage Range: 48 VDC nominal (30–60 VDC acceptable)
- Input Current: ~5 mA at 48 VDC
- Digital Outputs: 4 Form A (normally open) contacts
- Output Contact Rating: 250 VAC / 220 VDC, 8 A continuous
- Contact Life: >100,000 operations at full load
- Response Time: High-speed operation suitable for protection/control
- Design: Hot-swappable, modular
- Weight: 0.6 kg
Typical Applications
The UR4LA module integrates seamlessly with GE Multilin UR relays in substations, power plants, and industrial automation systems. It facilitates monitoring of circuit breakers, transformers, and other critical equipment. Moreover, the module supports tripping, alarms, and automated control sequences for improved safety and operational efficiency. For instance, it can manage emergency shutdowns or trigger protective relays during fault conditions.
FAQ
Q: Can the UR4LA module be replaced while the relay is operating? A: Yes, the module supports hot-swapping, so you can replace it without shutting down the relay.
Q: What type of outputs does the UR4LA provide? A: It provides 4 Form A (normally open) high-speed contacts suitable for control and protection.
Q: What is the maximum contact current rating? A: Each output contact can handle up to 8 A continuous at 250 VAC or 220 VDC.
Q: Are the digital inputs optically isolated? A: Yes, all 8 inputs are optically isolated to ensure reliable operation and noise immunity.
