The GE UR9EH is a high-performance digital input/output module specifically designed for the General Electric Multilin Universal Relay (UR) platform. This module is a critical component for power system protection and substation automation, providing the high-density contact inputs and outputs necessary for complex protection logic, control sequences, and status monitoring within the UR chassis (such as the C60, G60, or D60 relays).
For availability, lead times, or technical documentation for this specific hardware revision, please visit our UR9EH contact page.
Technical Description and Parameters
The UR9EH is engineered to meet the stringent requirements of utility-grade environments, offering enhanced isolation and high-density signal processing. It allows for a higher concentration of I/O points per slot compared to standard modules.
- Module Type: High-Density Digital I/O Module
- Series: GE Multilin Universal Relay (UR)
- Input Channels: Multiple high-voltage DC digital inputs (typically 125V or 250V DC)
- Output Channels: Fast-acting mechanical relay outputs (Form-A or Form-C)
- Sampling Rate: High-speed scanning for millisecond-accurate event capture
- Communication: Internal Tri-Bus communication with the CPU module
- Environmental: Fully compliant with IEEE C37.90 and IEC 60255 protection standards
Product Datasheet Specifications
- Dimensions: Standard UR series vertical module width (plugs into rear-facing chassis slots)
- Weight: 0.92 kg (2.03 lbs)
- Country of Origin: Canada / USA
- Mounting: Vertical slot-in for GE Multilin UR Chassis (e.g., 19-inch rack format)
- Operating Temperature: -40°C to +85°C
- Isolation: 2 kV AC dielectric withstand for 1 minute
Application Fields
The UR9EH is primarily deployed in high-voltage power system protection and industrial control:
- Substation Automation: Monitoring breaker auxiliary contacts and issuing trip/close commands across multiple bays.
- Busbar Protection: Fast-acting I/O for clearing faults in complex substation configurations.
- Generator Control: Managing digital signals for cooling systems, excitation interlocks, and lockout relay signals.
- Industrial Load Shedding: Executing rapid disconnection sequences to maintain grid stability during frequency or voltage drops.
Product Instructions for Use
- Installation: Power off the UR chassis before module insertion. Slide the UR9EH into the designated slot and secure it with the top and bottom thumb screws to ensure proper grounding and mechanical stability.
- Field Wiring: Use high-quality ring or spade terminals for connections to the rear terminal block. Ensure that the polarity of the DC wetting voltage matches the input circuit requirements as specified on the module label.
- Configuration: Use GE EnerVista UR Setup software to assign the digital inputs and outputs to specific FlexLogic variables within the relay’s internal logic.
- Testing: Perform a “Contact Test” or “Loopback Test” using the relay’s front panel HMI or the software to verify that each output relay and input channel is functioning correctly before commissioning.
Q&A: Frequently Asked Questions
Q: Can I use the UR9EH in any slot of the UR chassis? A: Most UR I/O modules can be used in slots F through M, but you must verify the specific hardware configuration and CPU limits of your relay model to ensure the total I/O power consumption is within limits.
Q: What is the benefit of the UR9EH over standard UR I/O modules? A: The UR9EH provides a higher density of points per module, allowing for more comprehensive monitoring and control in a single 19-inch chassis, which is ideal for complex bay controller applications.
Q: Is the UR9EH compatible with older firmware versions? A: Hardware revisions like the UR9EH may require a minimum firmware version for the CPU module to recognize and communicate with the I/O correctly. Always check the GE compatibility matrix.
Related Product News
GE Vernova has reinforced the lifecycle of the Multilin UR series, including the UR9EH, as part of their 2026 Grid Resiliency initiative. Recent technical updates focus on “Virtual Test” capabilities, allowing engineers to simulate I/O transitions on the UR9EH logic without physically operating the field contacts. This significantly reduces commissioning times for new substation builds. Additionally, the latest manufacturing standards for the UR9EH include enhanced conformal coating options, improving resistance to harsh atmospheric conditions in coastal and industrial processing environments.
