Key Technical Specifications

• Product Model: UR9EH
• Manufacturer: GE Multilin
• Function: Universal Relay CPU / Logic Processor
• Logic Engine: FlexLogic™ programmable logic
• Operating Temp: -40°C to +80°C
• Humidity: Up to 95% non-condensing at 55°C
• Communication: Ethernet, Modbus, DNP3, IEC 61850
• I/O Interface: Virtual I/O, Hardwired Contact I/O
• Analog Support: RTD, 4-20mA, Voltage inputs
• Mounting: Vertical or Horizontal (3/4 size)
• Certification: UL Listed, CE Marked
• Origin: Canada

 

Product Introduction

The GE UR9EH serves as the central processing unit for the Multilin UR series, handling protection logic, metering, and control for generators and transformers. It executes FlexLogic™ equations and manages virtual I/O signals without requiring external hardwiring for internal logic.Field engineers specify the UR9EH for its wide -40°C to +80°C operating range and deterministic processing speed. This module replaces older 9A/9C/9D CPUs but requires matching new-generation CT/VT modules to prevent DSP errors.

Installation & Configuration Guide

Preparation (10 min)

• Verify system power is OFF and locked out.
• Confirm CT/VT modules match the “New” CPU generation.
• Have Enervista UR Setup software ready.

Removal (5–10 min)

• Disconnect Ethernet and serial cables.
• Release the front panel locking mechanism.
• Slide the CPU module straight out.
• Inspect backplane pins for damage.

Installation (10 min)

• Align the UR9EH with the backplane guides.
• Slide in firmly until fully seated.
• Engage the front panel locking latch.
• Reconnect communication cables.

Power-On & Test (10 min)

• Apply control power.
• Watch for the “System OK” LED.
• Check Enervista for “DSP Error” or “Hardware Mismatch.”
• Verify FlexLogic™ equations are running.
• Test a virtual output via the HMI.

 

Troubleshooting Quick Reference

• DSP Error: CT/VT module generation mismatch. Verify 9E vs 9A hardware.
• No Display: Check 18.5-36 VDC supply at backplane.
• Comm Loss: Verify Ethernet port LED status and IP config.
• Logic Fail: FlexLogic™ scan time exceeded. Reduce equation complexity.
• High Temp: Ensure airflow is not blocked. Max ambient is 80°C.

Dimensions, Mounting & Wiring Notes

• Form Factor: 3/4 Size Universal Relay
• Mounting: Vertical or Horizontal orientation supported
• Backplane: Standard UR series backplane connector
• Wiring: No field wiring on CPU. Connect via backplane only.
• Cooling: Ensure 50mm clearance above/below for convection.

 

FAQ

Can I put a UR9EH in an old G60 rack?
Yes, but you must replace the CT/VT modules with the new generation. Mixing old VTs with a 9E CPU causes DSP errors.I see a “Hardware Mismatch” alarm. What now?
This confirms a generation mismatch. The UR9EH (9E) cannot run with 9A/9C/9D analog modules. Swap the analog modules first.Does this support IEC 61850?
Yes, the UR9EH supports IEC 61850 Ed 1 and Ed 2 via the Ethernet port. Check your license key in Enervista.What is the max operating temperature?
The GE UR9EH is rated for -40°C to +80°C ambient. Derate if installed in a sealed enclosure without ventilation.Is FlexLogic™ included?
Yes, the UR9EH has built-in FlexLogic™ capacity. No extra license is needed for basic logic, only for advanced IEC 61850 features.Do you have the manual?
We include the GE Multilin UR Series Instruction Manual (GEK-113300) with every shipment.I need a replacement fast. Is this in stock?
Inventory moves daily. Contact us for real-time stock status on the GE UR9EH.