Configured for relay‑processing tasks in the Universal Relays (UR) platform, the GE UR‑9KH (UR 9KH CPU module) serves as the primary computational element for logic execution, latch/gate processing, and CT/VT data interpretation. It provides processor‑level coordination for protection, control, and communication functions across UR‑series modular relay frames.
Hardware Specifications
Parameter
Specification
Model
UR‑9KH
Brand
GE Multilin
Origin
Ontario, Canada
Weight
approx. 1 lb 10 oz
Dimensions
6.5 in × 6 in × 2.5 in
Operating Temp
Not specified
Power Consumption
Not specified
Core Performance Indicators
CPU module type 9K; logic‑framework execution; CT/VT parameter processing; modular UR‑series compatibility; RS‑485 port; 10/100Base‑T Ethernet port (revision update)
Profinet / EtherNet/IP Deterministic Networks
Within UR‑series architectures, the UR 9KH CPU module aligns with deterministic communication timing required for synchronous relay‑logic execution. Its Ethernet 10/100Base‑T port and RS‑485 interface maintain stable propagation intervals for protection‑signal exchange. I/O density scaling is achieved through modular UR frame configuration, while firmware flash compatibility spans versions 4.8 through 6.0x. The CPU module itself contains fixed hardware characteristics and does not perform programmable logic beyond relay‑application execution.
Frequently Asked Questions
Q: How does the UR‑9KH differ from earlier CPU modules? A: The 9K revision includes an added 10/100Base‑T Ethernet port (RJ‑45), improving communication flexibility while retaining the RS‑485 secondary port.
Q: Must CT/VT modules match the CPU module revision? A: Yes. CT/VT modules must be paired with CPU modules of similar release dates to ensure correct parameter interpretation and firmware compatibility.
Q: Is the UR‑9KH compatible with older firmware? A: Yes. Both pre‑revision and post‑revision 9K modules support firmware versions 4.8 through 6.0x.
Field Installation Guidelines
Ensure the CPU module is fully seated in the UR frame to maintain deterministic communication timing.
Maintain separation between Ethernet cabling and CT/VT wiring to reduce noise coupling.
Verify correct pairing of CT/VT module revision before energizing the relay.
Bond shielded communication cables at a single termination point to avoid ground‑loop formation.
Inspect RS‑485 and Ethernet connectors for proper engagement prior to commissioning.
