GE Multilin UR 9JH Communication CPU Module Inquiry Item

Details

This GE Multilin UR 9JH is the main CPU communication module for the UR universal relay platform. It integrates RS485 serial communication interface and multimode ST fiber port, supports Modbus and relay inter-fiber communication. It undertakes relay protection logic operation, electrical quantity measurement, fault recording and remote data uploading. The multimode ST optical port realizes long-distance anti-interference communication between relays; the RS485 interface connects to SCADA and HMI system. It is widely used in power substation line, transformer and motor protection cabinets, it is a core spare part for GE Multilin UR protection relays.

Specifications

Model: UR 9JH Brand: GE Multilin (GE Vernova) Series: UR Universal Relay Interface: RS485 serial + Multi-mode ST fiber Fiber rate: 100Base-FX Protocol: Modbus RTU, relay dedicated fiber protocol Mounting: UR relay chassis CPU slot Power supply: Backplane power supply Certifications: CE, IEC, UL

Components & Troubleshooting

Main processing CPU, RS485 transceiver chip, fiber optical transceiver, status LED indicator, gold-plated backplane connector, conformal coated PCB board. Common faults: fiber link loss, RS485 communication no response, module self-check alarm, fault record cannot upload, module not identified.

Disclaimer

This spare part shall be installed and configured by qualified power protection technicians. Power off the relay before replacing the CPU module.