The module is one type (CPU) of a series of modules intended to replace, upgrade, or provide new capabilities to the Universal Relays series; other modules include CT/VT, power supply, contact input and output, transducer input and output, and inter-relay communications. The UR series has particularly lengthy model numbers due to the fact that each segment corresponds with one of the modules and indicates whether or not the relay possesses the module (and if so, which specific module variation it contains). Users can further examine their unit’s user manual for more information on their relay’s part number.
The CPU handles a variety of input and output signals and helps process communications over various networks the relay is connected to. The CPU also enables the function of some ports, such as the RS485 port located at the back of the relay.
Frequently Asked Questions about UR-9CH
What are the limitations of using a old series CPU in the universal relay Multilin GE system as opposed to a new CPU module? I currently have a UR-9CH, is that an old or a new version of the CPU options?
The UR-9CH is a 9C version of the Multilin CPUs that are found in the UR series of Universal Relays. The UR Multilins are diverse in function are designed with the same premise of providing the UR Multilin end user with a relay that provides comprehensive functions for the most efficient, cost-effective relay with the most advanced technology for the job. The F60 for example is a feeder protection relay to provide comprehensive communication, monitoring, metering, and protection in a compact unit. In contrast, the C70 functions as a capacitor bank protection relay to specifically provide control, monitoring, and protection for capacitor banks. Each UR relay is tailored to the job at hand. Despite the variability of the application, each UR relay contains some of the same base components such as a CPU, a CT/VT module, and I/O module, etc. The UR-9CH is an older CPU with the RS485 and the 10Base-F Ethernet. The limitation of using the older model of a CPU means that the CT/VT module must be of the older series as well (8A, 8B, 8C, or 8D), in the case of the F35 for example.
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