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.