About the UR-4CH
GE Multilin’s UR-4CH is a Digital I/O module that allows for the direct, high-speed transfer of data between different UR relays. The digital I/O messaging module enables real-time monitoring of system channels as well as diagnostic health reports that offer a comprehensive review of channel health.
The module further enables communication with sixteen or fewer UR units, allowing for redundant or single rings rather than basic point-to-point configurations. The module reduces the need for auxiliary testing equipment with its built-in diagnostic capabilities. The module also offers connectivity to standard D20 channel banks.
Direct I/O messaging can be configured by the user by editing the system settings, whether using the keypad and LCD or the EnerVista UR software program. Changing the Direct I/O Data Rate can adjust the timing of I/O communications, though it should be noted that the rate for the G.703 module is fixed at 64 kbps. Users can also adjust settings related to ring configuration, alarm triggers, channel crossover, and more.
Module replacement and installation is relatively easy when referencing GE’s Universal Relays user manuals, each of which has a section on proper procedure. A manual such as the 1601-0090-AB2 for the T60 Transformer Protection System includes more information and can be located on AX Control’s website.
