Ge’s UR-6CH is a digital I/O module that enables UR relays to communicate with auxiliary devices by providing digital inputs and outputs. This particular unit provides eight C-type digital outputs. The Type C digital output is a single-pole double-throw (SPDT) contact, indicating that there is a common point connected to a normally closed contact (NC) and a normally open contact (NO). Form-C can switch between these two outputs, so it is often referred to as a “transition” contact.

The Universal relay family was built with scalability in mind, providing a hinged panel that allows access to the internal module bays for easy installation and upgrades. While the enhanced model and the normal model differ slightly in accessing the module bays, both units provide a relatively simple entry point for hardware modifications.

Potential buyers should ensure that the module they purchase is suitable for their power system needs, as other digital I/O relays in the same family offer different contact forms and functions. The series also offers devices with trip rated A-contacts, solid-state relay contacts or A, C and SSR combinations. Solid state output modules provide fast tripping, high current breaking capability and fast reset time, making them ideal for direct tripping applications.

Frequently Asked questions about UR-6CH
What are the advantages of integrating digital I/O modules into general-purpose relay Multilin GE systems such as UR-6CH?
The digital I/O characteristics allow the universal relay to obtain contact inputs and contact outputs in order to control and monitor auxiliary devices that may be part of the application-specific protection application of the Universal Multiiln relay. Depending on the ordering options for the digital I/O modules included in the universal relay and the number included, the universal relay can have up to 96 contact inputs (rated at 250 volts) and up to 64 contact outputs. There are different types of GE Multilin digital I/O modules, which determine how many inputs and outputs each I/O module has, and which type of input or output a general purpose relay (UR) can use. For example, the UR-6CH has a 6C ordering option. This means that the output provided by this particular digital I/O module is eight Form-C outputs. If multiple such digital I/O modules are found in a particular relay, it increases the number of Form C outputs that a general-purpose relay can use for a particular end application.