GE Multilin UR-6CH Universal Relay Series Digital I/O Module

Description

The UR-6CH (UR6CH) is an expansion Digital I/O Module engineered for the General Electric Universal Relay (UR) series protection platforms. This module provides localized command and telemetry expansion by adding dedicated control outputs to interface with auxiliary switchgear, breakers, and monitoring systems. Outfitted with the 6C configuration option, the hardware features 8 Form-C digital outputs configured as Single Pole-Double Throw (SPDT) changeover contacts, enabling dual-state switching via a shared common point between one normally closed (NC) and one normally open (NO) contact layout.

Operating as a field-installable hardware option within the scalable Universal Relay modular chassis architecture, this card extends substation automation capacity over internal backplane links. The physical structure is managed via the EnerVista software ecosystem, allowing configuration of complex interlocking logic, contact status monitoring, and alarm outputs. The integration of this module enables standard protective relays to achieve higher point-count densities for comprehensive industrial power management applications.

Features

• Form-C Output Array: Provides 8 independent changeover (SPDT) contacts for versatile contact-state control of auxiliary devices.
• Modular Scalability: Designed for quick insertion into standard UR card slots behind the hinged enclosure faceplate layout.
• Dual-State Switching: Single common terminal architecture connects to standard normally closed and normally open paths.
• Integration Software Support: Fully compatible with the EnerVista suite for point mapping, logic programming, and diagnostics.
• Rigid Form Factor: Built with standard mechanical dimensions optimized for both enhanced and normal horizontal chassis frames.

Applications

• Substation auxiliary equipment monitoring and remote interlocking
• Distribution breaker status control and contact changeover circuits
• Industrial power distribution network status alarming
• General Electric UR Series protection relay input/output slot expansion

Ordering Information

Technical Specifications

Installation Guidelines

Module Slot Access

• De-energize the host protective relay completely before performing any internal hardware upgrades.
• Loosen the retaining fasteners on the UR chassis front assembly and swing open the hinged faceplate to expose the interior module bay.
• Slide the module smoothly along the guide rails into the targeted hardware slot to prevent bending the rear backplane connectors.

Field Wiring Practices

• Ensure that the cross-sectional area of the auxiliary control wires meets local electrical code requirements for the maximum expected current loop.
• Verify terminal assignments for the Form-C outputs, checking the specific common, normally open, and normally closed paths prior to applying external pilot voltages.
• Tighten all terminal block connection screws to the torque levels specified in the standard Universal Relay hardware manual.

FAQ

What are the functional mechanics of the outputs on this specific module?

The module is equipped with Form-C contacts, which are Single Pole-Double Throw configurations. Every output consists of a common point that switches mechanically between a normally closed contact and a normally open contact, acting as a direct changeover mechanism for control circuitry.

How many total contacts can a Universal Relay host system manage if multiple expansion blocks are used?

Depending on the overall architecture of the relay and the specific selection of modules, a single Universal Relay chassis can scale to accommodate a maximum configuration of 96 contact inputs or up to 64 contact outputs.

Is it safe to hot-swap this digital card while the substation relay is operational?

No, internal component modifications require the primary system to be powered down. Accessing the internal module bay via the hinged faceplate should only be executed when the universal relay is isolated from all operational live voltages.