Product Overview

The GE UR 6TH Multilin UR Series Digital I/O Module is a digital I/O component used with compatible GE Multilin UR Series protection and control equipment. It forms part of the relay’s discrete signal interface, allowing external equipment conditions to be incorporated into the relay’s processing and automation architecture.

Digital I/O signals are commonly associated with breaker status, auxiliary contacts, switch positions, alarms, permissive conditions, and interlocks. These signals complement the electrical measurements handled by the protection relay and allow control logic to respond to the actual operating state of connected equipment.

The UR 6TH works together with the host UR Series relay and its configured protection and automation functions. Its practical role depends on the particular relay model, I/O assignment, field wiring, and application requirements.

For maintenance and replacement work, technicians should identify the host relay and existing signal connections before removing the module. This helps preserve the original relationship between field equipment and relay logic.

Technical Specifications

Product Features

The UR 6TH is intended for discrete signal interfacing within compatible Multilin UR Series equipment.

Key characteristics include:

• GE Multilin UR Series digital I/O module
• Model UR 6TH
• Provides digital signal interfacing
• Connects external equipment with relay functions
• Supports equipment status monitoring
• Suitable for breaker and switchgear applications
• Supports alarm and interlock circuits
• Integrates with configured relay logic
• Works within the UR Series I/O architecture
• Suitable for maintenance and replacement applications

The specific function of the I/O points depends on the configuration of the host relay and the connected external circuits.

Working Principle

The UR 6TH operates within the discrete signal path connecting external equipment with the processing system of a Multilin UR Series relay.

A simplified architecture is:

External Equipment → UR 6TH → UR Series Processor → Protection / Control Logic → External Equipment

When an external device changes its discrete state, the corresponding I/O circuit transfers that condition into the relay’s processing architecture. The processor can then evaluate the signal alongside protection elements, alarms, permissive conditions, and interlocking logic.

Depending on the configured application, the resulting logic can generate an alarm, permit or block an operation, or initiate a corresponding control response.

The module therefore serves as an interface between physical equipment conditions and the programmable protection and automation functions of the UR Series system.

Role in a Multilin UR Protection Architecture

The UR 6TH forms part of the digital I/O layer within the Multilin UR Series architecture.

A simplified signal relationship can be represented as:

Field Equipment → Digital I/O → UR Processor → Protection / Automation Logic → Control Circuit

This architecture allows equipment status to become part of a coordinated protection and control strategy.

For example, a breaker auxiliary contact can provide a status condition that the relay uses when evaluating a control sequence or interlock. The digital signal therefore becomes part of the decision-making process rather than simply being displayed as an independent indication.

Industrial Applications

The UR 6TH is suitable for protection and automation installations based on compatible GE Multilin UR Series equipment.

The actual application depends on the host relay model, configured I/O functions, and external equipment.

Installation and Maintenance

Before replacing a UR 6TH, the existing relay configuration and field wiring should be reviewed. Digital I/O circuits can be connected to several equipment functions, so correct identification of each signal is important.

Recommended maintenance checks include:

• Confirm the complete UR 6TH model.
• Identify the host Multilin UR Series relay.
• Verify module compatibility.
• Record the module position.
• Document existing I/O assignments.
• Identify connected field equipment.
• Record breaker, switch, alarm, and interlock circuits.
• Isolate applicable circuits before replacement.
• Inspect connectors and terminals.
• Check field wiring for loose or damaged connections.
• Verify correct module positioning.
• Ensure connectors are fully seated.
• Restore system connections according to the applicable procedure.
• Check expected digital signal states.
• Verify configured control functions.
• Review relay diagnostic information.
• Confirm normal operation of associated equipment.

If a digital signal remains abnormal after replacement, the external circuit should also be inspected. Control voltage, field contacts, wiring, terminals, connectors, and relay configuration can all affect the final I/O indication.

Related Components

The UR 6TH operates as part of a broader Multilin UR Series protection and control system.

The appropriate module should be selected according to the required I/O function and compatibility with the host relay.

Recommended Related Models

For GE Multilin UR Series installations, related models can be considered according to their system roles.

These modules belong to the Multilin UR family, but their functions and compatibility should be verified against the host relay before replacement or substitution.

Key Advantages

• GE Multilin UR Series digital I/O hardware
• Model UR 6TH
• Provides discrete signal interfacing
• Connects external equipment with relay logic
• Supports equipment status monitoring
• Suitable for breaker and switchgear applications
• Supports alarm and interlock functions
• Integrates with configured protection and control logic
• Suitable for utility and industrial power systems
• Useful for maintenance and replacement applications

Technical FAQs

What role does the UR 6TH play in relay-based automation?

The UR 6TH provides a digital interface through which discrete equipment conditions can become available to the UR Series processing and control architecture. These conditions can then participate in configured automation, protection, alarm, and interlocking functions.

Can equipment status be used together with protection logic?

Yes. Digital equipment conditions can be incorporated into configured relay logic alongside electrical protection elements. This allows control decisions to consider both measured electrical conditions and the operating state of connected equipment.

What should be checked if a digital status does not change correctly?

The investigation should cover the complete signal path, including the external contact or device, control voltage, field wiring, terminals, connectors, module status, and relay configuration. Checking only the I/O module may overlook a fault elsewhere in the circuit.

Why is the host relay model important when selecting a UR 6TH replacement?

UR Series equipment uses different hardware configurations and functional assignments. Confirming the host relay and its existing I/O configuration helps ensure that the replacement module matches the intended system architecture and signal requirements.