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- Digital I/O Combination Module
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- 120 × 30 × 100 mm
- 0.93 kg
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Product Overview
The GE UR 6AH Multilin UR Series Digital I/O Combination Module is a discrete signal interface component used within compatible GE Multilin UR Series protection and control equipment. It connects external binary signals with the relay’s internal control architecture, allowing equipment status to be monitored and selected control commands to be transferred to external circuits.
The UR 6AH combines digital input and digital output functions in one module. Digital inputs can receive status information from circuit breakers, auxiliary contacts, switches, alarms, and interlock circuits. Digital outputs can be used by the relay to operate external control circuits according to configured protection and automation logic.
Within a UR Series relay, the module works alongside the processor, protection functions, communication interfaces, and other I/O hardware. This arrangement allows the relay to combine electrical protection with equipment status monitoring and discrete control.
For maintenance engineers, the UR 6AH should be evaluated as part of the complete relay I/O configuration. A digital I/O fault may originate from the module, but field wiring, control voltage, terminal connections, external contacts, or relay configuration can produce similar symptoms.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | GE |
| Model | UR 6AH |
| Product Family | Multilin UR Series |
| Product Type | Digital I/O Combination Module |
| Primary Function | Digital Input and Output Interface |
| System Role | Discrete Signal and Control Interface |
| Application | Protection and Control Systems |
| Installation | GE Multilin UR Series Devices |
| Dimensions | 120 × 30 × 100 mm |
| Weight | 0.93 kg |
Product Features
The UR 6AH provides combined digital I/O functionality for compatible GE Multilin UR Series protection equipment.
Key characteristics include:
- GE Multilin UR Series digital I/O module
- Model UR 6AH
- Combined digital input and digital output functions
- Interfaces external binary status signals
- Supports discrete control commands
- Integrates with configured relay logic
- Suitable for breaker and switchgear interfaces
- Supports alarm and interlock circuits
- Connects external equipment with relay control functions
- Suitable for maintenance and replacement applications
The actual assignment of individual I/O points depends on the host UR Series relay and its configured application.
Working Principle
The UR 6AH establishes a discrete signal path between external equipment and the internal processing functions of a Multilin UR Series relay.
A simplified signal relationship is:
External Contacts / Status Signals → UR 6AH Digital Inputs → Relay Logic → UR 6AH Digital Outputs → External Control Circuits
When an external device changes state, the corresponding digital input detects the binary condition and passes the information into the relay processing system. The processor can evaluate this information together with protection elements, interlocks, alarms, and other configured signals.
When a defined control condition is satisfied, the relay can activate an assigned digital output. The output can then operate an external control circuit, auxiliary relay, alarm circuit, or compatible switchgear device.
The UR 6AH therefore forms the physical interface between software-configured relay logic and external electrical equipment.
Role in a Multilin UR Protection Architecture
The UR 6AH occupies the discrete I/O interface layer within a Multilin UR Series protection system.
A typical architecture can be viewed as:
External Equipment → UR 6AH → UR Series Processor → Protection / Control Logic → UR 6AH → External Equipment
| System Layer | Typical Component | Function |
|---|---|---|
| Field Equipment Layer | Breakers, switches, auxiliary contacts | Provides equipment status |
| Digital I/O Layer | UR 6AH | Interfaces discrete signals |
| Processing Layer | UR Series Processor | Processes status and control logic |
| Protection Layer | Protection Functions | Detects configured electrical conditions |
| Communication Layer | Relay Communication Interface | Exchanges system information |
| Control Layer | Digital Outputs | Operates external control circuits |
This architecture allows external equipment status to become part of the relay’s protection and automation strategy.
For example, breaker auxiliary contacts can provide open or closed status to the relay, while a configured digital output can participate in a trip, close, alarm, or interlocking sequence.
Industrial Applications
The UR 6AH is applicable to electrical protection installations where a Multilin UR Series relay needs to exchange discrete signals with external equipment.
| Application | Typical Use |
|---|---|
| Power Generation | Generator breaker status and control |
| Substation Automation | Switchgear monitoring and control |
| Transmission Systems | Protection-system interlocking |
| Distribution Systems | Feeder breaker monitoring |
| Motor Protection | Contactor and auxiliary-status monitoring |
| Transformer Protection | Alarm and trip circuit interfaces |
| Industrial Power Systems | Equipment interlocks |
| Utility Automation | Remote status and control |
The actual application depends on the host relay model, I/O assignment, and external control circuit.
Installation and Maintenance
Before replacing a UR 6AH, the complete relay configuration should be identified. Digital I/O hardware is directly connected to external control circuits, so the module position and wiring should be documented before removal.
Recommended maintenance checks include:
- Confirm the complete UR 6AH model designation.
- Identify the host Multilin UR Series relay.
- Verify module compatibility.
- Record the existing module position.
- Document digital input assignments.
- Document digital output assignments.
- Identify connected breaker, alarm, switch, and interlock circuits.
- Isolate the applicable control circuits before replacement.
- Inspect connectors and terminals.
- Check external wiring for loose or damaged connections.
- Verify correct module positioning.
- Ensure connectors are fully seated.
- Restore system connections according to the applicable procedure.
- Check digital input status.
- Test configured digital output functions.
- Review relay diagnostics.
- Confirm associated protection and control functions.
If a digital input remains inactive after replacement, the external contact, control voltage, field wiring, and relay configuration should also be checked. An output that fails to operate an external device should likewise be traced through the complete downstream control circuit.
Related Components
The UR 6AH normally operates as part of a broader Multilin UR Series protection system.
| Component | Function |
|---|---|
| UR Series Protection Relay | Provides protection and control functions |
| UR 6AH | Interfaces digital input and output signals |
| UR 5CH | Interfaces transducer-related signals |
| UR 1HH | Provides relay operating power |
| Processor Module | Executes protection and control logic |
| Breaker / Switchgear | Provides status and receives control commands |
| Auxiliary Contacts | Provide equipment position information |
| Terminal Hardware | Connects external field wiring |
| Communication Interface | Connects the relay with supervisory systems |
These components should be considered together during troubleshooting because a fault anywhere along the signal path can produce similar I/O symptoms.
Recommended Related Models
For a Multilin UR Series installation, related hardware should be selected according to the required signal and system function.
| Model / Product Family | Product Type | Typical Application |
|---|---|---|
| GE UR 6AH | Digital I/O Combination Module | Discrete status and control |
| GE UR 5CH | Transducer I/O Module | Transducer signal interface |
| GE UR 1HH | Power Supply Module | Relay power infrastructure |
| GE Multilin UR Series Relays | Protection and Control Relay | Electrical protection |
| GE Multilin UR Feeder Protection Relays | Feeder Protection Relay | Feeder and distribution protection |
| GE Multilin UR Generator Protection Relays | Generator Protection Relay | Generator protection and control |
The UR 6AH and UR 5CH serve different I/O functions. The UR 6AH focuses on digital status and control signals, while the UR 5CH is associated with transducer interfaces.
Key Advantages
- GE Multilin UR Series digital I/O hardware
- Model UR 6AH
- Combined digital input and output capability
- Supports external equipment status monitoring
- Supports relay control and automation functions
- Interfaces breaker and switchgear circuits
- Supports alarm and interlock applications
- Integrates with configured protection logic
- Suitable for utility and industrial protection systems
- Useful for maintenance and replacement of existing UR Series equipment
Technical FAQs
How is the UR 6AH used for breaker status monitoring?
The module can receive binary status information from compatible breaker auxiliary contacts through its digital input interface. The relay can then use that status as part of its protection, control, alarm, or interlocking logic.
What role can the UR 6AH play in an automated protection sequence?
The digital inputs can provide external equipment status to the relay, while digital outputs can be assigned to appropriate control functions. The relay processor evaluates these signals according to the configured protection and automation logic.
What should be checked when a digital input on the UR 6AH does not respond?
The troubleshooting process should include the external contact, control voltage, field wiring, terminal connections, module connector, I/O configuration, and relay diagnostics. This helps determine whether the problem originates in the module or elsewhere in the signal path.
Why is the UR 6AH useful in a Multilin UR Series control system?
It allows the relay to exchange discrete information directly with external equipment. This connection lets protection logic work together with breaker status, alarms, interlocks, and control commands instead of treating these functions as separate systems.