Description
GE Multilin UR6UH / UR-6UH Digital I/O Module
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | GE Multilin |
| Model | / UR-6UH |
| Series | Universal Relay |
| Product Type | Digital I/O Module |
| Digital Inputs | 4 |
| Digital Outputs | 6 |
| Output Type | Form-A, non-monitored |
| Host Equipment | Compatible UR Series relay |
| Configuration | EnerVista UR |
| Installation | Modular plug-in architecture |
| Approx. Dimensions | 18 × 15 × 4 cm |
| Approx. Weight | 1.15 kg |
The provides four digital inputs and six Form-A outputs without output monitoring. GE Multilin’s UR modular architecture allows this type of I/O module to be installed as part of a larger protection relay configuration, where the CPU, CT/VT modules, power supply, communications, and I/O modules work together.
The UR-6UH is also specifically identified in a utility procurement catalog as a replacement module for a GE Multilin M60 multifunction relay, with the configuration stated as 6 outputs + 4 inputs. This is useful field evidence that the module is used as a discrete I/O component rather than as a standalone relay.
Product Introduction
The GE Multilin is a digital input/output module designed for compatible GE Multilin Universal Relay systems. It provides four digital inputs and six Form-A outputs, allowing the host relay to monitor discrete status signals and operate external auxiliary circuits. The module is installed inside the UR relay architecture and depends on the host relay’s CPU, power supply, configuration, and other installed modules.
For maintenance teams, the GE Multilin is particularly relevant when a relay’s protection functions remain intact but a discrete input or output channel has failed. Its six Form-A outputs are non-monitored, so the module should not be treated as equivalent to a UR I/O variant that includes output-current or continuity supervision. The exact host relay configuration should be checked before replacement.
UR6UH
Application Scenarios & Field Pitfalls — The Engineer’s Perspective
Engineering Pain Point
A failed I/O module in a protection relay can affect breaker control, alarms, interlocks, status acquisition, or other auxiliary functions even when the relay’s CPU and protection algorithms are operating normally. The difficulty with legacy UR systems is that several I/O module variants have similar physical formats but different input/output arrangements.
Typical Applications
- Breaker Control: Six Form-A outputs can be assigned to applicable auxiliary control functions in the host relay.
- Switchgear Status Monitoring: Four digital inputs can receive discrete status information from external equipment.
- Alarm and Interlock Functions: Digital I/O can participate in configured relay logic for alarms, permissives, and interlocks.
- M60 Relay Maintenance: The UR-6UH is specifically documented as a replacement module for compatible GE Multilin M60 installations.
- Substation Protection Systems: Supports discrete control and monitoring functions within compatible UR relay configurations.
Technical Pitfalls
- is not a complete protection relay. It is an internal I/O module and requires a compatible Universal Relay chassis and CPU.
- Confirm the 6-output/4-input configuration. The UR family contains other I/O modules with different channel counts and output characteristics. The specifically provides six Form-A outputs and four digital inputs.
- Form-A outputs are non-monitored. Do not substitute a monitored-output module simply because the connector and mechanical format appear similar.
- Verify the host relay. If the existing installation is an M60, F60, T60, D60, L90, or another UR-family relay, confirm that the particular hardware configuration accepts the .
- Check the external wiring. Before removing the original module, record input assignments, output assignments, common connections, and relay-control logic. A correct replacement module will not correct an incorrectly documented field circuit.
- Preserve the relay configuration. Back up the existing configuration and programmable logic before replacing the hardware whenever the relay remains accessible.
- Do not rely on unsupported module-level communication claims. The is a discrete I/O module. Claims that it independently provides RS-232, RS-485, Ethernet, or Modbus communication should not be used to define the module’s primary function. The available product evidence identifies it primarily as a UR digital I/O module.
- Test every assigned point after replacement. Verify digital input recognition, Form-A output operation, breaker/interlock logic, alarms, and the associated relay logic before returning the protection system to service.
Related Products
- GE Multilin UR6PH — Related UR digital I/O module with a different I/O configuration.
- GE Multilin UR6RH — UR Series digital I/O module with a different hardware configuration.
- GE Multilin UR6TH — Related UR digital I/O module.
- GE Multilin UR7DH — UR communications module rather than discrete I/O.
- GE Multilin UR7GH — UR communications module with a different functional role.
- GE Multilin UR8CH — CT/VT measurement module; not a digital I/O replacement.
- GE Multilin UR8NH — CT/VT module with an 8CT configuration; functionally different from .
- GE Multilin UR9AH — UR CPU/processor module; not an I/O module.
- GE Multilin URRHH — UR power-supply module.
- GE Multilin M60 — Multifunction motor protection relay that can use the I/O configuration in applicable hardware arrangements.
Procurement Note
For a GE Multilin / UR-6UH replacement, record the host relay model, complete module designation, CPU type, firmware revision, existing I/O assignments, and module label before purchasing.
The key identification point is 6 Form-A non-monitored outputs + 4 digital inputs. A replacement advertised simply as a “GE UR digital I/O module” is not sufficient evidence of compatibility. For protection equipment, verify the hardware configuration and perform point-to-point functional testing after installation rather than relying solely on successful relay startup.
