Description
GE Multilin UR6CH | Digital I/O Module | 8 Form-C Relay Outputs
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | GE Multilin |
| Model | UR6CH / UR-6CH |
| Series | Universal Relay |
| Product Type | Digital I/O Module |
| Functional Role | Digital output interface |
| Digital Outputs | 8 |
| Output Contact Type | Form-C |
| Contact Arrangement | SPDT — Common / NO / NC |
| Output Technology | Electromechanical relay contacts |
| Host System | GE Multilin UR Series Universal Relays |
| Configuration | FlexLogic / EnerVista UR Setup |
| Installation | Modular UR relay module bay |
| Approx. Dimensions | 6 × 7 × 1.5 in. |
| Approx. Weight | 2.55 lb |
GE Multilin’s UR-6CH documentation available through technical references identifies the module as a digital I/O module and specifically describes the 6C option as eight Form-C outputs. Form-C contacts provide a common terminal with both normally open and normally closed contacts, allowing the relay output to change state for control or annunciation functions.
Product Introduction
The GE Multilin UR6CH is a digital output module used in GE Multilin Universal Relay systems to provide physical relay contacts for external equipment. Its eight Form-C outputs can be assigned through the UR relay’s programmable logic to perform functions such as breaker control, alarm signaling, interlocking, and other protection-system auxiliary commands.
The important distinction is that the UR6CH is an output-interface module, not the main protection CPU or a standalone PLC I/O rack. The relay’s internal protection and control logic determines when each output operates, while the UR6CH converts those logic decisions into physical Form-C contacts for the surrounding electrical system.
UR6CH
Application Scenarios & Field Pitfalls — Engineer’s Perspective
Engineering Pain Point
A failed UR6CH can appear to be a protection-logic problem when the actual issue is an output contact, module connection, or external wiring fault. Because the module sits between the UR relay’s logic and field equipment, troubleshooting should separate the internal FlexLogic command from the physical output circuit.
Typical Applications
- Circuit-breaker trip and close control
- Protection relay alarm and annunciation circuits
- Substation interlocking
- Disconnect-switch control and status-related logic
- Industrial power-system auxiliary control
Technical Pitfalls to Avoid
- Do not treat as a six-input/six-output module.
Several online listings describe the part as having six digital inputs and six outputs, but the stronger UR-6CH-specific documentation identifies the 6C option as 8 Form-C digital outputs. Procurement should follow the actual module designation and relay configuration. - Do not confuse Form-C outputs with solid-state or Form-A outputs.
Form-C provides COM, NO, and NC contacts. This is materially different from UR modules using Form-A contacts or solid-state outputs, particularly when designing trip circuits or replacement wiring. - Verify the complete UR relay configuration.
The UR platform supports numerous digital I/O module variants, including UR-6AV, UR-6DH, UR-6EH, UR-6FH, UR-6GH, UR-6HH, UR-6LH, UR-6NH, UR-6PH, UR-6RH, UR-6TH, and UR-6UH. These are not interchangeable simply because they occupy the same general module family.
Related Products
- GE UR-6AV — UR digital I/O variant using a different output arrangement.
- GE UR-6DH — Digital I/O module with a different UR Series I/O configuration.
- GE UR-6EH — Alternative UR digital I/O module.
- GE UR-6FH — UR module associated with fast Form-C output applications.
- GE UR-6GH — Another UR digital I/O configuration.
- GE UR-6HH — UR Series digital I/O module with a different hardware arrangement.
- GE UR-6NH — UR digital I/O module providing a different input/output combination.
- GE UR-6TH — UR digital I/O module with a different output/input configuration.
- GE UR-6UH — UR module using Form-A outputs rather than the Form-C arrangement of the .
Procurement Check
Before approving a GE Multilin replacement, verify:
- Exact designation:
- UR relay model and hardware revision
- Module position within the UR chassis
- 8 Form-C output configuration
- Existing COM/NO/NC wiring
- Output function assignments in FlexLogic
- Trip, close, alarm, and interlock circuits connected to the module
- Relay firmware and configuration compatibility
- EnerVista UR Setup configuration
- Terminal condition and contact wear
- Existing external circuit voltage and load characteristics
Recommended procurement description:
GE Multilin / UR-6CH Digital I/O Module, UR Series Universal Relay, 8 Form-C (SPDT) Relay Outputs, Auxiliary Protection, Control, Alarm and Interlocking Interface.
For replacement work, the key identification is = 6C hardware option with eight Form-C outputs. Do not select a replacement based only on the generic phrase “UR digital I/O module”; the different UR-6x variants can have substantially different output arrangements.
