Overview
The GE Multilin UR8BV, also cataloged as the UR8BV Digital I/O Module, operates as a dedicated hardware component for digital signal acquisition and output control within GE Multilin Universal Relay platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | UR8BV |
| Brand | GE Multilin |
| Origin | United States |
| Product Type | Digital I/O Module |
| Application Platform | GE Multilin Universal Relay (UR) Series |
| Module Function | Digital input monitoring and output control interface |
| Input Signal Type | Dry contact and wet contact monitoring |
| Supported Control Voltages | 24 VDC, 48 VDC, 110-125 VDC/VAC, 220-250 VDC/VAC |
| Input Debounce Time | Programmable, up to 65,000 ms |
| Output Configuration | Form-A/Form-B relay outputs or solid-state outputs depending on configuration |
| Isolation | Electrical isolation between field circuits and relay electronics |
| Dielectric Strength | IEC 60255-5 compliant, 2 kVAC for 1 minute between isolated circuits and ground |
| Surge Immunity | IEEE C37.90.1, IEC 61000-4-4, IEC 61000-4-5 compliant |
| Insulation Resistance | Greater than 100 MOhm at 500 VDC |
| Installation Type | Rear slot installation in GE Multilin UR chassis |
| Dimensions | UR Series standard plug-in module format |
| Operating Temp | -40 deg C to +60 deg C |
| Storage Temp | -40 deg C to +85 deg C |
| Humidity | Up to 95% non-condensing at 55 deg C |
| Power Consumption | Dependent on relay chassis configuration and I/O loading |
GE Multilin UR Series Backplane and I/O Integration
The UR8BV module connects directly to the GE Multilin Universal Relay internal backplane architecture. It exchanges digital status information with the relay CPU module through the internal communication bus. Therefore, the module supports deterministic signal processing for protection logic, control functions, alarms, and interlocking operations.
In addition, the UR8BV uses modular firmware compatibility within the UR platform architecture. The relay configuration software defines input mapping, output logic assignment, and diagnostic monitoring functions according to the installed module position and relay model.
Frequently Asked Questions
Q: Can the UR8BV module be installed in any GE Multilin UR Series relay chassis slot?
A: The UR8BV uses the standard UR Series plug-in format; however, the supported slot position and application depend on the relay ordering code and chassis configuration.
Q: Does the UR8BV support wet contact inputs directly?
A: The module supports configurable contact input monitoring for dry and wet contact applications when the connected voltage level matches the selected input configuration.
Q: Does the UR8BV support hot swapping during relay operation?
A: Module replacement procedures depend on the specific GE Multilin UR relay model. Field replacement should follow the relay maintenance manual and approved isolation procedures.
Field Installation Guidelines
- Install the UR8BV module only in a compatible GE Multilin Universal Relay chassis position defined by the relay configuration.
- Verify the terminal assignment before connecting external contact circuits or output wiring.
- Use shielded wiring practices for signal circuits installed in high electromagnetic interference environments.
- Connect cable shields according to the site grounding standard to reduce electrical noise coupling.
- Separate low-level digital signal wiring from high-energy switching circuits and power conductors.
- Confirm external control voltage polarity before energizing field terminals.
- Check module diagnostics through the relay interface after installation.
- Verify assigned input states and output commands before placing the protection system into service.
