The GE Multilin UR-SHA serves as the primary UR-SHA Power Supply Module utilized to execute dedicated voltage conversion and dry contact excitation across Universal Relay (UR) backplane platforms.
Hardware Specifications
Parameter
Specification
Model
UR-SHA
Brand
GE Multilin
Origin
Canada (Markham, Ontario)
Weight
Approx. 0.96 kg
Dimensions
16.5 x 16.5 x 4.5 cm
Operating Temp
Standard UR Chassis Ambient
Power Consumption
Self-contained internal converter
Input Power Rating
125 to 250 V Nominal
Dry Contact Output
48 VDC
Diagnostics
Integrated Hardware Health Monitoring
Status Indication
Front Panel LEDs
Supported Software
EnerVista UR
Backplane Bus Communication Velocity & I/O Density Scaling
The UR-SHA power supply maintains stable DC rail voltages across the internal backplane bus, enabling uninterrupted backplane bus communication velocity for secondary CPU and high-speed protection modules. By sustaining rigid load regulation, the module supports maximum I/O density scaling within the Universal Relay chassis without triggering undervoltage lockouts or degrading the sampling rates of analog acquisition cards during high-demand transient events.
Frequently Asked Questions
Q: How does the UR-SHA indicate internal hardware faults during backplane operation?
A: The module is equipped with front panel LED indicators driven by internal self-diagnostic routines, which immediately flag system errors or hardware health degradation without requiring continuous polling from the EnerVista UR software.
Q: What is the secondary output provided for external physical loops?
A: The UR-SHA generates a regulated 48 VDC output specifically dedicated to powering dry contact inputs wired to the discrete I/O cards within the same relay node.
Field Installation Guidelines
De-energize all primary 125-250 V nominal input feeds before inserting or extracting the power supply from the UR chassis to prevent arcing on the backplane connectors.
Slide the module squarely into the designated power supply slot until the rear connectors fully mate with the internal backplane bus pins.
Secure the front panel using the captive fasteners to ensure continuous mechanical ground and proper EMI shielding.
Verify the polarity and wire gauge of the input wiring on the rear terminal blocks prior to applying main power.
Monitor the front panel LEDs immediately upon energization to confirm hardware health and proper internal bus voltage stabilization.
