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GE Multilin UR4DH UR-4DH Universal Relay Hardware Module

Configured for protective control signal processing in the GE Multilin Universal Relay (UR) Series platform, the GE Multilin UR4DH (UR4DH Hardware Module) provides direct physical/electrical execution within modular relay chassis architectures.

Hardware Specifications

Parameter	Specification
Model	UR4DH
Brand	GE Multilin (General Electric)
Origin	United States
Operating Temp	-40 deg C to +60 deg C
Product Line	Universal Relay (UR) Series
Module Type	Hardware / Control Module
Chassis Compatibility	GE Multilin UR modular chassis platforms
Communication Support	IEC 61850, Modbus RTU/TCP, DNP 3.0
Dielectric Test	2.0 kV AC for 1 minute (IEC 60255-5)
Impulse Voltage Withstand	5 kV (IEC 60255-5)
Humidity Range	5% to 95% non-condensing

Profinet / EtherNet-IP Deterministic Network and I/O Architecture

The GE Multilin UR4DH is integrated into the Universal Relay modular architecture for coordinated protection, control, and automation functions. The module operates through the UR chassis backplane interface, enabling internal data exchange between relay processing units, input/output assemblies, and communication components.

The UR platform supports deterministic industrial communication structures, including IEC 61850, Modbus RTU/TCP, and DNP 3.0 protocols. The module design supports sequence-of-events (SOE) recording, event logging, and low-latency protective action execution through the relay system firmware environment.

The UR4DH hardware construction incorporates electrical immunity design considerations for protection equipment applications, including resistance to electrical noise, surge conditions, and EMI/RFI interference according to applicable protection relay standards.

Frequently Asked Questions (FAQ)

Q: Is the GE Multilin UR4DH designed for hot-swap replacement?
A: The UR4DH supports modular maintenance procedures within compatible GE Multilin UR chassis configurations. Field replacement procedures must follow the relay system shutdown and maintenance requirements defined for the installed configuration.

Q: Which communication protocols can be processed through the UR4DH platform?
A: The UR architecture supports IEC 61850, Modbus RTU/TCP, and DNP 3.0 communication protocols for protection, monitoring, and automation data exchange.

Q: What environmental protection characteristics are specified for the UR4DH?
A: The module is specified for operation from -40 deg C to +60 deg C with humidity conditions of 5% to 95% non-condensing. Dielectric and impulse withstand ratings are specified according to IEC 60255-5.

Field Installation Guidelines

Install the GE Multilin UR4DH module only in compatible GE Multilin Universal Relay chassis assemblies.

Verify that the chassis power supply is isolated before module insertion or removal. Confirm connector alignment before engaging the module into the backplane interface to prevent mechanical or electrical damage.

Use appropriate cabinet grounding practices for protection relay installations. Cable shields should be terminated according to the site grounding design to minimize electromagnetic interference. Maintain separation between communication wiring and high-voltage power conductors to reduce induced noise.

Before commissioning, verify firmware compatibility, communication configuration parameters, relay addressing, and protective function mapping within the UR system configuration software.

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