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Reason MU320E

Process Interface Unit with integrated analog and digital merging interfaces

MU320E is the Process Interface Unit (PIU) with analog and binary interfaces for full switchyard modeling, control and digitalization over IEC 61850 standards & protocols such as Sampled Value (SV) and GOOSE.

The MU320E enables benefits of digital substation, as the I/O interfaces with every bay level IED, especially protective relays and the bay control units. Limiting the field wiring to only the MU320E also reduces project complexity by reducing cabling and physical connections. Bay IEDs can use data from redundant MU320E units, increasing system availability and can be quickly replaced as no field wiring is involved. The MU320E has the additional benefit of improving CT performance and cost through a lower connected burden and a reduction in the number of CT cores required for an application.


Key Benefits

  • Compact form factor supports field installation options into circuit breakers cabinets, marshaling kiosks and metal-clad switchgear.

  • 6 slots for I/O cards allows multiple applications. As a merging unit, Remote I/O device or PIU. Right size and point count for all type of application.

  • High Speed High Break output contact option to directly operate into Circuit Breakers and Switchgears.

  • Card slots for 2 CT/VT analog boards supports application on breaker-and-a-half lines, dual distribution feeders, combination protection and metering installations.

  • Optional metering accuracy CT/VT analog board for revenue metering and power quality applications.

  • 2 SV streams possible (one per CT/VT analog board). Each stream can be protection (80 s/c) or power quality (256 s/c) SV streams.

  • Full integration into the digital substation through 2 Ethernet ports, support for Parallel Redundancy Protocol (PRP) high availability networks and IEEE 1588 Precision Time Protocol.

  • Full IEC 61850 Edition 2, including support for test mode and simulation. Multiple logical devices to integrate multiple circuit breakers and disconnectors in one MU320E.



  • Process Interface Unit for full bay digitalization.

  • Standalone Merging Unit for conventional instrument transformers.

  • Remote I/O (RIO) device for interfacing to primary equipment such as circuit breakers and disconnectors.

  • Bay unit for GE B30X distributed bus bar protection system.

  • Revenue accuracy and power quality metering applications.

  • Breaker-and-a-half line terminals using a single PIU device.

  • Two feeders in a single PIU device.


Reason MU320E


Reason MU320E


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