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Hydraulics

Eaton mRFRM Multiplexed Rearfed Fuse and Relay Module

32 outputs, 14 relays, 28 Fuses, High Power, Rugged, and Flexible with J1939 CAN Configuration & Monitoring.

The Eaton mRFRM communicates with other devices on the vehicle’s CAN bus using the SAE J1939 protocol and can be part of a multiplexing system that eliminates the need for individual connections between switches and loads. The Eaton mRFRM works by receiving messages to turn its relays “on” and “off”, and by sending messages indicating the state of its monitored components.

The multiplexed Rear-fed Fuse and Relay Module (mRFRM), is an enhanced version of the Eaton Rear-fed Fuse and Relay Module (RFRM) as it has a Controller Area Network (CAN) interface and rear fed sealed connectors. The mRFRM accepts plug-in components common to power distribution such as fuses, relays, circuit breakers, diodes, etc. and is IP66 compliant.

The mRFRM provides sockets for fourteen (14) relays (10 Form-A and 4 Form-C) and twenty-eight (28) two-bladed sockets for fuses or circuit breakers (CB). Each relay is protected by an associated fuse or CB. Fourteen (14) fuses or CB are for independent outputs. All the output components are electronically interfaced with a CAN control board that monitors the state of components and controls relays that are plugged into the module.

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Specifications

Mechanical

Dimensions, Overall L 235mm x W 124mm x H 108mm Width and length dimensions are to centerline of mounting points
Connection 4 Connection J1- 14 PIN, J2, J3, J4 - 10 Pin Conn

Electrical

Supply Voltage (Vdc) 9-32Vdc System voltage for relay outputs
Inputs: Voltage/Frequency/Digital Each input stud rated to 100 amps 100A max per stud
Outputs: Proportional/Digital 14 relay outputs - 10 single, 4 dual 30A max per terminal 28 fuses- 14 relay - 4 direct connection
CAN Communication (2) CAN SAE J1939 -

Environmental

Operating Temperature Range −40°C to +85°C -
Storage Temperature Range −40°C to +125°C -
Environmental Protection IP66 Silicon and Gore-Tex gasketing

System

Diagnostic/LEDS/Display 28 System fuses for line safety Failed relay notification via J1939
Processor - -
Software The mRFRM is controlled by a CAN controller module over a Controller Area Network (CAN), using CAN J1939 messaging OEMs / Integrators / operators are not able to create custom software for the mRFRM. However, some of the mRFRM’s software settings can be changed
Other Real time monitoring of relay and fuse status Notification via J1939

Features & Benefits

The mRFRM is a power distribution module that distributes power to other devices in a vehicle while communicating over a CAN bus. Because it is a node module, the mRFRM relies on a CAN controller module to control its relays and monitor component status messages -
The mRFRM can function in varying DC electrical architectures, 12V or 24V systems. The mRFRM can be enabled (turned-on) by battery voltage through an active-high ignition input or by ground through an active-low ignition input -
The mRFRM’s CAN control board is protected against over-voltage transients and reverse-voltage conditions and its relay coil drivers are protected from short-circuits -
The mRFRM communicates with other devices on the vehicle’s CAN bus using the SAE J1939 protocol, and can be part of a multiplexing system that eliminates the need for individual connections between switches and loads. The mRFRM works by receiving messages to turn its relays “on” and “off”, and by sending messages indicating the state of its monitored components -

Markets

Transportation -
Heavy Truck -
Construction -
Agriculture -
Military -
Transit Bus/Coach -
Marine -
Recreational Vehicle -
Speciality Vehicle -

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