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Diamond Point International

MEN Mikro F302 - 3U cPCI/CompactPCI® Quad Fast Ethernet / Real-Time Ethernet Interface

4x 10/100 Ports, M12 Connectors, -40 to +85°C Qualified


MEN Mikro's F305 is a 3U CompactPCI 100-Mbit/s networking controller with a strong focus on railway applications. It comes in a compact 4 HP, one-slot width even with its rugged M12 connectors. 

The card provides four Fast Ethernet channels, supporting full-duplex or half-duplex with 10BASE-T and 100BASE-TX physical layers for distances up to 100 m.

As an assembly option, the board is available with or without a real-time Ethernet controller and extended connectivity, making it scalable to system requirements.

Real-Time Ethernet for MTCS

The F305 has a special function as the real-time Ethernet component inside the controller of the MEN Modular Train Control System. MTCS is a platform to perform safe train control functions, focusing on rolling stock applications like Automated Train Operation (ATO) or Automated Train Protection (ATP). It usually consists of the MH50C MTCS controller system and safe remote I/O boxes.

Ring Topology

The distributed MTCS subsystems are connected via RT Ethernet in ring topology, which tolerates single failures. For example, in case of a broken cable, the entire system is still fully operational, as all MTCS subsystems can still be reached from the other end of the ring. The F305 offers the capability of short-connecting two front channels. This is done by the host via software. 

Access to System-Internal MTCS I/O Cards 

In MTCS systems the F305 has a direct link to I/O cards on the same backplane, using the MTCS EBUS, power supply, and address lines. As the F305 itself has no special safety mechanisms and certification, the board must be considered as a black channel.

EN 50155 Rolling Stock and EN 50121-4 / EN 50125-3 Wayside Compliance

The F305 was fully designed to meet the requirements both for vehicle and wayside applications. Its operating temperature complies with the class TX specifications of -40 to +70 °C (10 minutes up to +85 °C). Standard boards include conformal coating. Along with its railway standard compliance and long-term availability of a minimum 10 years, the F305 is a rail-ready component, saving time to arket and costs.



FunctionReal-time Ethernet capability
Optical isolation from other cards
Interface(s)Front Interfaces: Ethernet
• Four M12 connectors, 100BASE-T (100 Mbit/s)
• Two link and activity LEDs per channel
• Channel 1/2 and channel 3/4 can be software-switched to form a loop; optional

Rear Interfaces
• EBUS: optional, two real-time Ethernet channels, ETG.1000
• MTCS: optional, slot ID and chassis ID
Controller(s)4 Ethernet channels, 100 Mbit/s


ExpansionCompactPCI Core Specification PICMG 2.0 R3.0
• Peripheral slot
• 32-bit/33-MHz CompactPCI bus
• V(I/O): +3.3 V (+5 V tolerant)
ETG.1000 EBUS; optional
ElectricalSupply voltage/power consumption:
• +3.3 V (-3%/+5%), consumption tbd
• +5 V (-3%/+5%), consumption tbd
Isolation voltage: 1500 V AC
MechanicalDimensions: conforming to CompactPCI® specification for 3U, 4 HP boards
Conformal CoatingConformal coating as standard
TemperatureTemperature range (operation):
• -40 to +85°C (qualified components) (EN 50155, class TX; EN 50125-3, low temp. class T2, high temp. class TX)
• Air-cooled, natural convection
• EN 50155: Rolling stock, vehicle body
• EN 50125-3: Wayside, at least 3 m off the track inside a switch box
Temperature range (storage): -40 to +85°C
HumidityEN 50155: Rolling stock, vehicle body
EN 50125-3: Wayside, at least 3 m off the track inside switch box
Altitude-300 m to +3000 m
VibrationEN 50155: Rolling stock, vehicle body class B
EN 50125-3: Wayside, at least 3 m off the track
ShockEN 50155: Rolling stock, vehicle body class B
EN 50125-3: Wayside, at least 3 m off the track
Warranty2 Years

Ordering Details

4 Fast Ethernet (M12); rear: real-time Ethernet (EBUS); -40 to +85°C qualified, conformal coating