Hirschmann MM20-Z6Z6M2M2EBH media module

Technical Product Description

The Hirschmann MM20-Z6Z6M2M2EBH is an industrial-grade, hot-swappable Fast Ethernet media expansion module designed specifically for Hirschmann’s MICE (Modular Industrial Communication Equipment) switch family (MS20 and MS30 modular series).

By decoding the model configuration structure:

MM20: Fast Ethernet Media Module series for MICE modular backplanes.

Z6 / Z6: Ports 1 & 2 consist of Fast Ethernet SFP slots (100 Mbps) for flexible optical/copper transceiver selection.

M2 / M2: Ports 3 & 4 consist of 100BASE-FX Multi-Mode Optical Fiber interfaces (SC connector type) for short/medium-distance optical backbones.

EBH: Indicates an Extended Environmental rating featuring conformal coating for harsh industrial, chemical, or outdoor conditions, along with extended operating temperature tolerance.

Key Product Advantages & Features

Hot-Swappable Backplane Design: Allows field engineers to insert, swap, or expand ports without shutting down the main MS20/30 switch backplane, maintaining 100% network uptime.

Mixed-Media Versatility: Combines multi-mode fiber transceivers and modular SFP slots in a single module, eliminating the need for standalone media converters.

Conformal Coating (E Rating): Protects internal circuit boards against moisture, corrosive gases, dust, and condensation in aggressive operating environments.

Industrial Hardening: Resistant to high electromagnetic interference (EMI), mechanical vibration (up to 15 g shock), and severe shock conditions.

On-Board Diagnostics: Includes local diagnostic LEDs for instantaneous status tracking (Power, Link, Data Activity, Duplex).

Primary Application Cases

Power Substations & Energy Automation: Deployed in IEC 61850-3 environments where high noise immunity and fiber-optic isolation are required to prevent ground loops and electrical interference.

Oil, Gas & Petrochemical Plants: Utilized in harsh processing environments requiring hazardous location approvals (Class 1. Div 2) and conformally coated PCBs to resist corrosive vapor exposure.

Transportation & Rail Systems: Used in trackside signaling cabinets and wayside communication hubs exposed to extreme outdoor thermal swings ($-40^\circ\text{C}$ to $+70^\circ\text{C}$) and constant mechanical vibration.

Water & Wastewater Facilities: Connecting remote pumping stations and SCADA telemetry units over extended fiber-optic links.

Technical Specifications Summary

Other Models in the Same Series

The MM20 family features multiple port combinations to fit various topology demands:

MM20-Z6Z6Z6Z6SAHH: 4 x Fast Ethernet SFP Slots (Standard temp range, non-coated).

MM20-Z6Z6Z6Z6EBHH / MM20-Z6Z6EBH: 4 x Fast Ethernet SFP Slots with extended temp and conformal coating.

MM20-Z6Z6Z6SBH: 6 x 10/100 Mbps RJ45 Copper ports.

MM20-F2F2SBH: Multi-mode fiber expansion ports with SC/ST connectors.

MM20-Z2F2Z2SBH: Combination of RJ45 copper and multi-mode optical fiber ports.

Installation & Maintenance Guidelines

Installation

Mounting: Ensure the MS20 or MS30 switch base unit is securely mounted to a standard $35\text{ mm}$ DIN rail or panel structure.

Insertion: Align the MM20 module guide rails with the open slot on the MS20/30 base unit. Slide the module in firmly until the backplane connector locks into place.

Securing: Tighten the integrated retaining screws on the module faceplate to maintain earth grounding and mechanical vibration stability.

Cabling: Connect optical patch cables to the Multi-Mode SC ports (observing TX/RX polarities) and insert required SFP transceivers into the SFP slots.

Maintenance

Hot-Swapping: Modules can be removed and replaced under power without interrupting other active slots in the MS20/30 switch chassis.

Cleaning: Keep unused SFP and SC fiber ports covered with dust caps to prevent optical surface contamination.

Diagnostics: Monitor status LEDs regularly. A solid green light indicates active power and link, while flashing amber or red indicates link/duplex mismatch or fault conditions.