Hirschmann MM3-2FXS2/2TX MICE Media Module
Hirschmann MM3-2FXS2/2TX MICE Media Module
The Hirschmann MM3-2FXS2/2TX (Belden Part Number: 943 730-101) is a hot-swappable, 4-port Fast Ethernet media module designed exclusively for the MICE (Modular Industrial Communication Equipment) switch series (MS20 and MS30).
By offering a hybrid interface of both single-mode fiber and copper connections, this module enables industrial networks to adapt to evolving physical infrastructure demands without requiring a complete hardware overhaul.
Unique Product Description
The MICE series represents one of the most successful modular industrial switch concepts ever designed. Rather than deploying fixed-port switches, the MICE platform utilizes a central backplane (such as the MS20 or MS30) that accepts slide-in media modules like the MM3-2FXS2/2TX.
This module features 2 Single-mode fiber ports (100BASE-FX, SC connectors) designed for long-distance trunk lines up to 30 km, alongside 2 Twisted-Pair copper ports (100BASE-TX, RJ45) for localized device integration. This exact hybrid architecture bridges local control cabinets to distant control rooms with zero signal degradation.
MM3-2FXS2/2TX
Product Advantages and Features
True Hot-Swapping (Insert & Remove Under Power): Replace, upgrade, or maintain modules without shutting down the MICE switch backplane. Network traffic on unaffected modules continues to route without interruption.
Long-Distance Fiber Link: The single-mode SC ports support a transmission distance of up to 30 km ($1310\text{ nm}$ wavelength), rendering it immune to massive electromagnetic interference (EMI), ground loops, and lightning surges.
Industrial Hardening: Features a completely fanless, vibration-resistant, and high ESD-resistant enclosure.
Auto-Configuration Recovery: When swapped into an existing slot, the host MICE switch automatically pushes the stored IP, VLAN, and safety configuration directly to the new module.
Technical Table
| Feature / Attribute | Specifications |
| Model Code | MM3-2FXS2/2TX |
| Belden Order Number | 943 730-101 |
| Product Series | MICE Media Module (MM3) |
| Total Port Count | 4 Ports |
| Fiber Ports (Ports 1 & 2) | 2 x 100BASE-FX, Single-Mode SC connectors |
| Copper Ports (Ports 3 & 4) | 2 x 10/100BASE-TX, RJ45 copper sockets (Auto-crossing/negotiation) |
| Fiber Transmission Distance | Up to 30 km (using $9/125\ \mu\text{m}$ single-mode fiber) |
| Optical Transmitter Wavelength | $1310\text{ nm}$ |
| Power Consumption | Maximum 4.8 W |
| Operating Temperature | $0^\circ\text{C}$ to $+60^\circ\text{C}$ (Standard configuration) |
| Diagnostics | Port LEDs (Link/Data status), Module Power LED (P) |
| Dimensions (W x H x D) | $38\text{ mm} \times 110\text{ mm} \times 79\text{ mm}$ (Compact hot-swap cartridge) |
| Weight | Approximately 180 g |
Application Cases
1. Long-Distance Pipeline Monitoring (Water & Gas Utilities)
In geographically distributed processing networks, pumping stations can be separated by tens of kilometers. The MM3-2FXS2/2TX is slotted into MS30 switches inside remote pump cabinets. The 2 TX copper ports connect local PLCs and flow meters, while the 2 FXS2 fiber ports form a redundant, high-voltage-immune single-mode fiber ring linking stations back to the central SCADA facility up to 30 km away.
2. Heavy Industrial Gantry & Crane Systems
In large logistics ports or steel mill cranes, high-voltage motors generate significant electromagnetic noise. By using the single-mode fiber lines of the MM3-2FXS2/2TX for the main communication trunk, the network remains completely isolated from electrical noise, while the local copper ports plug directly into the motor drive controllers on the carriage.
Installation and Maintenance
The physical installation is highly simplified to allow field-level technician servicing:
Module Insertion: Align the plastic guide rails on the MM3 module with the open slot of the MICE switch chassis (MS20 or MS30). Slide the module in firmly until you hear the locking tabs click on the top and bottom.
Securing the Unit: Hand-tighten the integrated retaining screws on the front panel to secure the mechanical mounting against severe cabinet vibration.
Cabling Sequence:
Fiber: Clean the single-mode SC fiber tips using a dry fiber click-cleaner, remove the protective dust caps from ports 1 and 2. and plug in the fiber connectors.
Copper: Insert standard shielded Cat5e/Cat6 RJ45 cables into ports 3 and 4.
Maintenance Swapping: If a port is physically damaged, loosen the retaining screws, pinch the locking tabs, slide the module out, and slide a replacement MM3-2FXS2/2TX directly in. No switch reboot or backup restoration is required.
Related Models & Other Models in the Same Series
The Hirschmann MICE MM3 modular series offers varied port densities and fiber/copper mixes to match specific network topologies:
| Model Code | Belden Order Number | Port Configuration Description |
| MM3-4TX1 | 943 010-001 | 4 x Fast Ethernet 10/100BASE-TX RJ45 copper ports |
| MM3-4FXM2 | 943 722-101 | 4 x Multi-Mode Fast Ethernet ports (SC connectors, up to 5 km) |
| MM3-2FXM2/2TX | 943 721-101 | Hybrid module: 2 x Multi-Mode SC ports + 2 x RJ45 copper ports |
| MM3-1FXS2/3TX | 943 839-101 | Hybrid module: 1 x Single-Mode SC port + 3 x RJ45 copper ports |
| MM3-2FXS2/2TX-EEC | 943 730-102 | Extended temperature version ($-40^\circ\text{C}$ to $+70^\circ\text{C}$) of the standard 2FXS2/2TX |