HIRSCHMANN MM2-4TX1-EEC switch
1. Product Introduction / Overview
The Hirschmann MM2-4TX1-EEC (Order Code: 943 722-101) is a 4-port Fast Ethernet media module designed for modular industrial Ethernet switches,
specifically the MICE (MS20/MS30) series mainframes.
Equipped with Extended Environmental Conditions (EEC) certification,
this module provides reliable RJ45 twisted-pair copper connectivity in harsh industrial environments subject to extreme temperatures, high electromagnetic interference, and heavy vibration.
2. Technical Parameter List
| Attribute | Specification |
| Manufacturer | Hirschmann (a Belden Brand) |
| Model Name | MM2-4TX1-EEC |
| Order Number (P/N) | 943 722-101 |
| Series Compatibility | MICE Switches (MS20 / MS30 Mainframes) |
| Port Count & Type | 4 x 10/100BASE-TX, RJ45 sockets |
| Transmission Speed | 10 Mbit/s or 100 Mbit/s (Auto-negotiation) |
| Duplex Mode | Half / Full Duplex (Auto-crossing / Auto-MDIX) |
| Power Supply | Supplied directly via MICE backplane bus |
| Power Consumption | ~1.2 W |
| MTBF | Over 2,000,000 hours |
| Weight | Approx. 180 g |
| Protection Class | IP20 |
3. Product Features / Core Advantages
Extended Environmental Resistance (EEC): Built with conformal-coated circuit boards and industrial-grade components to perform reliably without fan cooling in harsh environments.
Hot-Swappable Design: Can be installed or replaced in live MICE switch backplanes without interrupting network traffic on adjacent modules.
Auto-MDI/MDI-X & Auto-Negotiation: Eliminates the need for crossover cables by automatically detecting cable pinouts and link speeds.
High Density & Compact Footprint: Fits 4 Fast Ethernet RJ45 ports into a single modular slot, maximizing rack and cabinet space efficiency.
4. Model Classification
Within the Hirschmann MICE MM2 media module family, models are classified by port medium and temperature tolerance:
| Model Variant | Order Code | Media Type | Operating Temp Range | Conformal Coating |
| MM2-4TX1 | 943 722-001 | 4x RJ45 (Copper) | $0^\circ\text{C}$ to $+60^\circ\text{C}$ | Standard |
| MM2-4TX1-EEC | 943 722-101 | 4x RJ45 (Copper) | $-40^\circ\text{C}$ to $+70^\circ\text{C}$ | Yes (EEC) |
| MM2-2FX2/2TX1 | 943 718-001 | 2x Fiber MM (SC) + 2x RJ45 | $0^\circ\text{C}$ to $+60^\circ\text{C}$ | Standard |
| MM2-2FX2/2TX1-EEC | 943 718-101 | 2x Fiber MM (SC) + 2x RJ45 | $-40^\circ\text{C}$ to $+70^\circ\text{C}$ | Yes (EEC |