HIRSCHMANN MM20-T1T1T1T1EBH 4-port Fast Ethernet Copper Cable Media Module

HIRSCHMANN MM20-T1T1T1T1EBH (order configurator code: MM20-T1T1T1T1EBHH) is an extended-environmental, hot-swappable 4-port Fast Ethernet copper Media Module designed for Hirschmann’s modular MICE Switch family (MS20 and MS30 series).

Featuring 4 x RJ45 ports (10/100Base-TX) combined with PCB conformal coating and an expanded temperature range, this module provides reliable local device connectivity in extreme industrial, chemical, and outdoor environments.

Product Overview

Hirschmann MM20-T1T1T1T1EBH is a heavy-duty, 4-port Fast Ethernet RJ45 media module engineered for harsh field communications within MS20/30 modular switches. Combining auto-negotiation and hot-swappable modularity with conformal coating protection, it enables continuous, high-reliability copper expansion across extreme thermal ranges and corrosive atmospheric conditions without interrupting live backplane operations.

Technical Parameter List

Product Features & Core Advantages

Environmental Hardening (EBH Spec): Includes conformal coating across circuit boards to resist moisture, corrosive vapors, and conductive dust accumulation.

Hot-Swappable Architecture: Allows live insertion or removal from active MS20 or MS30 basic switch units, eliminating maintenance downtime for adjacent modules.

Direct Copper Integration: Provides 4 high-density RJ45 drops without needing separate SFP transceivers.

Auto-Crossing & Speed Sensing: Auto-MDI/MDI-X eliminates crossover cables, while auto-negotiation optimizes speed (10/100 Mbps) and duplex modes automatically.

Heavy EMC Immunity: High resistance to electromagnetic interference (ESD, surge, and fast transients) compliant with substation standards.

Environmental Tolerance Conditions

Operating Temperature Range: $-40^circtext{C}$ to $+70^circtext{C}$ (Extended Environmental Condition).

Storage Temperature Range: $-40^circtext{C}$ to $+85^circtext{C}$.

Relative Humidity: 10% to 95% (Non-condensing).

Conformal Coating: Applied to protect delicate components against chemical fumes, salt spray, and atmospheric condensation.

Shock & Vibration Resistance: Tested per IEC 60068-2-6 (vibration) and IEC 60068-2-27 (15g shock, 11 ms duration).

Model Classification

Within the Hirschmann MICE MM20/MM30 series, modules are classified by port type, speed, and environmental tier:

Installation Method

ESD Safety Prep: Put on an anti-static wrist strap connected to cabinet ground before unboxing the unit.

Backplane Insertion:

Locate an open media slot on the host MS20 or MS30 basic switch.

Slide the MM20-T1T1T1T1EBH smoothly along the guide rails until the backplane connector locks into place.

Mechanical Securing: Hand-tighten top and bottom captive thumbscrews on the faceplate to ground the module chassis to the switch rack.

Cabling: Insert industrial shielded twisted-pair (STP) Cat5e/Cat6 cables into the RJ45 jacks until the release tabs click.

Operating Instructions

Hot-Swap Operation: The module can be installed, swapped, or serviced while the parent switch remains powered. Network management software automatically detects the module status change.

Diagnostic LED Status Reading:

Link/Data LED (Green/Yellow): Solid indicates a valid link; flickering indicates active packet transmission.

Off: Inspect cable connections, verify connected end-device power, or test cable length limit (max $100text{ meters}$).

Port Dust Management: Keep protective rubber plugs inserted in unpopulated RJ45 ports to maintain IP20 integrity and prevent dust or chemical vapor ingress.