HIRSCHMANN MM20-M2T1T1T1EBH Media Module

HIRSCHMANN MM20-M2T1T1T1EBH Media Module

The HIRSCHMANN MM20-M2T1T1T1EBH is an industrial-grade, hybrid 4-port Fast Ethernet expansion module designed for Hirschmann’s MICE (Modular Industrial Communication Equipment) switch series, including the MS20 and MS30 modular base units.

Featuring 1 optical multimode SC fiber port and 3 RJ45 copper ports, along with an extended operating temperature range and conformal coating, this module provides reliable, noise-free uplink connectivity and local device bridging in harsh, high-vibration industrial environments.

Product Introduction / Overview

The MM20-M2T1T1T1EBH plugs directly into the expansion slots of MS20 or MS30 basic switches. Its hybrid layout enables control engineers to connect up to three localized IP field devices (such as PLCs, HMIs, or drives) via standard copper cabling, while utilizing an EMI-immune multimode optical link to communicate back to a central control cabinet or distant network node.

Module Nomenclature Decoding:

[MM20] : Media Module series for Fast Ethernet MICE switches

[M2] : Port 1 -> Multimode 100BASE-FX SC Fiber Connector

[T1] : Port 2 -> 10/100BASE-TX RJ45 Copper Port

[T1] : Port 3 -> 10/100BASE-TX RJ45 Copper Port

[T1] : Port 4 -> 10/100BASE-TX RJ45 Copper Port

[E] : Extended Temperature Range (-40°C to +70°C)

[B] : Backplane Power Integration & Hazardous Location Approvals

[H] : Conformal Coating Protection for Harsh Environments

Technical Table

Environmental Tolerance Conditions

Operating Temperature Range: $-40^circtext{C}$ to $+70^circtext{C}$ ($-40^circtext{F}$ to $158^circtext{F}$)

Relative Humidity: 5% to 95% (non-condensing)

Conformal Coating: PCB treated to resist humidity, salt spray, and airborne dust.

Vibration & Shock Resistance: IEC 60068-2-6 (Vibration) and IEC 60068-2-27 (Shock) compliant.

Hazardous Location Certifications: cULus Class 1 Division 2 (Groups A, B, C, D) and ATEX Zone 2 ready.

Operating Instructions

Hot-Swapping Routine: The module can be inserted or removed while the host MS20/MS30 switch is running. Always disconnect active RJ45 and fiber cables before loosening the module captive screws.

Optical Dust Protection: Keep the protective rubber plug inserted into the SC fiber port whenever no cable is connected to prevent optical lens contamination.

Copper Cable Connection: RJ45 ports automatically detect line speed (10/100 Mbps) and cable type (straight-through vs. crossover via Auto-MDI/MDI-X).

Fault Diagnosis

Related Models of the Same Series

Storage Conditions

Storage Temperature Range: $-40^circtext{C}$ to $+85^circtext{C}$ ($-40^circtext{F}$ to $185^circtext{F}$)

Storage Humidity: 5% to 95% non-condensing relative humidity.

Packaging & Handling: Keep the unit stored in its original antistatic packaging inside a clean, dry indoor room until installation.