HIRSCHMANN MM20-M2T1T1T1SAHH Media Module

HIRSCHMANN MM20-M2T1T1T1SAHH Media Module

The HIRSCHMANN MM20-M2T1T1T1SAHH is a versatile, hybrid 4-port Fast Ethernet expansion module engineered for Hirschmann’s MICE (Modular Industrial Communication Equipment) series switches, specifically the MS20 and MS30 modular base units.

Featuring a combination of 1 optical multimode fiber port and 3 copper RJ45 ports, this hybrid module offers a cost-effective solution for bridging localized copper network devices with long-distance fiber backbones.

Product Introduction / Overview

The MM20-M2T1T1T1SAHH plugs directly into the expansion slots of MS20 or MS30 modular switches. Its hybrid design allows control engineers to connect up to three local IP field devices (such as PLCs, HMIs, or I/O racks) via standard RJ45 cables while simultaneously linking to a remote network cabinet over an interference-free multimode fiber connection.

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

[S] : Standard Temperature Range (0°C to +60°C)

[A] : Standard Approvals (cUL508. CE, FCC)

[HH] : Dual Hirschmann Standard Release / Firmware Compliance

Technical Parameter List

Product Features / Core Advantages

Hybrid Port Architecture: Combines high-density copper port connectivity with an isolated optical fiber uplink on a single expansion card.

Auto-Crossover Capability: All three copper RJ45 ports feature Auto-MDI/MDI-X, eliminating the need for crossover patch cords when connecting to field controllers or switches.

Noise Isolation: The optical SC port provides galvanically isolated transmission, preventing ground loops and protecting the local switch assembly against noise surges.

Hot-Swappable Backplane: Integrates seamlessly into live MS20/MS30 switch chassis, allowing hot addition or replacement without network interruption.

Model Classification

The Hirschmann MICE MM20 system offers varied combinations of copper (RJ45), optical (SC/ST), and SFP interfaces:

Environmental Tolerance Conditions

Operating Temperature: $0^circtext{C}$ to $+60^circtext{C}$ ($32^circtext{F}$ to $140^circtext{F}$)

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

Relative Humidity: 10% to 95% (non-condensing)

Standard Industrial Safety: cUL508. cUL1604. CE mark, FCC Part 15 Class A

Installation Method

Safety Preparation: Put on a grounded electrostatic discharge (ESD) wrist strap before handling the card.

Module Alignment: Locate an open expansion slot on the host MS20 or MS30 basic switch unit. Line up the top and bottom rails of the module with the guide slots inside the switch frame.

Insertion: Push the media module steadily into the slot until its rear connector locks completely into the backplane board.

Fastening: Tighten the captive thumb screws on the top and bottom of the module faceplate to ensure electrical grounding and mechanical security.

Cabling:

Plug Category 5e/6 industrial RJ45 cables into the three copper ports.

Remove the dust cap from the optical SC port and attach a duplex multimode fiber cable, making sure Tx connects to Rx on the remote end.

Operating Instructions

LED Link Verification: Check the front-panel LEDs after powering on. Green indicates an active link, while flickering amber signals data packet traffic.

Optical Fiber Care: Keep the rubber protective cap fitted on the SC fiber port whenever no cable is plugged in to protect the internal optical lens from dust accumulation.

Hot-Swapping Routine: The module can be safely inserted or replaced while the host switch remains operational. Always remove connected network cables prior to unmounting the unit.