HIRSCHMANN MM20-Z6Z6SAHH Ethernet media module
The HIRSCHMANN MM20-Z6Z6SAHH (also designated in configurators as MM20-Z6Z6Z6Z6SAHH) is a hot-swappable Fast Ethernet Media Module engineered for Hirschmann’s modular MICE (Modular Industrial Communication Equipment) Switch family (MS20 and MS30 series).
Designed for mission-critical industrial automation networks, this media module features 4 Fast Ethernet SFP slots, providing flexible fiber optic or copper network connectivity in demanding environments.
Unique Product Description
Hirschmann MM20-Z6Z6SAHH is a 4-port Fast Ethernet SFP media module designed to deliver scalable fiber integration within Hirschmann MS20/30 modular switches. Its hot-swappable backplane architecture allows network engineers to adapt or replace port configurations dynamically without interrupting existing system traffic. Built with high EMC immunity and an IP20 industrial-grade housing, it ensures low latency and robust data throughput across extreme industrial environments.
Product Advantages & Key Features
Flexible Port Density & Modularity: Features 4 Fast Ethernet (100 Mbps) SFP slots supporting single-mode, multi-mode, and long-haul SFP transceivers (such as Hirschmann M-Fast-SFP series).
Hot-Swappable Operation: Can be plugged into or removed from an active MS20/MS30 switch backplane without powering down the system or disturbing adjacent modules.
Industrial Hardening:
Operating Temperature: $0^\circ\text{C}$ to $+60^\circ\text{C}$ (standard).
Storage Range: $-40^\circ\text{C}$ to $+70^\circ\text{C}$.
Shock/Vibration Resistance: Rated up to 15g shock (11 ms duration) and compliant with IEC 60068 standards.
Low Power Consumption: Operates at approximately 4W–8W powered directly via the switch backplane.
Diagnostic LEDs: On-board LEDs provide quick physical status verification for Power, Link, Data, and Duplex status.
Certifications & Compliance:
Safety: cUL 508 (Industrial Control Equipment)
Hazardous Environments: ISA 12.12.01 / Class 1 Div 2 / ATEX Zone 2 options
Immunity: EN 61000-4-2 through EN 61000-4-6 (ESD, Surge, EFT, Conducted Immunity)
Application Cases
The MM20-Z6Z6SAHH media module is widely deployed across industries requiring reliable data routing over extended distances via fiber optics:
Power Substations & Energy Automation: Connects remote protection relays and field RTUs using fiber SFP links to eliminate electromagnetic interference (EMI) from high-voltage switchgear.
Transportation & Intelligent Transit (ITS): Deployed along railway tracks, highway monitoring hubs, and tunnel systems where fiber cables are needed to span multi-kilometer distances.
Oil, Gas & Petrochemical Facilities: Class 1 Div 2 / ATEX approvals make it suitable for control rooms and field cabinets operating in potentially explosive atmospheres.
Water & Wastewater Treatment: Links distributed PLC racks and SCADA nodes across expansive municipal plants via multi-mode or single-mode fiber links.
Other Models in the Same Series
The Hirschmann MM20 / MM30 Media Module Series offers various port combinations (RJ45 copper, ST/SC fiber, SFP slots):
| Model Part Number | Port Types / Configuration | Key Characteristic |
| MM20-Z6Z6SAHH | 4 x Fast Ethernet SFP Slots | Maximum SFP flexibility |
| MM20-T1T1T1T1 | 4 x 10/100Base-TX (RJ45) | All-copper Fast Ethernet ports |
| MM20-M4M4T1T1 | 2 x Multimode SC + 2 x RJ45 | Hybrid Fiber/Copper module |
| MM20-M4M4M4M4 | 4 x Multimode SC Fiber | Fixed multimode fiber connections |
| MM30-00J6J6SAHH | Gigabit SFP & Fast Ethernet mix | High-speed uplink capabilities |
| MM22-T1T1T1T1 | 4 x 10/100Base-TX with PoE | Power over Ethernet support |
Installation and Maintenance
Installation
ESD Precautions: Wear an grounding wrist strap before handling the media module to prevent electrostatic discharge.
Module Insertion: Align the guide rails of the MM20-Z6Z6SAHH with the open slot on the MS20 or MS30 switch backplane. Slide the module inward until it clicks firmly into the backplane connector.
Fastening: Tighten the captive thumb screws on the front panel to secure the module in place.
SFP Transceiver Insertion: Insert approved Fast Ethernet SFP transceivers (e.g., M-Fast-SFP) into the slots until latched, then connect fiber patch cables.
Maintenance
Hot-Swapping: If a module replacement is needed during operation, unlatch the optic cables, loosen the thumbscrews, and pull out the module. Insert the replacement without shutting down power to the host switch.
Visual Inspection: Monitor LED indicators during routine checks:
Link/Data (Green/Yellow): Solid indicates an active connection; blinking indicates active traffic.
Off: Check SFP seated connection or fiber line integrity.
Cleaning: Dust covers should remain on unpopulated SFP slots to prevent optical contamination. Use standard optical cleaning pens on fiber connectors if signal degradation occurs.