HIRSCHMANN MM20-Z6M2M2T1SAHH Fast Ethernet media module
Unique Product Description
The HIRSCHMANN MM20-Z6M2M2T1SAHH is a hot-swappable 4-port hybrid Fast Ethernet media module engineered for Hirschmann’s modular MICE (Modular Industrial Communication Equipment) series switches—specifically the MS20 and MS30 basic switch frames.
This specific part number configuration decodes into a hybrid mix of interfaces:
Z6: 1 $\times$ Fast Ethernet SFP slot (for pluggable fiber transceivers)
M2M2: 2 $\times$ 100Base-FX Fast Ethernet Multimode ports with SC connectors
T1: 1 $\times$ 10/100Base-TX RJ45 copper port
SAHH: Standard industrial temperature rating (0°C to +60°C), cUL508 and ISA 12.12.01 Class 1 Div 2 approvals for industrial and hazardous location usage.
It allows system integrators to combine customizable SFP optics, fixed multi-mode fiber runs, and direct copper device connections in a single slot without taking down adjacent live network segments.
Application Cases
Factory Automation & Process Control: Connects direct copper equipment (e.g., local PLCs or HMIs) while driving multi-mode fiber runs back to control center switches.
Modular Cabinet Expansion: Ideal for control cabinets requiring a mix of legacy multi-mode fiber infrastructure alongside SFP uplinks for long-distance single-mode extensions.
Hazardous Location Deployments: Certified for ISA 12.12.01 Class 1 Div 2 environments, making it suitable for oil, gas, and chemical monitoring sub-stations.
Power Utilities & Transportation: Provides low-latency, noise-immune Fast Ethernet backhaul across noisy electrical or roadside environments.
Product Advantages and Features
Flexible Multi-Interface Combination: Integrates standard RJ45 copper, multi-mode SC fiber, and a pluggable Fast Ethernet SFP slot in a single module backplane slot.
Hot-Swappable Backplane Architecture: Modules can be inserted or removed from live MS20/MS30 switches without interrupting power or other active network ports.
Ruggedized Industrial Build: Designed to withstand high vibration, shock up to 15g, and harsh electromagnetic interference (EMI) typical of industrial plants.
Integrated Physical Diagnostics: LEDs provide visual status for power, port link, speed, and duplex modes for local troubleshooting.
Auto-MDI/MDI-X & Auto-Negotiation: The copper port automatically matches speed and pinout configuration, eliminating the need for crossover cabling.
Other Models in the Same Series
The MM20 series media modules offer flexible configuration options within the MICE MS20/MS30 ecosystem:
| Model Part Number | Interface Configuration | Temperature / Coating Tier |
| MM20-Z6Z6T1T1SAHH | 2 $\times$ SFP Slots + 2 $\times$ RJ45 Copper | Standard (0°C to +60°C) |
| MM20-Z6Z6Z6Z6SAHH | 4 $\times$ Fast Ethernet SFP Slots | Standard (0°C to +60°C) |
| MM20-Z6Z6Z6Z6EBH | 4 $\times$ Fast Ethernet SFP Slots | Extended (-40°C to +70°C) + Conformal Coated |
| MM20-T1T1T1T1SAHH | 4 $\times$ 10/100Base-TX (RJ45 Copper) | Standard (0°C to +60°C) |
| MM20-M2M2T1T1SAHH | 2 $\times$ Multimode SC Fiber + 2 $\times$ RJ45 | Standard (0°C to +60°C) |
| MM20-P9P9T1T1SAHH | 2 $\times$ Single-Mode SC Fiber + 2 $\times$ RJ45 | Standard (0°C to +60°C) |
Installation and Maintenance
Installation
Mechanical Slotting: Align the guide rails of the MM20-Z6M2M2T1SAHH module with an available media slot on the host MS20 or MS30 basic unit.
Backplane Engagement: Slide the module firmly until the backplane connector locks into place.
Fastening: Hand-tighten the top and bottom captive thumbscrews on the faceplate to secure mechanical grounding and lock the chassis.
Cabling: Insert an approved SFP into the SFP slot, connect multi-mode SC fiber cables to the M2 ports, and attach a standard Cat5e/Cat6 cable to the T1 RJ45 port.
Maintenance
Live Hot-Swapping: If a port failure occurs, loosen the captive thumbscrews and pull the module out. Insert a replacement unit while the main switch remains powered on.
Status Verification: Verify port link LEDs on the front panel post-installation to ensure auto-negotiation and link establishment.
Dust Protection: Keep unused fiber ports and SFP slots covered with rubber dust caps when not in active use.