Hirschmann MM20-Z6T1T1T1SAHH Hot-swappable fast Ethernet media module
Product Introduction / Overview
The Hirschmann MM20-Z6T1T1T1SAHH is an industrial-grade, hot-swappable Fast Ethernet media module designed for Belden Hirschmann’s MICE (Modular Industrial Communication Equipment) switch series (specifically the MS20 and MS30 basic switches).
Featuring a hybrid port configuration—1 x Fast Ethernet SFP slot (Z6) and 3 x RJ45 10/100Base-TX copper ports (T1T1T1)—this media module allows network engineers to bridge long-distance optical fiber uplinks with direct local copper connections for PLCs, HMIs, and field devices inside factory cabinets.
Technical Parameter List
| Parameter | Specification |
| Manufacturer | Belden / Hirschmann |
| Product Series | MICE MM20 Modular Series |
| Part Number / Type | MM20-Z6T1T1T1SAHH |
| Total Port Count | 4 Ports |
| Interface Breakdown |
• 1 x Fast Ethernet SFP Slot (100Base-FX) • 3 x RJ45 Ports (10/100Base-TX) |
| Copper Port Specs | Auto-Negotiation, Auto-MDI/MDI-X (Auto-Crossover) |
| Optical SFP Specs | Accepts Hirschmann M-FAST SFP transceivers (Single-mode, Multimode, or Long-Haul) |
| Architecture | Hot-Swappable Backplane Insertion |
| Power Supply | Supplied via host MS20/MS30 switch backplane |
| Protection Class | IP20 |
| Housing Material | Heavy Industrial Polycarbonate / Metal Shielding |
| Approvals & Certifications | CE, FCC, cUL508, Class I Div 2 (HazLoc) compliant |
Product Features / Core Advantages
Hybrid Flexibility: Combines flexible optical fiber uplink capability (via pluggable SFP) with local high-density RJ45 copper connections in a single backplane slot.
Hot-Swappable Architecture: Modules can be inserted or replaced on live MS20/MS30 switches without interrupting power or network traffic on adjacent slots.
Industrial Noise Immunity: Enclosed in heavy EMC-shielded casing to prevent electromagnetic interference common in high-voltage industrial environments.
Zero-Configuration Copper: Auto-negotiation and Auto-MDI/MDI-X eliminate the need for manual speed settings or crossover patch cables.
Diagnostic LED Feedback: Front-panel status indicators show physical link, data activity, and port speed for fast troubleshooting.
Model Classification (MICE Part Number Structure)
The part number MM20-Z6T1T1T1SAHH follows Hirschmann’s modular naming convention:
$$\text{MM20} – \underbrace{\text{Z6}}_{\text{SFP Slot}} \, \underbrace{\text{T1T1T1}}_{\text{3x RJ45 Copper}} \, \underbrace{\text{S}}_{\text{Standard Temp}} \, \underbrace{\text{A}}_{\text{Standard Feature}} \, \underbrace{\text{HH}}_{\text{Hardware Rev.}}$$
MM20: Fast Ethernet Media Module (100 Mbps).
Z6: 1 x Fast Ethernet SFP Transceiver Slot.
T1T1T1: 3 x Twisted Pair / RJ45 10/100Base-TX Ports.
S: Operating Temperature Range — Standard ($0^\circ\text{C}\text{ to } +60^\circ\text{C}$). (Note: E indicates Extended Temperature $-40^\circ\text{C}\text{ to } +70^\circ\text{C}$).
A: Approvals (Standard Industrial / cUL508).
HH: Hirschmann hardware design revision / configuration code.
Environmental Tolerance Conditions
Operating Temperature: $0^\circ\text{C}$ to $+60^\circ\text{C}$ ($32^\circ\text{F}$ to $140^\circ\text{F}$)
Storage Temperature: $-40^\circ\text{C}$ to $+70^\circ\text{C}$ ($-40^\circ\text{F}$ to $158^\circ\text{F}$)
Relative Humidity: 10% to 95% (non-condensing)
Vibration & Shock Resistance: IEC 60068-2-6 (Vibration), IEC 60068-2-27 (Shock) compliant
Contamination Protection: IP20 rated (Designed for installation inside IP54+ control panels or cabinets)
Installation Method
1.Safety & ESD Preparation：1 min。
Wear an ESD (Electrostatic Discharge) grounding wrist strap connected to cabinet earth before handling the electronics card to prevent static damage.
2.Align Module Rails：30 seconds。
Align the side guide rails of the MM20 module with an open, unpopulated media slot on the host MS20 or MS30 switch backplane frame.
3.Seat and Secure：1 min。
Slide the module firmly into the slot until the backplane connector locks in place. Hand-tighten the top and bottom captive thumbscrews to secure it against vibration.
4.Connect Cables：2 min。
• SFP Port: Insert an approved Hirschmann M-FAST-SFP optical transceiver into the Z6 slot until latched, then connect LC fiber cables.
• RJ45 Ports: Insert standard Cat5e/Cat6 shielded twisted-pair cables into the T1 copper ports until the clip clicks.
Operating Instructions
Power-Up Diagnostic: Upon sliding the module into an active switch, the front LEDs will briefly flash to indicate backplane power initialization.
Link Verification:
Solid Green LED: Active link established at 100 Mbps.
Blinking Green/Yellow: Active network traffic transmission/reception.
OFF: Cable disconnected, line unpowered, or distance exceeds limits (100 m for copper).
Hot-Swapping / Maintenance: To replace the module during live operation, disconnect cables, loosen captive screws, pull the module out, and insert the replacement unit without powering down the central switch.
Port Protection: Keep protective rubber dust caps over any unused SFP slots or RJ45 jacks to maintain internal IP20 cleanliness