The Hirschmann MM20-M2M2M2M2EBHH is a Fast Ethernet fiber media module of the MICE series from Germany Hirschmann, a brand under Belden. Developed for MS20/MS30 series modular industrial switches, it is equipped with four 100BASE-FX multimode fiber ports. It expands fiber network interfaces and enables long-distance anti-interference communication, making it widely applicable in harsh industrial environments.
Product Advantages
Industrial-grade ReliabilityIt operates stably over a wide temperature range of -40°C to +70°C with IP20 protection. Resistant to vibration and shock, it complies with IEC 61131-2, CE, FCC, cUL508 and other certifications.
Long-distance Stable TransmissionThe maximum transmission distance reaches 5 km for 50/125μm multimode fiber and 4 km for 62.5μm multimode fiber. It eliminates interference and distance limitations of copper cables.
Hot-swappable Modular DesignModules can be replaced without powering down the system. Fully compatible with MS20/MS30 base switches for flexible port density expansion.
High Anti-interference PerformanceThe all-fiber link isolates EMI and RFI, ideal for sites with strong electromagnetic interference such as power facilities and rail transit systems.
Redundant Network SupportIt supports redundant protocols including HIPER-Ring, MRP and RSTP with failover time less than 50 ms to ensure uninterrupted network operation.
Product Features
Port Configuration4 × 100BASE-FX multimode fiber ports with SC connectors, supporting 10/100 Mbps auto-negotiation per port.
Physical SpecificationsDimensions: 38 × 110 × 79 mm; Weight: approx. 170 g; DIN rail mounting; IP20 protection rating.
Environmental SpecificationsOperating temperature (Model E): -40°C ~ +70°CStorage temperature: -40°C ~ +85°CHumidity: 10% ~ 95% non-condensing
Transmission Performance
- 50/125μm multimode fiber: 0 ~ 5 km, link budget 8 dB
- 62.5μm multimode fiber: 0 ~ 4 km, link budget 11 dB
Supported ProtocolsIEEE 802.3, 802.1Q (VLAN), QoS, port mirroring, SNMPv1/v2/v3 and web management.
Redundancy FunctionsHIPER-Ring (single/dual ring), MRP, RSTP, MSTP and redundant coupling.
Application Scenarios
Industrial AutomationFactory workshops, PLC/DCS control systems and robot communication. It realizes long-distance interconnection of equipment with excellent anti-interference capability.
Power & EnergySubstations, wind power, photovoltaic power generation and power grid monitoring. Optical fiber isolates high-voltage interference to guarantee stable data transmission.
Rail TransitTrain control, metro signaling and wayside monitoring. Wide temperature tolerance and vibration resistance suit on-board and outdoor environments.
Intelligent TransportationExpressway monitoring, tunnel communication and traffic signal control. It delivers reliable long-distance transmission under harsh weather conditions.
Petrochemical IndustryRefining units, hazardous areas and remote monitoring. Fiber optics features explosion-proof performance and meets relevant certifications for hazardous locations.
Related & Supporting Products
Compatible SwitchesMS20-0800/1600/2400, MS30-0800/1600/2400 (MICE series base switches)
Expansion ModuleMB20 expansion card: adds 2 extra media module slots for base switches
Fiber AccessoriesSC-SC multimode fiber patch cords, fiber splice boxes, fiber termination boxes
Management SoftwareIndustrial HiVision: for network monitoring, configuration and fault diagnosis
Peer Modules in the Same Series
- MM20-T1T1T1T1: 4 electrical ports
- MM20-Z6Z6Z6Z6: 4 SFP ports
- MM22-T1T1T1T1: PoE electrical ports
FAQ
Q1: The module cannot be detected and the port LED is off.A: ① Ensure the module is fully inserted and locked in place. ② Verify the switch model; only MS20 and MS30 are compatible. ③ Test with another slot to rule out slot failure. ④ Upgrade the switch firmware if the version is outdated.
Q2: The fiber link fails and the LED flashes abnormally.A: ① Clean or replace the patch cord if the fiber end face is contaminated or scratched. ② Check fiber type; only 50/62.5μm multimode fiber is applicable. ③ Shorten the transmission distance if it exceeds 5 km, or use a single-mode module instead. ④ Test with another port in case of port damage.
Q3: Frequent disconnections occur under high temperature.A: ① Improve ventilation or install heat dissipation devices if the ambient temperature exceeds +70°C. ② Re-seat and fasten loose fiber connectors. ③ Replace the module if it is worn out. ④ Check the power supply (24V DC±10%) for unstable voltage.
Q4: Can this module work with non-Hirschmann switches?A: It can connect to standard 100BASE-FX devices. However, management and redundancy functions such as HIPER-Ring are only supported between Hirschmann devices. Non-compatible devices can only perform basic data transmission.
Q5: Does the module support PoE?A: The MM20-M2M2M2M2EBHH is a pure fiber module without PoE support. For PoE requirements, please select the MM22 series, e.g. MM22-T1T1T1T1.
Q6: How to configure VLAN and redundancy functions?A: Configure via the Web interface (Default IP: 192.168.1.1) or HiVision software.① VLAN: Assign ports to corresponding VLANs.② Redundancy: Enable HIPER-Ring and set up primary and standby ports. The failover time is less than 50 ms.
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