2MLL-EFMF Fast Ethernet Fiber Module: 100Base-FX, SC Multi-Mode
The Honeywell 2MLL-EFMF is a Fast Ethernet communication module for the MasterLogic PLC family. It runs 100 Mbps over 100Base-FX multi-mode fiber. The SC connector links switches or nodes up to 2 km away. It uses the IEEE 802.3U standard and carries TCP-IP and UDP-IP traffic. Engineers pick this module when copper links fail in noisy plant rooms or long cable runs.
Fiber Link Characteristics
- Physical layer: 100Base-FX fiber optic.
- Media: 62.5/125 µm multi-mode fiber.
- Connector: SC type, duplex.
- Transmission speed: 100 Mbps.
- Link distance: 2 km switch or node to node.
- Max nodes: 64.
- Topology: baseband highway.
Protocol Stack
- Ethernet standard: IEEE802.3U.
- Transport protocols: TCP-IP, UDP-IP.
- Access method: CSMA/CD.
- HSL: peer-to-peer high speed link with other MasterLogic PLCs.
- HSL blocks: 200 words per block, up to 128 blocks.
- MLDP: Experion interface, MasterLogic dedicated protocol.
- Modbus TCP slave: supported.
- P2P: Modbus TCP master and user defined protocol master.
Network Control and Firewall
- Software firewall: IP address settings via SoftMaster-NM.
- Public access: DNS server and gateway IP address setting.
- ADSL support: dynamic IP address via DHCP.
- Config tool: SoftMaster-NM.
- SoftMaster interface: supported.
Diagnostics and Front Panel LEDs
- LED set: RUN, I/F, HS, P2P, PADT, PC, ERR, TX, RX, 10/100.
- Auto-scan: finds live nodes on the fiber link.
- Ping test: checks path to peer devices.
- Frame monitor: inspects frame flow for faults.
- Link monitor: watches fiber link health.
Electrical and Mechanical Data
- Current consumption: 630 mA.
- Weight: 120 g.
- Mounting: MasterLogic rack slot.
- Fiber bend radius: respect per cable datasheet.
Oiltech Controls Review
- Tested units link clean at 100 Mbps over 2 km fiber.
- HSL peer-to-peer works well in MasterLogic clusters.
- Modbus TCP slave mode fits Experion and SCADA hosts.
- ERR LED helps spot bad SC polish or dirty ends.
- 630 mA draw needs a check on rack supply budget.
Oiltech Controls’s Insight
- Clean SC ferrules before first link test.
- Use 62.5/125 µm multi-mode fiber only.
- Set IP and gateway in SoftMaster-NM before commissioning.
- Watch TX/RX LEDs to confirm fiber polarity.
- Plan 630 mA of current per module in the rack.
Suitable Equipment
- Honeywell MasterLogic PLC racks.
- Experion systems using MLDP interface.
- SCADA hosts using Modbus TCP slave links.
- Plants bridging long fiber runs between panels.
- Peer-to-peer PLC clusters on HSL.
- Legacy systems replacing copper Ethernet modules.
Installation Notes
- Insert the module in a powered-down rack slot.
- Terminate fiber with SC connectors and check polish.
- Keep bend radius above cable minimum.
- Label TX and RX ends to avoid swap errors.
- Confirm link with ping test after power-up.
FAQ
Q: Can this module link over 2 km?
A: No. Rated distance is 2 km on 62.5/125 µm multi-mode fiber. Single-mode and longer runs need a different module.
Q: Does it work as a Modbus TCP master?
A: Yes. P2P mode supports Modbus TCP master and user defined protocol master functions.
Q: Which fiber type do I need?
A: Use 62.5/125 µm multi-mode fiber with SC connectors. Other core sizes may reduce link margin.
Q: What do ERR and link LEDs tell me?
A: ERR shows frame or link faults. TX/RX blink with traffic. Use frame and link monitors for detail.
Q: Is 2MLL-EFMF a good fit for my upgrade?
A: Match rack type, protocol need, and fiber distance first. Choose 2MLL-EFMF for MasterLogic racks with 100Base-FX and 2 km max runs.
Why Buy From Oiltech Controls?
- 15+ years of industrial automation spare parts sourcing.
- Global shipping by FedEx, UPS, and DHL.
- Tested surplus and refurbished options on request.
- 12-month warranty on qualifying modules.
- Technical check before dispatch on each order.
- Obsolete system support for legacy MasterLogic racks.
Dispatch and Warranty Terms
- Dispatch window: 24 to 28 hours after order confirmation.
- Carriers: FedEx, UPS, and DHL.
- Warranty: 12 months on qualifying products.
- Warranty covers: functional defects under normal use.
- Not covered: broken fiber ends or wrong media.
Contact Information
Inquiries: info@oiltechcontrols.com
Phone / WhatsApp: +86 158 8020 0923
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