2MLL-EFMT Honeywell Fast Ethernet Communication Module

The Honeywell 2MLL-EFMT is a Fast Ethernet communication module designed for MasterLogic PLC systems. It provides high-speed data transmission up to 100 Mbps over standard twisted-pair media, enabling peer-to-peer inter-PLC networking and enterprise-level system integration using Modbus TCP and Experion interface protocols.

Ethernet Standards and Protocol Support

Operating on the IEEE 802.3u Ethernet standard with CSMA/CD network access control, the module features a 100BaseTx physical layer using an RJ-45 interface compatible with CAT5 UTP/STP cabling. It supports a maximum network distance of 100 m between nodes or switches and accommodates up to 64 active nodes.

Supported protocols include Modbus TCP Slave, P2P (Modbus TCP Master and user-defined protocol master), and MLDP for Experion interface connectivity. Security and access features include IP address firewall management within SoftMaster-NM, gateway/DNS configuration, and DHCP support.

High-Speed Link and Network Diagnostics

The module features High-Speed Link (HSL) functionality for fast peer-to-peer data exchange between MasterLogic PLCs, supporting up to 128 send/receive blocks with 200 words per block. Integrated network diagnostic tools include auto-scan, ping testing, frame monitoring, and link status tracking.

Front-panel LED indicators provide real-time status monitoring for RUN, I/F, HS, P2P, PADT, PC, ERR, TX, RX, and 10/100 speed selection. The module draws a backplane current of 410 mA during operation.

Technical Specifications

Frequently Asked Questions

Q: What network protocols does the 2MLL-EFMT module support for controller communication?

A: It supports Modbus TCP Slave, P2P (Modbus TCP Master and User Defined Protocol Master), and MLDP for Experion interface integration.

Q: How much data can be exchanged using the High-Speed Link (HSL) feature?

A: The High-Speed Link feature supports up to 128 blocks, with a maximum capacity of 200 words per block for peer-to-peer communication between MasterLogic PLCs.

Q: What media and connector types are required for network connection?

A: The module requires CAT5 UTP or STP cabling terminated with standard RJ-45 connectors for 100BaseTx connections up to 100 m.