Honeywell 2MLL-PMEB Profibus-DP Master Module

Applications

• Factory Automation: Connects PLC systems with PROFIBUS-DP-compatible field devices.

• Distributed I/O Systems: Exchanges input and output data with supported remote I/O stations.

• Drive Integration: Enables communication with compatible PROFIBUS-DP motor drives and control equipment.

• Process Automation: Supports data exchange between controllers and distributed instrumentation or automation devices.

• Production Line Control: Coordinates field-level equipment through a configured industrial fieldbus network.

• Legacy System Maintenance: Provides a communication module option for existing Honeywell MasterLogic-200 installations.

Advantages

• PROFIBUS-DP V1 Support: Supports the DP-V1 communication standard, including supported acyclic data exchanges.

• High-Speed Communication: Supports transmission rates up to 12 Mbps.

• RS-485 Interface: Uses an established electrical interface for PROFIBUS-DP networks.

• Automatic Baud-Rate Detection: Supports automatic detection of the network transmission rate.

• Distributed Device Integration: Connects compatible slave devices to the PLC control architecture.

• Dedicated Configuration Tools: Supports N-Configurator for network configuration and SoftMaster for PLC programming.

Technical FAQs

Q1: What is the Honeywell 2MLL-PMEB used for?

It provides PROFIBUS-DP master communication for compatible Honeywell MasterLogic-200 PLC systems.

Q2: Which PROFIBUS-DP version does the 2MLL-PMEB support?

The 2MLL-PMEB supports PROFIBUS-DP V1. Confirm individual communication functions against the module manual and connected device documentation.

Q3: What is the maximum communication speed?

The module supports transmission rates up to 12 Mbps, depending on network configuration and cable requirements.

Q4: What physical interface does it use?

It uses an RS-485 electrical interface over shielded twisted-pair cable.

Q5: How many slave devices can a PROFIBUS-DP network support?

The PROFIBUS-DP standard allows up to 126 station addresses, including master stations. The practical number of connected slaves depends on the network configuration and system limits.

Q6: What is the difference between DP-V0 and DP-V1?

DP-V0 primarily supports cyclic process data exchange and basic diagnostics. DP-V1 adds supported acyclic read/write services and extended diagnostic functions.

Q7: Which software is used to configure the 2MLL-PMEB?

Honeywell documentation identifies N-Configurator as the dedicated configuration tool for the 2MLL-PMEB and SoftMaster as the PLC programming environment.

Q8: Can the 2MLL-PMEB communicate with third-party PROFIBUS devices?

Yes, when the devices comply with the supported PROFIBUS-DP functions and are configured correctly, including their device description files and communication parameters.

Q9: What should be checked if communication fails?

Check the baud rate, station addresses, cable polarity, shielding, termination, device power, configuration settings, and module diagnostic indicators.

Q10: Can the 2MLL-PMEB directly replace the 2MLL-PMEA?

Not as an automatic drop-in replacement. Although both are PROFIBUS-DP master modules, their supported protocol versions and configuration requirements differ. Verify the PLC program, network setup, and hardware compatibility before replacement.