Honeywell MLL-EMTA – Ethernet Communication Module | ControlEdge HC900 Platform
Engineering Background: The Honeywell MLL-EMTA is a dedicated Ethernet communication module engineered for the ControlEdge HC900 Hybrid Controller platform. Designed to meet the demanding requirements of continuous process industries, this module provides deterministic TCP/IP-based data exchange between the HC900 controller rack and supervisory SCADA, DCS, or historian systems. It is the preferred connectivity solution for engineers requiring reliable, high-throughput Ethernet integration without compromising controller scan-cycle performance.
Product Positioning: The MLL-EMTA serves as the primary Ethernet I/O and peer-to-peer communication interface within HC900 multi-rack architectures. It is widely deployed in refining, petrochemical, power generation, and specialty chemical facilities where network determinism and OEM hardware integrity are non-negotiable procurement criteria.
Complete Technical Specifications
- Part Number / SKU: MLL-EMTA
- Manufacturer: Honeywell Process Solutions
- Platform Compatibility: ControlEdge HC900 Hybrid Controller
- Communication Standard: IEEE 802.3 Ethernet (10/100 Mbps)
- Protocol Support: Modbus TCP/IP, EtherNet/IP (read), HC900 Peer-to-Peer
- Port Configuration: RJ-45 Ethernet interface
- Rack Slot: Dedicated communication slot in HC900 rack
- Power Consumption: Supplied via HC900 backplane
- Operating Temperature: 0°C to 60°C (32°F to 140°F)
- Storage Temperature: -40°C to 85°C
- Relative Humidity: 5% to 95% non-condensing
- Certifications: CE, UL Listed, RoHS compliant
- Weight: 380 g (approx.)
- Country of Origin: USA
- Firmware: Field-upgradeable via HC900 Designer software
Proven Application Environments
- Petroleum refining and upstream oil & gas process control
- Specialty chemical batch and continuous process automation
- Power generation boiler management and turbine control integration
- Pharmaceutical manufacturing with 21 CFR Part 11 audit trail requirements
- Water and wastewater treatment SCADA integration
- Multi-rack HC900 peer-to-peer data sharing architectures
Engineering Advantages
- Non-intrusive integration: Offloads Ethernet communication from the CPU module, preserving controller scan-cycle determinism
- Dual-protocol flexibility: Simultaneous Modbus TCP and HC900 peer-to-peer communication without additional hardware
- Plug-and-play rack installation: Hot-swap capable within HC900 rack architecture (verify with site safety procedures)
- Firmware field-upgradeable: Reduces lifecycle maintenance cost and extends hardware service life
- OEM-sourced hardware: Full Honeywell traceability, warranty, and technical support eligibility
System Architecture & Signal Flow
The MLL-EMTA installs into a dedicated communication slot on the HC900 controller rack backplane. The module interfaces directly with the HC900 CPU (MU-CTSY52 or equivalent) via the internal rack bus, enabling transparent data mapping between controller tags and Ethernet network registers. Upstream, the RJ-45 port connects to plant Ethernet switches (managed or unmanaged, 10/100 Mbps). SCADA hosts running Honeywell Experion PKS, Wonderware, iFIX, or any Modbus TCP-compliant HMI can poll the module at configurable update rates. In peer-to-peer mode, up to 32 HC900 racks can exchange data across a single Ethernet segment without SCADA intermediation.
Sourcing & Quality Verification
- All MLL-EMTA units sourced through authorized Honeywell distribution channels or verified surplus with full inspection
- Pre-shipment functional verification: power-on self-test, LED status confirmation, firmware version check
- Original OEM packaging and documentation supplied where available
- Serialized traceability records maintained for each unit
- 30-day return policy for DOA units; 12-month warranty on verified stock
Procurement Process
- Submit RFQ via support@konmask.com with quantity, required delivery date, and project site
- Receive quotation with lead time, unit price, and shipping options within 1 business day
- Confirm purchase order — payment via T/T, PayPal, or credit card accepted
- Unit inspected, photographed, and shipped with tracking within 2 business days of payment clearance
- Post-delivery technical support available via email or WhatsApp
Technical FAQ
Q: Is the MLL-EMTA compatible with HC900 firmware versions prior to R500?
A: Compatibility depends on the specific firmware build. We recommend confirming your HC900 CPU firmware version before ordering. Contact us for guidance.
Q: Can the MLL-EMTA communicate with third-party PLCs via Modbus TCP?
A: Yes. The MLL-EMTA supports standard Modbus TCP/IP, enabling read/write access from any compliant master device including Siemens, Allen-Bradley, and Schneider controllers.
Q: What is the maximum number of Modbus TCP connections supported simultaneously?
A: The MLL-EMTA supports up to 8 simultaneous Modbus TCP client connections.
Q: Is a replacement module hot-swappable without shutting down the HC900 rack?
A: Hot-swap is mechanically supported by the rack design, but process safety procedures at your site must be followed. Consult your Honeywell system integrator before performing live swaps in critical process environments.
Q: Do you provide a Certificate of Conformance (CoC) or test report?
A: Yes. A CoC and pre-shipment inspection report are available upon request for all verified-stock units.
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