Honeywell 2MLF-AD16A / 2MLF-AD16A-CC – 16-Channel Analog Input Module | TotalPlant Solution (TPS) Platform
Engineering Background
The Honeywell TotalPlant Solution (TPS) is a proven distributed control system (DCS) platform widely deployed across refining, petrochemical, power generation, and continuous process industries. The 2MLF series represents the field I/O layer of TPS, providing high-density, high-accuracy signal acquisition directly from field instrumentation.
Product Positioning
The 2MLF-AD16A and its conformal-coated variant 2MLF-AD16A-CC are 16-channel analog input modules engineered for mission-critical process control environments. These modules serve as the primary interface between field transmitters (4–20 mA, thermocouple, RTD) and the TPS controller network, delivering deterministic scan performance and fault-tolerant signal integrity required in SIL-rated and continuous-operation facilities.
Complete Technical Specifications
| Part Number | 2MLF-AD16A |
| Conformal Coat Variant | 2MLF-AD16A-CC |
| Manufacturer | Honeywell Process Solutions |
| Platform | TotalPlant Solution (TPS) / TDC 3000 |
| Module Type | Analog Input (AI) |
| Channel Count | 16 Channels |
| Input Signal Types | 4–20 mA, 1–5 VDC, Thermocouple (J, K, T, E, R, S, B), RTD (Pt100) |
| Resolution | 12-bit (standard); 16-bit (high-resolution mode) |
| Accuracy | ±0.1% of full scale |
| Isolation | Channel-to-channel and channel-to-bus optical isolation |
| Scan Rate | Configurable; typical 100 ms per 16 channels |
| Power Consumption | ≤ 5 W (typical) |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Humidity | 5% to 95% RH, non-condensing |
| Conformal Coating (CC) | Applied on -CC variant for corrosive/high-humidity environments |
| Backplane Interface | TPS Local Control Network (LCN) / High-Performance Process Manager (HPPM) |
| Form Factor | Single-slot TPS card cage module |
| Weight | Approx. 1.0 kg |
| Certifications | CE, UL, FM (Class I, Div 2) |
Proven Application Environments
- Petroleum Refining: Crude distillation unit (CDU) temperature and flow monitoring via thermocouple and 4–20 mA transmitters
- Petrochemical Plants: Reactor feed and product stream analog acquisition in continuous polymerization processes
- Power Generation: Boiler drum level, steam pressure, and turbine inlet temperature measurement
- Pulp & Paper: Digester pressure and temperature profiling in batch and continuous cooking processes
- Offshore Platforms: Conformal-coated (-CC) variant deployed in salt-air and high-humidity topside enclosures
- LNG Terminals: Cryogenic temperature monitoring with RTD inputs at liquefaction train boundaries
Engineering Advantages
- High Channel Density: 16 analog inputs per single card slot reduces cabinet footprint and wiring complexity versus 8-channel alternatives
- Dual-Variant Availability: Standard (2MLF-AD16A) and conformal-coated (2MLF-AD16A-CC) share identical firmware and calibration, simplifying spare-parts management
- Hot-Swap Capable: Designed for live insertion/removal within TPS card cage without process interruption when redundancy is configured
- Optical Isolation: Full channel-to-channel isolation eliminates ground loop interference common in multi-transmitter field wiring
- Long-Term Platform Support: Honeywell TPS/TDC 3000 installed base exceeds 30 years; replacement modules remain critical for brownfield maintenance programs
- Backward Compatibility: Drop-in replacement for earlier 2MLF-AD series modules with no firmware reconfiguration required
System Architecture & Signal Flow
Field transmitters connect via marshalling cabinet terminal blocks → twisted-pair shielded cable → 2MLF-AD16A module terminal connectors → on-board A/D conversion → TPS backplane LCN bus → High-Performance Process Manager (HPPM) or Application Module (AM) → Operator Station (OS) display and historian.
The -CC variant follows an identical signal path; conformal coating is applied post-assembly to the PCB surface only and does not alter electrical characteristics or calibration coefficients.
Sourcing & Quality Verification
- All units sourced from verified OEM channels, authorized distributors, or decommissioned plant inventories with documented provenance
- Pre-shipment inspection includes: visual inspection, firmware version verification, connector integrity check, and functional power-on test where test fixtures are available
- Serialization and date codes recorded and available upon request
- Counterfeit-mitigation protocol: PCB markings, component date codes, and Honeywell label authentication cross-checked against known-good reference units
- Certificate of Conformance (CoC) and test reports available for qualified orders
Procurement Process
- Submit your part number (2MLF-AD16A or 2MLF-AD16A-CC) and required quantity via the Add to Cart button or email support@konmask.com
- Receive stock confirmation and lead time within 24 business hours
- Review and approve formal quotation with unit price, shipping terms (EXW / DDP), and payment terms
- Order confirmed upon receipt of PO or deposit; standard lead time 3–7 business days for in-stock units
- Shipment via DHL / FedEx with full tracking; export documentation (commercial invoice, packing list, COO) included
Technical FAQ
Q: What is the difference between 2MLF-AD16A and 2MLF-AD16A-CC?
A: The -CC suffix denotes conformal coating applied to the PCB for protection against moisture, dust, and corrosive atmospheres. Electrical specifications and firmware are identical.
Q: Is this module compatible with Honeywell Experion PKS?
A: The 2MLF-AD16A is a TPS/TDC 3000 platform module. It is not natively compatible with Experion PKS (C200/C300 series). Confirm your controller platform before ordering.
Q: Can I use this module with a third-party DCS or PLC?
A: No. The 2MLF-AD16A uses Honeywell’s proprietary LCN backplane protocol and is not compatible with non-Honeywell TPS card cages.
Q: What warranty is provided?
A: Konmask provides a 90-day functional warranty on all modules. Extended warranty and exchange programs are available — contact us for details.
Q: Do you provide calibration certificates?
A: Factory calibration data is preserved from original manufacture. Third-party recalibration services can be arranged upon request for critical SIL applications.
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