Product Overview

The Honeywell 2MLF-DC8A​ is a high-performance 8-channel analog current output module belonging to Honeywell’s MasterLogic-200 (ML200) family of programmable logic controller (PLC) I/O modules. As a dedicated analog output (AO) card, the Honeywell 2MLF-DC8A​ converts the digital control signals generated by the MasterLogic-200 CPU into precise DC current signals, delivering eight independent 4–20 mA (or optionally 0–20 mA) output channels that drive modulating field devices such as control valves, I/P converters, damper actuators, and variable speed drives. Within the automation system architecture, the Honeywell 2MLF-DC8A​ plugs directly into the MasterLogic-200 I/O rack, drawing operating power from the backplane and exchanging data with the CPU through the high-speed rack bus.The defining capability of the Honeywell 2MLF-DC8A​ is its channel-level programmability. Each of the eight output channels can be independently configured via MasterLogic programming software or system parameters to operate in either 4–20 mA or 0–20 mA mode, enabling a single module to serve mixed application requirements within the same control panel. This flexibility makes the Honeywell 2MLF-DC8A​ exceptionally well-suited for process control scenarios where different final elements demand different signal conventions. The module supports a maximum load resistance of 550 Ω, providing sufficient drive capability for long-distance analog signal runs to remotely located actuators.Physically, the Honeywell 2MLF-DC8A​ measures approximately 172 mm × 120 mm × 114 mm and weighs just 0.349 kg, occupying a single slot in the MasterLogic-200 rack with a compact, lightweight footprint that simplifies cabinet layout and reduces installation effort. The module carries CE, TUV, UL508, and CSA certifications, attesting to its compliance with international safety and electromagnetic compatibility standards. As a genuine Honeywell component, the Honeywell 2MLF-DC8A​ embodies the brand’s legendary reliability and precision, making it the trusted choice for continuous process industries where analog output accuracy directly translates into product quality, energy efficiency, and operational safety. With a typical 12-month warranty and proven long-term stability, the Honeywell 2MLF-DC8A​ represents both an authentic Honeywell engineering solution and a strategically sound spare parts investment for MasterLogic-200 based automation systems.

Technical Specifications

Main Features and Advantages

The Honeywell 2MLF-DC8A​ delivers exceptional value in industrial analog output applications through its high channel density, precision signal generation, and flexible programmability. At the core of the Honeywell 2MLF-DC8A​ lies a high-resolution digital-to-analog conversion engine that transforms CPU-generated digital control words into smooth, accurate 4–20 mA current signals. Each of the eight channels operates independently, allowing the Honeywell 2MLF-DC8A​ to simultaneously drive diverse field devices—from a 4–20 mA modulating valve on channel 1 to a 0–20 mA speed command to a variable frequency drive on channel 2—without any hardware reconfiguration.Per-channel software configurability: The most distinctive advantage of the Honeywell 2MLF-DC8A​ is its ability to individually select the output range for each channel through MasterLogic programming software or system parameter settings. This granular control means control engineers can adapt the Honeywell 2MLF-DC8A​ to mixed-signal applications without installing separate 4–20 mA and 0–20 mA modules. The result is a leaner, more cost-effective I/O cabinet that maximizes rack space utilization while delivering precisely the signal convention each actuator demands.Robust load drive capability: With a maximum load resistance of 550 Ω, the Honeywell 2MLF-DC8A​ provides ample drive headroom for long analog signal runs. In large process plants where control valves and actuators may be located hundreds of meters from the control cabinet, the Honeywell 2MLF-DC8A​ maintains signal integrity without requiring intermediate signal boosters or repeaters, reducing both installation cost and failure points.Fast, deterministic response: The Honeywell 2MLF-DC8A​ achieves a turn-on response time of approximately 6.5 ms, ensuring that control commands from the MasterLogic-200 CPU are translated into field current changes with minimal latency. This responsiveness is critical for closed-loop control applications such as flow regulation, pressure control, and temperature modulation, where delayed actuator response can degrade control loop stability and product quality.Industrial-grade robustness: Engineered for demanding plant environments, the Honeywell 2MLF-DC8A​ operates reliably across a 0°C to +60°C temperature range with 5%–95% non-condensing humidity tolerance. Its certification to CE, TUV, UL508, and CSA standards guarantees compliance with international electrical safety and EMC requirements, making the Honeywell 2MLF-DC8A​ suitable for deployment in globally regulated industries including oil refining, power generation, pharmaceuticals, and food processing.Seamless MasterLogic-200 integration: As a native member of the Honeywell MasterLogic-200 I/O family, the Honeywell 2MLF-DC8A​ communicates with the CPU through the rack backplane without any protocol conversion or gateway hardware. This tight integration ensures deterministic data exchange, simplified addressing, and unified diagnostics within the MasterLogic-200 engineering environment. Control engineers working with the Honeywell 2MLF-DC8A​ benefit from Honeywell’s mature programming tools, abundant application libraries, and global technical support network.Compact and lightweight design: Measuring just 172 × 120 × 114 mm and weighing 0.349 kg, the Honeywell 2MLF-DC8A​ occupies minimal space in the control cabinet while delivering eight channels of analog output. This high channel-density-to-footprint ratio makes the Honeywell 2MLF-DC8A​ particularly valuable in retrofit projects where cabinet space is constrained and in greenfield designs where I/O count must be maximized within a limited enclosure volume.Genuine Honeywell reliability: Supplied as authentic Honeywell product, the Honeywell 2MLF-DC8A​ carries the full heritage of Honeywell’s century-long leadership in industrial automation. Every Honeywell 2MLF-DC8A​ undergoes Honeywell’s rigorous manufacturing and quality assurance protocols, ensuring pin-compatible replacement for existing MasterLogic-200 installations and worry-free integration into new projects. The standard 12-month warranty on the Honeywell 2MLF-DC8A​ provides additional peace of mind for critical spare parts inventory planning.