Honeywell 2MLF-AD8A 8-Channel Analog Input Module

Overview

The Honeywell 2MLF-AD8A analog input module is engineered for dependable multi-channel signal acquisition within the MasterLogic ML200 PLC platform. Designed for continuous process monitoring, it supports common industrial analog signals while maintaining stability and accuracy in electrically demanding environments.

This module integrates seamlessly into local ML200 base racks and is optimized for long-term operation in critical control systems where measurement integrity and system uptime are essential.

Key Functional Capabilities

The 2MLF-AD8A provides eight independent analog input channels capable of handling both current and voltage signals. Built-in isolation and signal conditioning protect the control system from electrical interference, ensuring clean and reliable data delivery to the PLC CPU.

Its architecture is intended for standard process automation tasks rather than high-speed data capture, making it ideal for temperature, pressure, flow, and level measurement applications.

Electrical Specifications

• Supported input modes include 4–20 mA current and 0–10 V voltage signals
• Minimum 12-bit analog-to-digital conversion resolution
• Successive approximation A/D conversion technology
• High input impedance in voltage mode and low burden resistance in current mode
• Typical measurement accuracy within ±0.5% of full scale
• Electrical isolation between channels and backplane circuitry
• Optimized power consumption compatible with ML200 rack configurations

Mechanical Design

• Plug-in module format for Honeywell ML200 local racks
• Industrial molded housing with conformal coating for enhanced durability
• Removable terminal blocks for simplified field wiring and maintenance
• Compatible with 18–24 AWG control wiring
• Recommended use of shielded twisted-pair cables to reduce noise
• Weight: 0.35 lbs

Environmental Operating Conditions

• Operating temperature range from 0°C to +55°C
• Storage temperature tolerance from –25°C to +70°C
• Designed for environments with up to 95% non-condensing humidity
• Compliant with industrial vibration and EMC requirements
• Suitable for installations with high electrical noise levels

System Compatibility and Compliance

The 2MLF-AD8A is fully compatible with Honeywell MasterLogic ML200 and MasterLogic PLC architectures. It conforms to relevant international standards for industrial control equipment, including CE and RoHS directives, and is approved for use in regulated industrial environments.

Typical Applications

• Oil and gas refining and processing units
• Chemical and petrochemical production facilities
• Power generation and utility infrastructure
• Water and wastewater treatment systems
• General manufacturing and continuous process automation

Frequently Asked Questions

Can the 2MLF-AD8A handle mixed signal types simultaneously?
Yes. Each channel can be individually configured to accept either current or voltage inputs, allowing flexible signal integration within a single module.

Is this module suitable for harsh industrial environments?
Yes. Its conformal coating, isolation design, and EMC protection make it well suited for electrically noisy and vibration-prone installations.

Does the module support remote I/O configurations?
The 2MLF-AD8A is designed primarily for local rack installation within ML200 systems. Remote I/O solutions require compatible communication modules.