Honeywell 2MLF-AD16A Analog Input Module

Honeywell 2MLF-AD16A 16-Channel Analog Input Module

Product Introduction

The 2MLF-AD16A is a high-density analog input module for the Honeywell MasterLogic-200 programmable logic controller series. This module collects up to 16 analog signals from field sensors and converts them into digital values for the CPU. Specifically, it targets process control loops that need accurate measurement of temperature, pressure, flow, and level signals.

System designers select this module when panel space is limited but channel count is high. Furthermore, the 16-channel density reduces the number of cards per rack. Meanwhile, the fast conversion speed keeps scan cycles short even with many active inputs. Consequently, the 2MLF-AD16A fits both continuous process monitoring and fast-response control duties.

Technical Specifications

The module provides 16 input channels in a single unit, connected through a 32-point terminal block. Isolation uses a photo-coupler between the input terminal and the PLC power supply. However, the design provides no isolation between individual channels.

Core analog parameters include:

• Analog Input Channels: 16 channels per module

• Maximum Conversion Speed: 500 μs/channel

• Accuracy at 25±5 °C: ±0.2% or less

• Accuracy at 0-55 °C: ±0.3% or less

• Internal Current Consumption: DC 5V, 330 mA

• Terminal Type: 32-point terminal

The accuracy specification holds tightly across the operating range. Specifically, drift stays within ±0.3% even at temperature extremes. Therefore, the module maintains measurement integrity in unheated panels and warm process areas alike.

I/O Addressing and Configuration

I/O addresses follow two assignment modes. The fixed type reserves 64 points per module, while the variable type assigns only 16 points. Besides, engineers choose the mode based on the CPU memory plan and the number of installed cards.

The 32-point terminal simplifies field wiring and maintenance. Additionally, the terminal layout separates input pairs cleanly, which reduces cross-wiring errors during commissioning. The module draws 330 mA from the DC 5V backplane rail.

Mechanical and Environmental Parameters

The 2MLF-AD16A weighs just 0.115 kg, so it adds minimal load to the rack. Operating temperature spans 0 to 55 °C, and storage temperature covers -25 to +70 °C. Moreover, operating and storage humidity both range from 5 to 95% RH without condensation.

The module requires an environment free of corrosive gas and dust. In addition, it operates at altitudes below 2000 m with a contamination level below 2. These ratings match typical enclosed control rooms and clean production areas.

Installation Guide

First, switch off the rack power and confirm the backplane is de-energized. Next, slide the 2MLF-AD16A into an available I/O slot and press until the connector engages. Then, secure the module with its retaining screws to resist vibration.

After mounting, wire the field signals to the 32-point terminal according to the channel map. Specifically, use shielded twisted-pair cable for low-level analog signals. Subsequently, set the I/O address mode in the configuration software and download the hardware settings. Finally, apply a known reference signal and verify the converted value against the expected reading.

Packaging List

• 1x Honeywell 2MLF-AD16A Analog Input Module

• 1x Anti-static protective bag

• 1x Individual cardboard box with shock-absorbing foam

FAQ

Q1: How many analog channels does the 2MLF-AD16A provide?
A1: The module offers 16 analog input channels per unit, connected through a single 32-point terminal block for efficient field wiring.

Q2: What is the conversion speed of this module?
A2: Maximum conversion speed reaches 500 μs per channel, which supports fast scan cycles in multi-channel process control applications.

Q3: Does the module isolate each channel from the others?
A3: No, it provides photo-coupler isolation between the input terminal and PLC power, but there is no isolation between individual channels.

Q4: What accuracy can I expect across the temperature range?
A4: Accuracy is ±0.2% or less at 25±5 °C and ±0.3% or less across the full 0-55 °C operating range.

Q5: How do you ship this product?
A5: We ship via Fedex, UPS, and DHL. Each unit travels in anti-static packaging inside a shock-absorbing box for safe delivery.