HONEYWELL 2MLB-M08A 8-Slot Main Base for MasterLogic-200 PLC

Overview

The HONEYWELL 2MLB-M08A is an 8-slot main backplane base for the Honeywell MasterLogic‑200 (ML200) modular PLC system. The HONEYWELL 2MLB-M08A serves as the primary rack that accepts one CPU module plus up to seven I/O modules in its 8 slots. It provides the high-speed backplane communication bus, power distribution and mechanical mounting interface for the station. The conformal coated variant is 2MLB-M08A-CC. It is widely used in oil & gas, chemical, power, water treatment and general process automation as a spare rack for ML200 control cabinets.

Features

The HONEYWELL 2MLB-M08A supports 8 module slots, with one slot reserved for CPU and the rest for digital/analog I/O, communication and special function modules. The HONEYWELL 2MLB-M08A can be connected to extension bases to expand the total I/O capacity of the PLC station. The backplane bus delivers high-speed data exchange between the CPU and each I/O module. The aluminum base frame provides mechanical rigidity and vibration resistance for industrial field service. The standard version is without conformal coating; the -CC suffix version has PCB conformal coating for corrosive environments. Same part number supports direct replacement of the main rack.

Specs

Device Type: PLC Main Backplane Base Model: HONEYWELL 2MLB-M08A Brand: Honeywell Series: MasterLogic‑200 (ML200) Slot Count: 8 slots Compatible Modules: ML200 CPU, ML200 series I/O and communication modules Expansion: Supports connection with 2MLB‑ExxA extension bases Backplane: High-speed parallel control bus Mounting: DIN rail mounting Dimensions: 318 × 98 × 19 mm Weight: Approx. 0.42 kg Operating Temperature: 0°C ~ +55°C Humidity: 5% ~ 95% RH, non-condensing Coating: Standard non-coated; 2MLB-M08A-CC = conformal coated

Principle

The HONEYWELL 2MLB-M08A integrates the backplane bus traces and power distribution paths. After the CPU and I/O modules are plugged into the slots, the backplane establishes communication and power connections. The CPU exchanges data with each I/O module via the base backplane bus, reading field input signals and sending output control commands. The main base also provides the physical expansion interface to link additional extension racks for larger I/O requirements.

Applications

The HONEYWELL 2MLB-M08A is the main rack for MasterLogic‑200 PLC stations in process skids, power control rooms, water treatment plants and petrochemical automation systems. The HONEYWELL 2MLB-M08A is stocked as spare part for rack replacement and cabinet maintenance. It also supports new ML200 station construction and control system expansion.