The Honeywell 2MLB-M12A serves as the central mounting platform for MasterLogic-200 programmable logic controller systems. Specifically, this main base accommodates up to twelve modules, including the CPU, power supply, communication interfaces, and various I/O cards. As a result, it eliminates the need for multiple separate base units in high-density control architectures.
Engineers commonly deploy this base in process control, factory automation, and machine control applications. Furthermore, its slim 19 mm depth allows efficient use of standard industrial cabinet space. The unit provides the physical foundation and electrical backplane required for deterministic signal distribution between installed modules.
The following parameters define the electrical and mechanical boundaries of the 2MLB-M12A base unit.
| Parameter | Specification |
|---|---|
| Module Capacity | 12 modules |
| Compatible CPU | 2MLI-CPUU configuration |
| Backplane Function | Power distribution and communication bus |
| Mounting Hole Distance | 406 × 75 mm |
| Mounting Hole Size | Ø4.5 mm (M4 screws) |
| Dimensions (L×W×H) | 426 × 98 × 19 mm |
| Net Weight | 0.54 kg |
Additionally, the base supports panel mounting as its primary installation method. The compact footprint ensures compatibility with standard enclosure layouts.
The 2MLB-M12A base is constructed to withstand demanding industrial environments. While the base itself is a passive component, its design complements the environmental ratings of the installed modules.
Operating temperature ranges vary across compatible module configurations. Typically, MasterLogic-200 systems operate within -20°C to +60°C in standard deployments. Furthermore, the base's metal and thermoplastic construction resists vibration and mechanical shock encountered in factory floors.
Adequate ventilation remains critical for system reliability. Specifically, installers should maintain clearance above and below the base to allow natural convection. Meanwhile, the 19 mm profile minimizes obstruction within the cabinet.
Proper installation of the Honeywell 2MLB-M12A ensures long-term stability and signal integrity. The following steps outline the mechanical and electrical procedures.
First, verify the cabinet mounting position and required clearances. Next, mark and drill the Ø4.5 mm mounting holes at the documented 406 × 75 mm spacing. After that, secure the base using M4 screws, ensuring the unit sits level and free of mechanical stress.
Connect the functional ground (FG) terminal to a low-impedance earth ground. This step prevents common-mode noise from affecting backplane communication. Furthermore, route signal wiring away from high-voltage cables to reduce electromagnetic interference.
Power down the system before inserting modules. Align each module carefully with the backplane connector, then apply even pressure until it seats firmly. Finally, verify that all twelve slots are populated only with compatible MasterLogic-200 modules.
1 × Honeywell 2MLB-M12A Main CPU Base
1 × Installation Reference Sheet
Note: Certificates and warranty documents are not included in the standard packaging.
All orders ship via Fedex, UPS, DHL with tracking available.
Q1: What is the maximum number of modules the 2MLB-M12A supports?
A: The base accommodates up to 12 modules, including the CPU, power supply, and I/O cards.
Q2: Is the 2MLB-M12A compatible with all Honeywell PLC families?
A: No. Specifically, this base is designed for the MasterLogic-200 series and supports the 2MLI-CPUU CPU configuration.
Q3: Can I mount this base on a DIN rail?
A: The primary documented method is direct panel mounting using M4 screws. However, some third-party sources indicate DIN rail compatibility may be possible with additional hardware. Verify against your specific cabinet design.
Q4: What is the shipping weight of the 2MLB-M12A?
A: The net weight is 0.54 kg. Gross shipping weight is approximately 1.50 kg after packaging.
Q5: Does the package include a power supply module?
A: No. The 2MLB-M12A is a passive base unit. Power supply, CPU, and I/O modules must be ordered separately.
| Brand Name | |
| Model No. | 2MLB-M12A |
| Product Type | Main Baseplate |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
