Mitsubishi A1S68B-S1 Base Unit Programmable Logic Controller Rack Extention A1S68BS1

Description:

The Mitsubishi A1S68B-S1 is a base unit (rack) for the MELSEC-A series PLC system, designed to house and interconnect multiple PLC modules such as CPU, power supply, and I/O modules. It provides the backplane communication and power distribution required for system operation. Commonly installed in industrial control panels, it is used by maintenance teams and system integrators for system expansion, modular configuration, and replacement of legacy PLC racks.

Applications:

The Mitsubishi A1S68B-S1 base unit is used in industrial automation systems requiring modular PLC configuration and expansion. Typical applications include manufacturing lines, process control systems, and machine automation where multiple PLC modules must be integrated into a centralized control architecture with reliable communication and power distribution.

Technical Specifications:

• Manufacturer Part Number (MPN): A1S68B-S1
• Product Type: PLC Base Unit / Rack
• Series: MELSEC-A
• Number of Slots: 8 slots (module mounting capacity)
• Mounting Type: Panel mount (control cabinet installation)
• Backplane Function: Provides module communication and power distribution
• Compatible Modules: A-series CPU, power supply, I/O, and special function modules
• Power Supply: Supplied via installed power module
• Expansion Capability: Supports system expansion via additional base units
• Construction: Industrial-grade modular rack design
• Application Class: Medium to large-scale automation systems
• Status: Discontinued / legacy platform

Common Replacements:

• Mitsubishi Q38B (Q-series 8-slot base unit)
• Mitsubishi Q35B (Q-series smaller rack option)
• Mitsubishi iQ-R series base units (modern platform upgrade)