Mitsubishi A38B Base Plate – Durable, High-Quality Replacement for Industrial Machinery
Mitsubishi Base Board A38B
The Mitsubishi A38B base unit has 5 slots and supports QnA/A series module installation with power supply. A program entered via a programmer is stored in user memory, and the CPU translates it into an internal compiled format using the system’s interpreter. The relay output interface operates as follows: when a digital signal "1" is output, current flows through the relay coil, closing the normally open contact to supply load voltage/current; when "0" is output, no current flows, the contact opens, and the load is disconnected. I/O points are a key PLC specification. Proper selection minimizes cost while meeting control requirements. Each input/output device typically uses one I/O point, and a 20–30% spare capacity is recommended for future expansion. The text also introduces estimation methods for centralized control systems.
The Mitsubishi A38B base unit has 5 slots and supports QnA/A series module installation with power supply. Programs entered via a programmer are stored in user memory, and the CPU's system program translates them into PLC-internal format. The relay output interface works by outputting a digital signal 1 to energize the relay coil, closing the normally open contact to power the load; a digital signal 0 de-energizes the coil, opening the contact and disconnecting the load. I/O points are a key PLC specification. Selecting the right number minimizes cost while meeting control needs. Each I/O device typically requires one point. A 20–30% spare capacity should be added for future adjustments. The text introduces I/O point estimation for centralized control systems.
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