Available. The Mitsubishi Q52B is a compact extension base unit designed for the MELSEC-Q series programmable logic controllers (PLCs). It features two I/O slots, allowing for modular expansion without the need for an additional power supply unit. This design facilitates efficient system growth while maintaining a streamlined setup. The Q52B is characterized by its compact dimensions—106 mm in width, 98 mm in height, and 44.1 mm in depth—and a lightweight construction of 0.14 kg, making it suitable for applications where space and weight are critical considerations. Its robust construction ensures reliable performance in various industrial environments. The unit is compatible with the MELSEC-Q series modules, offering flexibility in system configuration. The Q52B is UL, cUL, CE (EMC), CE (RoHS), KC (EMC), LR, NK, DNV, ABS, RINA, BV certified, ensuring compliance with international standards. This makes it a reliable choice for industrial automation applications requiring modular PLC expansion.