Siemens 305DC-02B Programmable Logic Controller Module

The Siemens 305DC-02B is a 5-slot, rack-mounted Programmable Logic Controller base module designed for legacy SIMATIC TI 305 systems, combining power distribution, backplane signaling, and expansion capability in a compact chassis that supports both local operation and field-expansion configurations. It delivers a 48-watt DC power rail with an output range of 20 to 28 V DC to feed TI 305 CPUs and I/O modules, while relying on an AC input power supply capable of 110 or 220 VAC, enabling operation across different regional electrical standards. As a DC-powered backbone, the 305DC-02B consolidates essential functions in a single 5-slot enclosure, simplifying wiring and inter-module communication within the TI 305 ecosystem and providing a stable platform for legacy control logic. Common use cases include retrofits, repair, and maintenance of older packaging, process, and manufacturing lines that rely on TI 305-based controllers, where technicians value compatibility, availability of spare parts, and the continuity of a familiar Siemens control architecture.