Schneider Electric TSX3721101 Rack Power Supply

The Schneider Electric TSX3721101 is a modular PLC in the Modicon TSX Micro family that combines a base controller with an integrated 24 VDC power supply (19.2–30 VDC input range), delivering a compact, rack-mountable automation solution for industrial machines and process control tasks such as conveyors, packaging lines, and material handling systems. Configured with 3 slots for expansion, it houses 20 Kwords of internal RAM and 15 Kwords of flash memory, and it supports PCMCIA expansion up to 128 Kwords to store larger control programs and data sets, making it adaptable for varying automation needs. Communication is provided through Uni-Telway (TER/AUX) and Modbus RTU ports, a built-in real-time clock, and compatibility with TSX Micro Expansion Modules, enabling integration into complete TSX Micro Automation platforms and scalable system architectures, with mounting suitability for panel-mount or modular-rack installations. As a discontinued legacy PLC platform offered as an OEM direct replacement, it is commonly replaced by the Modicon M221 PLC, while OEM-equivalent TSX3721101 units are also cited as alternatives for legacy installations.