Siemens 6ES7403-1TA01-0AA0 Programmable Logic Controller

The Siemens 6ES7403-1TA01-0AA0 PLC belongs to the SIMATIC S7-400 racks family and provides an efficient way to expand existing automation setups. With 18 slots, it accommodates a wide range of signal modules, making it ideal for complex control infrastructures that require extensive I/O capacity. Support for redundant power supplies ensures higher system availability, reducing downtime risks in mission-critical applications. Measuring 30.70 × 59.10 × 4.70 cm and weighing 4.199 kg, the rack is compact for its capacity yet robust enough for industrial use. Although it is currently listed as an active PM300 lifecycle product, Siemens has announced a phase-out from 01.10.2025. This makes timely procurement important for engineers planning expansions or replacements in long-term projects. Industrial buyers trust the 6ES7403-1TA01-0AA0 for its combination of scalability, Siemens’ build quality, and proven integration with S7-400 systems. Built as an ER1 extension rack with 18 slots, it is designed specifically for housing signal modules and supports 2 redundant power supplies, providing scalability and reliability for large distributed automation systems.

Applications of the Siemens 6ES7403-1TA01-0AA0 PLC rack cover industries that require large modular expansions with high reliability. In automotive and aerospace production lines, it enables the integration of multiple signal modules to manage robotics, conveyors, and testing systems. In heavy industries such as steel, cement, and petrochemicals, the 18-slot ER1 rack supports complex distributed I/O networks where redundancy is critical. Power plants and utilities deploy the 6ES7403-1TA01-0AA0 for distributed monitoring and control, benefiting from its ability to house multiple modules while maintaining uptime with dual power supply options. For engineering students and maintenance teams, this rack highlights Siemens’ approach to modular, scalable, and fault-tolerant system design. By adopting the Siemens 6ES7403-1TA01-0AA0, industries achieve efficient expansion, strong redundancy, and long-term integration within the SIMATIC S7-400 ecosystem, while planning ahead for the announced phase-out timeline.