Siemens 6ES7390-7BA00-0AA0 Programmable Logic Controller

The Siemens 6ES7390-7BA00-0AA0 is a connecting comb specifically designed for SIMATIC S7-300 systems. It links the PS307 power supply with second-generation CPUs manufactured before 2003, making it a vital spare part for legacy system maintenance. Weighing only 0.007 kg and packaged in a compact 5.00 x 5.00 x 5.00 cm box, it offers a plug-and-play interface for engineers working in space-constrained cabinets or during emergency breakdowns.

This Siemens PLC spare module is part of the Ordering Data Overview family and falls under the PM400 product lifecycle, with an official phase-out announced since October 2023. Despite being phased out, it remains in demand due to its critical role in keeping legacy automation lines operational. Maintenance teams trust this component because it ensures continuity without rewiring or reprogramming newer hardware, which is especially beneficial in regulated industries like pharmaceuticals, F&B, and process automation.

The Siemens 6ES7390-7BA00-0AA0 PLC connecting comb is essential for industries that still operate SIMATIC S7-300 systems with PS307 power supplies and early-generation CPUs. It ensures stable and secure power transmission between modules without introducing signal issues or requiring external wiring adjustments.

In Indian industrial plants—particularly in sectors like pharmaceuticals, chemicals, and packaging—many factories still rely on well-established Siemens S7-300 PLC setups. During planned shutdowns or equipment servicing, engineers often encounter damaged or aged connectors between the power supply and CPU. This is where the 6ES7390-7BA00-0AA0 becomes critical, offering a drop-in replacement that restores full operational continuity in minutes.

Because it fits precisely into older S7-300 racks, this Siemens 6ES7390-7BA00-0AA0 PLC module is a trusted option for technicians looking to avoid unnecessary upgrades.