SIEMENS SIMATIC S5-101U 6ES5101-8UA13

Siemens SIMATIC S5-101U Central Controller Description The Siemens SIMATIC S5-101U (6ES5101-8UA13) is a compact and robust central controller unit from the legacy SIMATIC S5 series. This PLC is designed for small to medium-sized automation tasks and integrates the CPU, power supply, and digital I/O into a single housing. It is a highly sought-after spare part for maintaining existing industrial equipment and control systems that rely on the proven S5 platform. Specifications Manufacturer: Siemens Product Line: SIMATIC S5 Model: S5-101U Order Number (MLFB): 6ES5101-8UA13 Supply Voltage: 120/230V AC Digital Inputs: 20 x 24V DC Digital Outputs: 12 x Relay Outputs Programming Port: PG Interface (DB-15) Label Info SIMATIC S5-101U 20 I/E (Inputs) 12 Q/A (Outputs) 220/240 V~ Application This PLC is ideal for extending the life of older machinery in various industries, including manufacturing, material handling, and process control. It serves as a direct replacement for failed units, preventing costly system upgrades. Country of Origin Made in Germany. CO2 Impact By purchasing this pre-owned component, you contribute to the circular economy and avoid the emission of approximately 24 kg of CO2, which would have been generated during the production of a new unit. Availability This is an obsolete item, available as a tested, used component. Stock is limited. Order now from profideals for expert support and fast delivery. FAQ What programming software is required for the S5-101U?The SIMATIC S5 series, including the S5-101U, is programmed using Siemens STEP 5 software. This is legacy software and is not compatible with modern TIA Portal. Can I replace the battery on this unit?Yes, the S5-101U has a user-replaceable battery to back up the program memory. The battery compartment is typically accessible from the front panel. Is this unit compatible with modern Profibus or Profinet networks?No, not natively. The S5-101U does not have built-in Profibus or Profinet capabilities. Connection to such networks would require specific S5-era communication modules, which are also obsolete and difficult to find. profideals is not an authorized distributor, reseller or representative of the products featured on this website. All product names, trademarks, brands and logos used on this site are the property of their respective owners. Last Update: Friday, March 13, 2026