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6ES5928-3UB21 Siemens
Product Details
Specifications provided for reference. Verify critical details against official manufacturer documentation before installation.
Product Overview
The 6ES5928-3UB21 is a SIMATIC S5 CPU 928B module, part of the legacy Siemens S5-135U/155U controller family. It serves as the central processing unit for logic control and sequencing tasks in existing S5 installations. Designed as a single-width spare part with an SS slot for a second interface module, the 6ES5928-3UB21 supports continued operation or repair of legacy S5 systems, commonly encountered in industrial applications such as discrete manufacturing, batch processing, and infrastructure where modernization may not yet be feasible.
Best Suited For
- Replacement in existing S5-135U/155U systems
- Spare-part inventory for legacy automation
- On-site repairs in older centralized PLC installations
- Maintenance of running S5 control systems