SIEMENS 6ED1055-1MB00-0BA2

The 6ED1055‑1MB00‑0BA2 expansion module fills a common gap when a base logic controller lacks sufficient I/O for practical automation tasks. If you are managing a small building automation system, water or pump control, lighting circuits or simple machinery — but need more inputs for sensors/switches and outputs to drive relays, motors or loads — this module adds exactly what you need. With 4 additional digital inputs, you can connect sensors, switches, or status contacts. The 4 relay outputs give you direct control over devices: lights, pumps, valves, alarms or other actuators.

Because it draws power from 12–24 V DC and mounts on a standard DIN rail, installation is clean and straightforward, even inside compact control panels. Screw‑terminal connections simplify wiring and maintenance. As part of the LOGO! ecosystem, it integrates seamlessly with LOGO! base modules — so programming logic, timers or automation sequences remains simple and unified. Compared to external relay panels or homemade wiring-bundles, this Siemens expansion module provides a neat, professionally engineered solution with predictable performance, better reliability, and a smaller footprint. For small‑ to mid‑scale automation, it’s a cost‑effective way to grow system capability without replacing the main controller — saving time and money while ensuring robustness.